tag:blogger.com,1999:blog-84066845133176457242024-03-13T20:31:38.349-07:00Audio Amplifier Circuitschematic diagramhttp://www.blogger.com/profile/10351645467260086674noreply@blogger.comBlogger53125tag:blogger.com,1999:blog-8406684513317645724.post-27583224339424984082017-03-03T02:38:00.004-08:002017-03-03T02:38:46.794-08:00Mini Stereo Audio Amplifier using IC TEA2025<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgWX7I-QCopKKF9ZogHQGBmLedJOwdJsy53k3W9J0mT7jSyoXArCqKS4NCTwTtLXEcuEi9fQfTXSzAXnYq8qXPlaAPG7dVAqEY6-9YIFc_hEKbOewA-yP5ZYStPYCqitETIGzsTd_55QJU/s1600/2.5W+Mini+Stereo+Audio+Amplifier+TEA2025.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="285" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgWX7I-QCopKKF9ZogHQGBmLedJOwdJsy53k3W9J0mT7jSyoXArCqKS4NCTwTtLXEcuEi9fQfTXSzAXnYq8qXPlaAPG7dVAqEY6-9YIFc_hEKbOewA-yP5ZYStPYCqitETIGzsTd_55QJU/s320/2.5W+Mini+Stereo+Audio+Amplifier+TEA2025.jpg" width="320" /></a></div>
<br />
This is a very simple schematic diagram of mini stereo audio amplifier build based the main power IC of TEA2025. This IC support both single audio channel and stereo audia channel. There will be 2x2.5W for stereo channel and 5W for mono channel with bridge mode. TEA2025 is a monolithic integrated audio amplifier in a 16-pin plastic dual in line package. It is designed for portable cassette players and radios, featured with Working Voltage down to 3V, Few External components, High Channel isolation, Voltage gain up to 45dB(Adjustable with external resistor), Soft clipping and Internal Thermal protection.<br />
<a name='more'></a><br />
<br />
<h2>
Mini Stereo Audio Amplifier Scheme</h2>
<br />
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjDe242Sx0iyNCZvoFPxSH3L2U9O9Ry4C_iuwVV70Jefb-gXgDCi7FeByrpAhhb7TJkUVZvTlbelWMcl_xQBHM9EYf8WxbMW0e0Md60CsSXteZ1fDfaweZxnkqFyytybODla9GS-rcgUhc/s1600/Mini+Stereo+Audio+Amplifier+TEA2025.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="242" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjDe242Sx0iyNCZvoFPxSH3L2U9O9Ry4C_iuwVV70Jefb-gXgDCi7FeByrpAhhb7TJkUVZvTlbelWMcl_xQBHM9EYf8WxbMW0e0Md60CsSXteZ1fDfaweZxnkqFyytybODla9GS-rcgUhc/s320/Mini+Stereo+Audio+Amplifier+TEA2025.png" width="320" /></a></div>
<br />
<h2>
Mini Stereo Audio Amplifier Part List:</h2>
C1 100µF/16V Elco<br />
C2 100µF/16V Elco<br />
C3 100µF/16V Elco<br />
C4 100µF/16V Elco<br />
C5 100µF/16V Elco<br />
C6 470µF/16V Elco<br />
C7 100µF/16V Elco<br />
C8 470µF/16V Elco<br />
C9 0.22µF <br />
C10 0.22µF <br />
C11 0.15µF <br />
C12 0.15µF <br />
TEA2025 TEA2025B <br />
SPKR1 4-8 Ohm speaker<br />
SPKR2 4-8 Ohm speaker<br />
R1+R2 10K DUAL Potentiometer<br />
<br />
This <a href="http://circuitdiagram.net/">circuit project</a> come from build-electronic-circuits<dot>com, go there for other interesting projects. Goodluck.. :)</dot>schematic diagramhttp://www.blogger.com/profile/10351645467260086674noreply@blogger.com0tag:blogger.com,1999:blog-8406684513317645724.post-33821823221211639722015-03-28T07:15:00.001-07:002015-03-28T07:15:39.387-07:00100W Amplifier with Transistor 2N3055 and MJ2955<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEinVahjtVz5D2XGI2jVH4_kdF4nHtkxk3P2ldKgmE40jSbB0npgUXEHdgkq6rCA9pGHJg8yF12T5QJ5jVLc5DwjjYD6ezqD2ggTDh5avnQ97ELL6yC2Jq9biyNSid_LLo9gZcU53ns_150/s1600/100W+Transistor+Amplifier+2N3055+MJ2955.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEinVahjtVz5D2XGI2jVH4_kdF4nHtkxk3P2ldKgmE40jSbB0npgUXEHdgkq6rCA9pGHJg8yF12T5QJ5jVLc5DwjjYD6ezqD2ggTDh5avnQ97ELL6yC2Jq9biyNSid_LLo9gZcU53ns_150/s1600/100W+Transistor+Amplifier+2N3055+MJ2955.jpg" height="320" width="316" /></a></div>
<br />This is the circuit diagram of 100W amplifier with paired transistor 2N3055 and MJ2955. 2N3055 and MJ2955 is a silicon power transistor used mostly in amplifier and power supply circuitsbut it is designed for general–purpose switching and amplifier applications. 2N3055 transistor is packed in a TO-3 can, the maximum power rating is 115W, voltage 60V and 15 amperes maximum with a beta gain of 20 to 70 at a collector current of 4A.<br />
<br />
<a name='more'></a>Its popularity is because it could dissipate 115W (full power) at a collector voltage of 60V and a collector current of 1.9A and still the case temperature did not exceeded 250C.<br />
<br />
This 100W amplifier circuit operated with symmetrical / dual polarity power supply. <br />
<br />So much talking… Let’s begin to present you some of the most used 2N3055 amplifier circuits available on the internet! This article is full with schematics, designs and probably new amplifier concepts.<br /><br />A great stereo amplifier built with 2 x 2N3055 and 2 x MJ2955 power transistors, we cannot tell you if it is an 2 x 100W stereo amplifier or 2 x 50W…<br />
<br />
<br />
<b>100W Amplifier with Transistor 2N3055 and MJ2955</b><br />
<b>Part List:</b><br />
<br />
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgpe26Dw04Sq0kbhwQd5QLwD7ypR68Jz9SVDAHcVnKTXmvbQ7_1rAJ7at8R3pXaBS0vqVQ__tIgr644JypWCPI2m3S3bLgYlzyvqCHJWJ1uA57rmxS9QWPpiFWlwV7u7RpX0ygpNa5FnAw/s1600/100W+Transistor+Amplifier+Component+List.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgpe26Dw04Sq0kbhwQd5QLwD7ypR68Jz9SVDAHcVnKTXmvbQ7_1rAJ7at8R3pXaBS0vqVQ__tIgr644JypWCPI2m3S3bLgYlzyvqCHJWJ1uA57rmxS9QWPpiFWlwV7u7RpX0ygpNa5FnAw/s1600/100W+Transistor+Amplifier+Component+List.jpg" height="320" width="186" /></a></div>
<br />
<b>PCB Design: </b><br />
<br />
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjxfQMJVypvGcdTJt2r3CxPaYc_bEL7nOzG54E1SCNFoKqH5hBYn4HOJXZt3aMmuC2wzovLshcmKMVIkeyiYS-uU_K3edKvTnBrSV8Gfsn_iPGAeuGYQquv_6KZMPqJhYOBWMOm3Raly4U/s1600/100W+Transistor+Amplifier+Top+PCB.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjxfQMJVypvGcdTJt2r3CxPaYc_bEL7nOzG54E1SCNFoKqH5hBYn4HOJXZt3aMmuC2wzovLshcmKMVIkeyiYS-uU_K3edKvTnBrSV8Gfsn_iPGAeuGYQquv_6KZMPqJhYOBWMOm3Raly4U/s1600/100W+Transistor+Amplifier+Top+PCB.jpg" height="190" width="320" /> </a></div>
<div class="separator" style="clear: both; text-align: center;">
<br /></div>
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhrI6fkqQkHv83cohtv7rtTuctOhiC9w9S-O0FWwBmETpC5R-4EbXpu7NMOvsSchcFx6lY1WyqA_OvIT-tfr-aKU1Y1PUYtRXDRcWyeRBE6H0GhZNlag7eftZSLSHgKZ1bisBlnh4WiolU/s1600/100W+Transistor+Amplifier+Bottom+PCB.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhrI6fkqQkHv83cohtv7rtTuctOhiC9w9S-O0FWwBmETpC5R-4EbXpu7NMOvsSchcFx6lY1WyqA_OvIT-tfr-aKU1Y1PUYtRXDRcWyeRBE6H0GhZNlag7eftZSLSHgKZ1bisBlnh4WiolU/s1600/100W+Transistor+Amplifier+Bottom+PCB.jpg" height="189" width="320" /></a></div>
<br />schematic diagramhttp://www.blogger.com/profile/10351645467260086674noreply@blogger.com0tag:blogger.com,1999:blog-8406684513317645724.post-77558547687816852522014-11-18T23:51:00.001-08:002014-11-18T23:51:51.159-08:002 x 15W Stereo Audio Amplifier with TDA4935<br />
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhOsxIUYMY0L5Gy1-3UzUkb6TB9ljykIUoIy0ofFUK1JWo-vtWkLJO1YpvIi_k-MWdXz6iANd4VX2i2aVP8zsllXm-ZI4aq-LPYbDBR28fDYIqpZn2xV1Bsx0TgEMwMtFkHqgaSp2m3zho/s1600/2+x+15W+Stereo+Audio+Amplifier+with+TDA4935.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhOsxIUYMY0L5Gy1-3UzUkb6TB9ljykIUoIy0ofFUK1JWo-vtWkLJO1YpvIi_k-MWdXz6iANd4VX2i2aVP8zsllXm-ZI4aq-LPYbDBR28fDYIqpZn2xV1Bsx0TgEMwMtFkHqgaSp2m3zho/s1600/2+x+15W+Stereo+Audio+Amplifier+with+TDA4935.jpg" height="233" width="320" /></a></div>
This is the scheme diagram of 2 x 15W stereo audio amplifier using single power IC TDA4935. The amplifier is a Class B stereo and is designed with the TDA4935 from Siemens, which delivers 15 watts each channel. It can also be configured in BTL or bridge, thus delivering 30 watts in mono channel configuration.<br />
<br />
<a name='more'></a><br />
<b>Components List:</b><br />
R1, R2: 1 Ω 2 watts<br />
C1, C2, C3, C4: 220 nF. ceramic capacitors<br />
C5, C6, C8: 1000 uF. 35 volt electrolytic capacitor<br />
C7: 100 uF. 35 volt electrolytic capacitor<br />
C9 100 nF. ceramic capacitor<br />
IC1: TDA4935<br />
4 Ω Speakers 30 watts<br />
Power supply of 13.5 volts or battery of a vehicle<br />
<br />
Its power depends on the output impedance, ie if we use 8 ohm speaker output, the range of power supply used is minimum of 8V and a maximum of 30V, for this design have chosen 24 volts,follow the recommendation in the datasheet. If 4 ohm speaker is used, as in our case, the maximum voltage to be applied should be 24 volts. It should be mentioned that the ideal supply voltages are a minimum of 8V and a maximum of 24V, to guarantee the life of the integrated circuit.<br />
<br />
This amplifier has the feature of PLS few external components, making it easy to mount, only uses 9 capacitors and two resistors.<br />
<br />
In the BTL configuration you'll get a 60 watt amplifier assembly 2 units.<br />
<br />
<br /><br />
Download <a href="http://www.datasheetcatalog.com/datasheets_pdf/T/D/A/4/TDA4935.shtml" target="_blank">TDA4935 Datasheet</a>schematic diagramhttp://www.blogger.com/profile/10351645467260086674noreply@blogger.com0tag:blogger.com,1999:blog-8406684513317645724.post-46047195125191101142014-06-20T21:13:00.004-07:002014-06-20T21:13:58.765-07:0080W Power Amplifier based Single Power IC LM12 / LM12CL<div style="text-align: center;">
<img alt="80W Power Audio Amplifier with LM12 circuit" src="http://schematics.circuitdiagram.net/images/jdv1256446899i.gif" /></div>
<br />
This is the schematic diagram of power audio amplifier using single power IC LM12 / LM12CL. The design is very simple. This power amplifier needs power supply with dual polarity output ( +, gnd, - ), don't exceed than 60V : (+30V) ; ground ; (-30V).<br />
<a name='more'></a><br />
The LM12 is a power amplifier capable of driving ±25V at ±10A while operated at ±30V supplies (Vmax 60V). The monolithic IC can deliver 80W of sine wave power into a 4Ω load with 0.01% distortion. Power bandwidth is 60 kHz. Further, a peak dissipation capability of 800W allows it to handle reactive loads such as transducers, actuators or small motors without derating.<br />
<br />
The IC delivers ±10A output current at any output voltage yet is completely protected against overloads, including shorts to the supplies. The dynamic safe-area protection is provided by instantaneous peak-temperature limiting within the power transistor array.<br />
<br />
The turn-on characteristics are controlled by keeping the output open-circuited until the total supply voltage reaches 14V. The output is also opened as the case temperature exceeds 150°C or as the supply voltage approaches the BVCEO of the output transistors. The IC withstands overvoltages to 80V.<br />
<br />
This monolithic op amp is compensated for unity-gain feedback, with a small-signal bandwidth of 700 kHz. Slew rate is 9V/μs, even as a follower. Distortion and capacitive-load stability rival that of the best designs using complementary output transistors. Further, the IC withstands large differential input voltages and is well behaved should the common-mode range be exceeded.<br />
<br />
The LM12 establishes that monolithic ICs can deliver considerable output power without resorting to complex switching schemes. Devices can be paralleled or bridged for even greater output capability. Applications include operational power supplies, high-voltage regulators, high-quality audio amplifiers, tape-head positioners, x-y plotters or other servo-control systems.<br />
<br />
<b>PCB Layout:</b><br />
<br />
<div style="text-align: center;">
<img alt="80W Power Audio Amplifier with LM12 pcb layout" src="http://schematics.circuitdiagram.net/images/viu1256447299m.gif" /></div>
<br />
<b>Features:</b><br />
<ul>
<li>Input Protection</li>
<li>Controlled Turn On</li>
<li>Thermal Limiting</li>
<li>Overvoltage Shutdown</li>
<li>Output-Current Limiting</li>
<li>Dynamic Safe-Area Protection</li>
</ul>
schematic diagramhttp://www.blogger.com/profile/10351645467260086674noreply@blogger.com0tag:blogger.com,1999:blog-8406684513317645724.post-43626634205905280052014-06-20T20:47:00.002-07:002014-06-20T20:47:38.652-07:005W Audio Amplifier based LA4460<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgKcVOYFX_UYEVDfxGTAtxCjkm8WmT3Ao4HfHQ1JdhC-e5BbZwLH8YJjg9SeV5I8d_028-MI9L5Srn4bzYzF4_DxCwZexo_kGK8Gez2hYG3HXVLwPLWijQhUd-E9yXIXb4ElwaZZatkU0Y/s1600/5w+audio+amplifier+with+LA4460.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgKcVOYFX_UYEVDfxGTAtxCjkm8WmT3Ao4HfHQ1JdhC-e5BbZwLH8YJjg9SeV5I8d_028-MI9L5Srn4bzYzF4_DxCwZexo_kGK8Gez2hYG3HXVLwPLWijQhUd-E9yXIXb4ElwaZZatkU0Y/s1600/5w+audio+amplifier+with+LA4460.jpg" height="186" width="320" /></a></div>
<br />
<br />
This is the scheme diagram of 5W audio power amplifier which can be built for general purpose and can drive speakers approximately 8 to 12 inches. This 5W audio amplifier circuit is based on the Sanyo LA4460 IC. Based on the IC datasheet, the LA4460 has capability to drive up to 12W power output, of course you will need more power in your power supply.<br />
<br />
<a name='more'></a><br /><br />
This Low-power amplifier circuit have built in loudness control, driver amplifier Q1, and the bass/treble controls of around ± 10 dB boost / cut. It would be useful in a wide variety of situations. Either displayed ac supply can be used, or 12 VDC supply can be connected to points A & B (positive) and C (negative). For stereo circuit can be used two of this circuit by using ganged potentiometer at R2, R7 and R11. T1 is 12V at 1 ampere plug-in transformer. schematic diagramhttp://www.blogger.com/profile/10351645467260086674noreply@blogger.com0tag:blogger.com,1999:blog-8406684513317645724.post-78472726229963139302012-08-09T00:57:00.002-07:002012-08-09T00:57:21.651-07:00Notebook / Netbook Audio Amplifier<br />
The audio output from a standart notebook or netbook with built-in speakers is low and the quality is also low. Alternatively, you can use a earphones to make good quality audio output, but for some people, earphones is unconfortable for them.<br />
<br />
A power amplifier is needed to achieve a high volume. The following diagram is a simple circuit to amplify the notebook’s audio output. <br />
<br />
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj0LaHcO9xeHuPiyZdYO1yS08ASpkkIlnTkVGamRYxJGxAm3OQpvSBiYjohhs4CLj_iB-nXBAdJjnzj9E7ZRMDhlNUpb_18zeLmX6AjHWv3_YqmrSLUnQs31XWggrfdVugoIaOovTwgPwE/s1600/audio+amplifier+for+notebook.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj0LaHcO9xeHuPiyZdYO1yS08ASpkkIlnTkVGamRYxJGxAm3OQpvSBiYjohhs4CLj_iB-nXBAdJjnzj9E7ZRMDhlNUpb_18zeLmX6AjHWv3_YqmrSLUnQs31XWggrfdVugoIaOovTwgPwE/s320/audio+amplifier+for+notebook.jpg" width="224" /></a></div>
<br />
The circuit is very simple and inexpensive, it use power amplifier IC LA4440 (IC1) and a few other components. LA4440 is a dual channel audio power amplifier, so you just need an IC for stereo application. It has low distortion over a wide range of low to high frequencies with good channel separation. Inbuilt dual channels enable it for stereo and bridge <a href="http://amplifier-circuit.blogspot.com/" target="_blank">amplifier</a> applications.<br />
<br />
<a name='more'></a><br />
<br />
In dual mode LA4440 gives 6 watts per channel and in bridge mode 19- watt output. It has ripple rejection of 46 dB. The audio effect can be realized by using two 6-watt speakers. Connect pins 2, 6 and ground of IC1 to the stereo jack which is to be used with the notebook. Assemble the <a href="http://circuitdiagram.net/" target="_blank">circuit</a> on a general-purpose PCB and enclose in a proper case. The circuit is recommended to be powered using regulated 12V power supply to minimalize the noise or "hum" sound. It is recommended to use audio input socket in the circuit board. Mount the LA4440 on heatsink to prevent overheating on IC.<br />
<br />schematic diagramhttp://www.blogger.com/profile/10351645467260086674noreply@blogger.com0tag:blogger.com,1999:blog-8406684513317645724.post-65178931529206091192012-05-24T19:19:00.003-07:002012-05-24T19:20:23.136-07:0050W Amplifier Kit Project based TDA1514A<br />
<br />
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg9n9dOelNY0xbMRk816HUHoVF0c7M4kcQEmS5pxOr0Ph9pyez6v8Fr-uEsa0TSQBeyQ2jZkFnsDEgZ5GB2NOCVQBjFq_eLp7l29wBio0qfYEf0rr2BkOhuHshHSSWzYraiF8cM2sN9hyphenhyphen0/s1600/TDA1514A+50W+amplifier.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img alt="TDA1514A amplifier circuit" border="0" height="225" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg9n9dOelNY0xbMRk816HUHoVF0c7M4kcQEmS5pxOr0Ph9pyez6v8Fr-uEsa0TSQBeyQ2jZkFnsDEgZ5GB2NOCVQBjFq_eLp7l29wBio0qfYEf0rr2BkOhuHshHSSWzYraiF8cM2sN9hyphenhyphen0/s320/TDA1514A+50W+amplifier.jpg" title="TDA1514A amplifier circuit" width="320" /></a></div>
<br />
Here the very simple but powerful amplifier kit which built based on TDA1514A amplifier chip. The circuit is for single channel only, you should build two similar circuit for stereo application. A heatsink is a must to be attached on the IC TDA1514A. This circuit can be used as well as stereo amplifiers Bass in a 5.1 system.<br />
<br />
<a name='more'></a><br />
<b>Components List:</b><br />
<br />
C1, C3, C4 = 0,47 uF <br />
C2 = 220 pF <br />
C5 = 3.3 uF, 50 v <br />
C6 = 220 uF, 50 v <br />
C7 = 0.022 uF <br />
C8 = 47 uF, 100 v <br />
IC1 = TDA1514 <br />
R1 = 680 Ohm <br />
R2, R3 = 20 k <br />
R4 = 470 k <br />
R5 =150 Ohm, 82 Ohm <br />
R6 =3 Ohm <br />
R7 = 82 Ohm, 47 Ohm<br />
<br />
<b>Technical details:</b><br />
<ul>
<li>Input voltage Vcc / Vdd + / - 10 - 30 volts [X3=(+), X6=GND, X7=(-)]</li>
<li>8 A maximum current consumption</li>
<li>No load current 60 A</li>
<li>Output power, laVcc = + -27.5 B and R = 8 Ohm 40 W (X4 and X5)</li>
<li>Input resistance of 20 K (X1 and X2)</li>
<li>Frequency response 20 Hz - 25 KHz</li>
</ul>
<br />
<b>The TDA1514A features:</b><br />
<ul>
<li><span class="tr_" data-source="" data-token="TG93IGhhcm1vbmlj" id="tr_17">Low harmonic</span>, <span class="tr_" data-source="" data-token="aW50ZXJtb2R1bGF0aW9u" id="tr_18">intermodulation</span>, <span class="tr_" data-source="" data-token="b2Zmc2V0IHZvbHRhZ2UgZGlzdG9ydGlvbg,," id="tr_19">offset voltage distortion</span></li>
<li><span class="tr_" data-source="" data-token="R29vZCByaXBwbGU," id="tr_20">Good ripple</span>, <span class="tr_" data-source="" data-token="VGhlcm1hbA,," id="tr_21">Thermal</span>, Safe Operating Area (SOAR) <span class="tr_" data-source="" data-token="cHJlamVjdGlvbg,," id="tr_22">prejection</span></li>
<li>Mute/stand-by facilities</li>
<li>Protected against electrostatic discharge</li>
<li>No switch-on or switch-off clicks</li>
<li>Very low thermal resistance</li>
</ul>
<br />
<b>PCB layout design and PCB layout:</b><br />
<br />
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhDKaj1J3fULv7hKVnqZhkGNp-78SDzLBxCUJSIRyXekiJHEwCvkWTq3o9H19Kw6g83a6Lj0qwgyFZ18Mwf_AQ6cvwHuwatE9i4h3mwDNKJAjRjX4RXVw6EJfjH7Rg0oJsHZIytaQOTnuE/s1600/TDA1514A+amplifier+pcb+layout.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img alt="TDA1514A amplifier PCB design layout" border="0" height="228" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhDKaj1J3fULv7hKVnqZhkGNp-78SDzLBxCUJSIRyXekiJHEwCvkWTq3o9H19Kw6g83a6Lj0qwgyFZ18Mwf_AQ6cvwHuwatE9i4h3mwDNKJAjRjX4RXVw6EJfjH7Rg0oJsHZIytaQOTnuE/s320/TDA1514A+amplifier+pcb+layout.jpg" title="TDA1514A amplifier PCB design layout" width="320" /></a></div>
<br />
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEii-rCihS5ua7u_-4NJSGPRkh73OGSM6EIghg8q30KoB8G0jjvV63yvuFsG4fnPj0lH7KNGodXvNTsNWz1cesYth9yCQJ0P-ncaSVXrZAQ3iHakSflCtWdtEMSpJmdAm_jAPae7tvPvqCE/s1600/tda1514+50W+amplifier+component+placement.gif" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img alt="TDA1514A amplifier component placement" border="0" height="226" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEii-rCihS5ua7u_-4NJSGPRkh73OGSM6EIghg8q30KoB8G0jjvV63yvuFsG4fnPj0lH7KNGodXvNTsNWz1cesYth9yCQJ0P-ncaSVXrZAQ3iHakSflCtWdtEMSpJmdAm_jAPae7tvPvqCE/s320/tda1514+50W+amplifier+component+placement.gif" title="TDA1514A amplifier component placement" width="320" /></a></div>
<br />
<br />
<b><a href="http://amplifiercircuit.net/" target="_blank">Amplifier</a> kit preview:</b><br />
<br />
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhLhBjNeW843na2FdXShT1VhMPircEiZVlgsfHPHTxpzbAWCudvJmYjyTlITh19iaXydRTp3qNPCawp-Hwuiuf5h3QZidkQcCS_S736uK_VypiqpbRAtlU97mWWUSEy0JnFlH0j5l8ca6k/s1600/TDA1514A++kit.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img alt="TDA1514A amplifier kit" border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhLhBjNeW843na2FdXShT1VhMPircEiZVlgsfHPHTxpzbAWCudvJmYjyTlITh19iaXydRTp3qNPCawp-Hwuiuf5h3QZidkQcCS_S736uK_VypiqpbRAtlU97mWWUSEy0JnFlH0j5l8ca6k/s1600/TDA1514A++kit.jpg" title="TDA1514A amplifier kit" /></a></div>schematic diagramhttp://www.blogger.com/profile/10351645467260086674noreply@blogger.com0tag:blogger.com,1999:blog-8406684513317645724.post-7447391728060573832012-04-22T19:38:00.001-07:002017-03-03T03:44:43.566-08:002x2W Stereo Audio Amplifier based LM1877<div style="text-align: center;">
<a href="http://schematics.circuitdiagram.net/viewer.php?id=bwy1335147557e.gif" target="_blank" title="free schematic diagram"><img alt="electronic circuit diagram" border="0" src="http://schematics.circuitdiagram.net/thumbs/bwy1335147557e.gif" /></a></div>
<br />
Here the 2x2 stereo audio amplifier based on single chip LM1877. LM1877 is an amplifier chip designed to deliver 2W/channel continuous into 8Ω loads. This is a very simple and easy build low power audio amplifier with a low number of external components, and still provide flexibility for use in stereo phonographs, tape recorders and AM-FM stereo receivers, etc.<br />
<a name='more'></a><br />
Each power amplifier is biased from a common internal regulator to provide high power supply rejection, and output Q point centering. The LM1877 is internally compensated for all gains greater than 10.<br />
<br />
<b>LM1877 Features</b><br />
<ul>
<li>2W/channel</li>
<li>−65 dB ripple rejection, output referred</li>
<li>−65 dB channel separation, output referred</li>
<li>Wide supply range, 6V–24V</li>
<li>Very low cross-over distortion</li>
<li>Low audio band noise</li>
<li>AC short <a href="http://circuitdiagram.net/" target="_blank" title="circuit diagram">circuit</a> protected</li>
<li>Internal thermal shutdown</li>
</ul>
<br />
<b>LM1877 Applications</b><br />
<ul>
<li>Multi-channel audio systems</li>
<li>Stereo phonographs</li>
<li>Tape recorders and players</li>
<li>AM-FM radio receivers</li>
<li>Servo <a href="http://amplifier-circuit.blogspot.com/">amplifiers</a></li>
<li>Intercom systems</li>
<li>Automotive products</li>
</ul>
<br />
Download LM1877 datasheet <a href="http://downloads.circuitdiagram.net/dll/z3jm3s" rel="nofollow" target="_blank">here</a>schematic diagramhttp://www.blogger.com/profile/10351645467260086674noreply@blogger.com0tag:blogger.com,1999:blog-8406684513317645724.post-45800802828906639682012-04-06T01:53:00.000-07:002012-04-06T01:53:53.910-07:00LM380 Audio Amplifier CircuitsThis is an easy made, really simple and low cost mini audio amplifier based on integrated circuit LM380. Of course the main part of this amplifier is LM380 itself. This LM380 audio amplifier is simple and easy to built because of the simple circuit design which use minimal external components.<br />
<br />
<div style="text-align: center;">
<a href="http://schematics.circuitdiagram.net/viewer.php?id=cqs1333701538r.jpg" rel="nofollow" target="_blank" title="LM380 Audio Amplifier Circuits"><img alt="LM380 Audio Amplifier Circuits" border="0" src="http://schematics.circuitdiagram.net/thumbs/cqs1333701538r.jpg" /></a></div>
<br />
<br />
The the above amplifier circuit shows the LM380 in non-inverting mode, with the inverting input left open (the inverting input may also be tied to ground, either directly or through a resistor or capacitor). C2 is used to decouple Vcc from ground. The optional RC circuit at the output (pin 8) is used for added stability, for example, to remove/reduce oscillations in an RF-sensitive application.<br />
<a name='more'></a><br />
How to make the circuit can have a variable gain..? It's very easy, just add a potentiometer across the inputs of the LM380 (pin 2 and pin 6). Rv can be varied to modify the gain of the <a href="http://amplifier-circuit.blogspot.com/">audio amplifier</a>. Look at to the following <a href="http://circuitdiagram.net/" target="_blank" title="electronic circuit design">circuit design</a>:<br />
<br />
<div style="text-align: center;">
<a href="http://schematics.circuitdiagram.net/viewer.php?id=viu1333701616l.jpg" rel="nofollow" target="_blank" title="LM380 Audio Amplifier Circuit diagram"><img alt="LM380 Audio Amplifier Circuit diagram" border="0" src="http://schematics.circuitdiagram.net/thumbs/viu1333701616l.jpg" /></a></div>schematic diagramhttp://www.blogger.com/profile/10351645467260086674noreply@blogger.com0tag:blogger.com,1999:blog-8406684513317645724.post-22382567195301408962012-03-15T01:56:00.000-07:002012-03-15T01:56:48.132-07:00150W Car Amplifier based LA47536<div style="text-align: center;">
<a href="http://schematics.circuitdiagram.net/viewer.php?id=bfi1331801120y.jpg" rel="nofollow" target="_blank" title="150W Car Amplifier based LA47536"><img alt="150W Car Amplifier based LA47536 circuit diagram" border="0" src="http://schematics.circuitdiagram.net/thumbs/bfi1331801120y.jpg" /></a></div>
<br />
Here the 150W car amplifier circuit, build based LA47536 power IC. The LF353 which is manufactured by National Semiconductor, will split audio signal into three bands. While, the power IC LA47536 of SANYO will boost these signals. In stereo mode, we shall have the action of eight high speakers who are going to create a very important sound pressure.<br />
<a name='more'></a><br />
<div style="text-align: center;">
<br />
The above circuit is the audio signal splitter, while the following circuit is the main power amplifier <a href="http://circuitdiagram.net/" target="_blank" title="electronic design diagram">design diagram</a>:<br />
<br />
<a href="http://schematics.circuitdiagram.net/viewer.php?id=klz1331801302n.jpg" rel="nofollow" target="_blank" title="150W Car Amplifier based LA47536 schematic diagram"><img alt="150W Car Amplifier based LA47536 diagram" border="0" src="http://schematics.circuitdiagram.net/thumbs/klz1331801302n.jpg" /></a></div>
<br />
The LA47536 is a 4-channel BTL power amplifier IC developed for use in car audio systems. The output stage features:<br />
<br />
<ul>
<li>A pure complimentary structure that uses V-PNP transistors on the high side and NPN transistors on the low side to provide high power and superb audio quality.</li>
<li>The LA47536 includes almost all the functions required for car audio use, including a standby switch, a muting function, and each protection circuit. It also provides a self-diagnosis function (output offset detection). (Sanyo) </li>
</ul>
<br />
For detailed explanation about this power <a href="http://amplifier-circuit.blogspot.com/">audio amplifier</a>, please visit <a href="http://www.zen22142.zen.co.uk/Circuits/Audio/150wmp3.htm" rel="nofollow">this page</a>.schematic diagramhttp://www.blogger.com/profile/10351645467260086674noreply@blogger.com1tag:blogger.com,1999:blog-8406684513317645724.post-87089951750384240622012-02-27T15:24:00.000-08:002012-02-27T15:24:59.158-08:0032W HiFi Audio Amplifier Circuit based TDA2050<div style="text-align: center;">
<a href="http://schematics.circuitdiagram.net/viewer.php?id=viu1330383769d.jpg" rel="nofollow" target="_blank" title="32W HiFi Audio Amplifier Circuit based TDA2050"><img alt="32W HiFi Audio Amplifier Circuit based TDA2050" border="0" src="http://schematics.circuitdiagram.net/thumbs/viu1330383769d.jpg" /></a></div>
<br />
This is the very simple and easy build schematic diagram of 32W HiFi audio amplifier circuit based single power chip TDA2050. The TDA2050 can be work with single power supply or split power supply, but on the above circuit design, it use split power supply to work. A TDA2050 must be mounted on the heatsink to prevent overheat and keep good performance.<br />
<a name='more'></a><br />
<b>TDA2050 has the following features:</b><br />
<ul>
<li>High output power (50W music power IEC 268.3 rules)</li>
<li>High operating supply voltage (50V)</li>
<li>very low distortion</li>
<li>Thermal shutdown</li>
<li>Short circuit protection (out to GND)</li>
<li>Can operated with single or split <a href="http://powersupply88.com/" target="_blank" title="power supply circuit">power supply</a></li>
</ul>
<br />
<b>PCB design:</b><br />
<div style="text-align: center;">
<a href="http://schematics.circuitdiagram.net/viewer.php?id=opt1330383823v.jpg" rel="nofollow" target="_blank" title="PCB layout for 32W HiFi Audio Amplifier Circuit based TDA2050"><img alt="PCB desig for 32W HiFi Audio Amplifier Circuit based TDA2050" border="0" src="http://schematics.circuitdiagram.net/thumbs/opt1330383823v.jpg" /></a></div>
<br />
If you're seriously want to build this 32W HiFi <a href="http://amplifier-circuit.blogspot.com/">audio amplifier</a> circuit, just use these reference:<br />
1. <a href="http://diyaudioprojects.com/Chip/DIY-TDA2050-Hi-Fi-Chip-Amplifier/" rel="nofollow" target="_blank">DIY TDA2050 amplifier project</a><br />
2. <a href="http://downloads.circuitdiagram.net/dll/thz3az" rel="nofollow" target="_blank">Download TDA2050 datasheet</a>schematic diagramhttp://www.blogger.com/profile/10351645467260086674noreply@blogger.com0tag:blogger.com,1999:blog-8406684513317645724.post-7581176716847706722012-02-20T04:09:00.000-08:002012-02-20T04:09:31.283-08:004W Audio Amplifier based TDA1013B<div style="text-align: center;">
<a href="http://schematics.circuitdiagram.net/viewer.php?id=opt1329736307l.jpg" rel="nofollow" target="_blank" title="4W Audio Amplifier based TDA1013B"><img alt="4W Audio Amplifier based TDA1013B" border="0" src="http://schematics.circuitdiagram.net/thumbs/opt1329736307l.jpg" /></a></div>
<br />
This is the scheme diagram of 4W audio amplifier built based single power chip TDA1013B. This is a mono amplifier circuit, so you need to build two similar circuit to make it stereo. 18V DC power supply with at least 0.5A current is recommended for this circuit.<br />
<a name='more'></a><br />
The TDA1013B is an integrated audio amplifier circuit with DC volume control, encapsulated in a 9-lead single in-line (SIL) plastic package. The wide supply voltage range makes this circuit ideal for applications in mains and battery-fed apparatus such as television receivers and record players.<br />
<br />
The DC volume control stage has a logarithmic control characteristic with a range of more than 80 dB; control is by means of a DC voltage variable between 2 and 6.5 V.<br />
<br />
This <a href="http://amplifier-circuit.blogspot.com/" title="audio amplifier circuit">audio amplifier</a> circuit has a well defined open loop gain and a fixed integrated closed loop. TDA1013B requires only several external <a href="http://electropart.info/" target="_blank" title="electronic components">components</a> and offers stability and performance.<br />
<br />
<b>TDA1013B Features:</b><br />
<ul>
<li>Few external components</li>
<li>Wide control range</li>
<li>Wide supply voltage range</li>
<li>Pin compatible with TDA1013A</li>
<li>High signal-to-noise ratio</li>
<li>Thermal protection</li>
<li>Fixed gain</li>
</ul>schematic diagramhttp://www.blogger.com/profile/10351645467260086674noreply@blogger.com0tag:blogger.com,1999:blog-8406684513317645724.post-5893869702023646942012-02-14T20:29:00.000-08:002012-02-14T20:29:11.883-08:00Mini Audio Amplifier with Transistors<div style="text-align: center;">
<a href="http://schematics.circuitdiagram.net/viewer.php?id=klz1329278185y.jpg" rel="nofollow" target="_blank" title="Mini Audio Amplifier with Transistors schematic diagram"><img alt="Mini Audio Amplifier with Transistors circuit diagram" border="0" src="http://schematics.circuitdiagram.net/thumbs/klz1329278185y.jpg" /></a></div>
<br />
This is the mini <a href="http://amplifier-circuit.blogspot.com/">audio amplifier</a> which built using inexpensive transistors. The circuit is quite simple, low-cost and it consumes very low energy to work. It will work with 3V battery / power supply circuit<br />
<br />
<b>How the Circuit Operates:</b><br />
<br />
The output is push-pull and needs lower than 3mA (without any signal) but drives the earpiece to a very loud level when audio is detected. The entire circuit is DC coupled and this makes it really challenging to set up.<br />
<a name='more'></a><br />
Generally you don't know where to start with the biasing in this <a href="http://amplifiercircuit.net/" target="_blank" title="amplifier circuit diagram">amplifier circuit</a>. The two most crucial parts are 8k2 between the emitter of the first transistor and 0v rail and the 470R resistor. The 8k2 across the 47uF sets the emitter voltage on the BC547 and this turns it on. The collector is directly joined to the base of a BC557, known as the driver transistor. Both these transistors are now activated and the output of the BC557 causes current to flow via the 1k and 470R resistors so that the voltage produced across each resistor activates the two output transistors. The end result is mid-rail voltage on the join of the two emitters.<br />
<br />
The 8k2 feedback resistor gives significant negative feedback whilst the 330p avoids high-frequency oscillations happening.schematic diagramhttp://www.blogger.com/profile/10351645467260086674noreply@blogger.com0tag:blogger.com,1999:blog-8406684513317645724.post-89180662882339328002012-02-10T22:32:00.000-08:002012-02-10T22:32:04.864-08:0012W MOSFET Audio Amplifier 2SK135 / 2SJ50<div style="text-align: center;">
<a href="http://schematics.circuitdiagram.net/viewer.php?id=klz1328941229f.png" rel="nofollow" target="_blank" title="12W MOSFET Audio Amplifier 2SK135 / 2SJ50 schematic diagram"><img alt="12W MOSFET Audio Amplifier 2SK135 / 2SJ50 circuit diagram" border="0" src="http://schematics.circuitdiagram.net/thumbs/klz1328941229f.png" /></a></div>
<br />
Here the 12W MOSFET audio amplifier circuit build based FET component of 2SK135 / 2SJ50. This is a small power amplifier, but capable on delivering very good sound quality. It combines an high quality op-amp IC (NE5534), which has the ability to drive low loads, high speed, low distortion transistor technology with two V-MOSFET in the output.<br />
<a name='more'></a><br />
You can replace the IC1, with another match op-amp IC and increase the voltage/power in the output stage. Please be careful to maintain the <a href="http://powersupply88.com/" target="_blank" title="power supply circuit">power supply</a> voltage of IC1 levels of specification, achieving increased power output. For stereo application, you should build two similar circuit.<br />
<br />
<b>Components List</b><br />
<table cellpadding="10"><tbody>
<tr><td>R1 = 33Kohm<br />
R2 = 6.8Kohm<br />
R3 = 22Kohm<br />
R4 = 100Kohm<br />
R5-7 = 1Kohm<br />
R6 = 330ohm<br />
R8,R11 = 10Kohm<br />
R9,R10 = 0.47ohm 2W<br />
IC1 = NE5534</td><td>C1 = 1nF/63V<br />
C2,C5 = 47uF/40V<br />
C3,C4 = 100nF/63V<br />
C6 = 4.7pF ceramic<br />
C7,C8 = 100uF/40V<br />
D1,D2 = 18V 0.5W zener<br />
D3,D4 = 1N4148<br />
Q1 = 2SK135<br />
Q2 = 2SJ50</td></tr>
</tbody></table>
<br />
<b><a href="http://amplifier-circuit.blogspot.com/">Amplifier</a> Specifications:</b><br />
<ul>
<li>Output Power : 12W in 8Ω (max) </li>
<li>Input sensivity : 3.2V rms (max) </li>
<li>T.H.D : 0.002% (1KHZ) </li>
<li>Frequency Response : DC - 100 KHZ (-3dB)</li>
</ul>
12W MOSFET audio amplifier circuit source: <a href="http://users.otenet.gr/%7EATHSAM/power_amplifier_12w_fet.htm%20" rel="nofollow" target="_blank">otenet.gr</a>schematic diagramhttp://www.blogger.com/profile/10351645467260086674noreply@blogger.com0tag:blogger.com,1999:blog-8406684513317645724.post-41771847383153720352012-02-04T01:28:00.000-08:002017-03-03T05:50:47.147-08:002x11W Stereo Audio Amplifier with LM4755<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh8-_cnOO4WU4jOSiSKtBHY1HABhK5KOCYADN9XUw3hWHbJSiNWSxZA27M1cQFUnVlA0-FV_LGtj8dYOpvbQyfrdbv_YWjG4xZp12fehuIcxhcZvnOhylSIkvJrzZFsMD3c57iNwi3vkp4/s1600/amplifier+circuit+diagram.gif" imageanchor="1" ><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh8-_cnOO4WU4jOSiSKtBHY1HABhK5KOCYADN9XUw3hWHbJSiNWSxZA27M1cQFUnVlA0-FV_LGtj8dYOpvbQyfrdbv_YWjG4xZp12fehuIcxhcZvnOhylSIkvJrzZFsMD3c57iNwi3vkp4/s320/amplifier+circuit+diagram.gif" width="320" height="271" /></a><br />
<br />
Here the circuit diagram of 2x11W stereo audio amplifier build based on single power chip LM4755 manufactured by National Semiconductor.<br />
<br />
The LM4755 is a stereo <a href="http://amplifier-circuit.blogspot.com/">audio amplifier</a> able to deliver 11W per channel of constant typical output power to a 4Ω load or 7W per channel into 8Ω applying a single 24V supply at 10% THD+N. The internal mute circuit and pre-set gain resistors present for a very economical design solution.<br />
<a name='more'></a><br />
<br />
Power output specifications at both 20V and 24V supplies and minimal external component count offer high value to consumer <a href="http://electropart.info/" target="_blank">electronic</a> manufacturers for stereo television and compact stereo devices. The LM4755 is especially intended for single supply operation.<br />
<br />
<b>LM4755 Features:</b><br />
<ul><li>Drives 4Ω and 8Ω loads</li>
<li>Integrated mute function</li>
<li>Internal Gain Resistors</li>
<li>Minimal external components needed</li>
<li>Single supply operation</li>
<li>Internal current limiting and thermal protection</li>
<li>Compact 9-lead TO-220 package</li>
<li>Wide supply range 9V - 40V</li>
</ul>Download <a href="http://downloads.circuitdiagram.net/dll/gdw5w1" rel="nofollow" target="_blank" title="download LM4755 datasheet">LM4755 datasheet</a> for your project reference.schematic diagramhttp://www.blogger.com/profile/10351645467260086674noreply@blogger.com0tag:blogger.com,1999:blog-8406684513317645724.post-86413080761685617842012-01-25T19:35:00.000-08:002017-03-03T05:49:31.715-08:002x30W Stereo Audio Amplifier based STK465This is the stereo <a href="http://amplifier-circuit.blogspot.com/">audio amplifier</a> circuit build based on well-known power chip of STK465. The STK465 has two power amplifier module, so, with single chip of STK465 you can build a stereo amplifier with two input channels and two output channels. This circuit is require split power supply, recommended supply : +/- 28V / 2A. The STK465 should be mounted on proper heatsink.<br />
<br />
<b>Schematic diagram:</b><br />
<br />
<div class="separator" style="clear: both; text-align: center;">
<a href="http://schematics.circuitdiagram.net/viewer.php?id=arx1269564555i.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img alt="2x30W Stereo Audio Amplifier based STK465 circuit" border="0" height="197" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgIRt0kNdpdbrDV2k6seqRJLH1aEhz4ef-YQ_hxMcH7WKkengUAZeUsIbuN9wOIfHftmE8VMn446ig0XwbC2QMPaSUdltcoi3UiEBjK2_eVGr6FmRKOL2qdbCcZe6JyAwpWwygSXUFvXl0/s320/amplifier+circuit.jpg" width="320" /></a></div>
<br />
<b>Component Part list:</b><br />
<table cellpadding="10"><tbody>
<tr><td>R1 = 1K<br />
C1 = 1uF/35V<br />
R2 = 3,3K<br />
C2 = 470pF<br />
R3 = 100<br />
C3 = 100uF/60V<br />
R4 = 330<br />
C4 = 100uF/60V<br />
R5 = 3,3K<br />
C5 = 10uF/60V<br />
R6 = 1K<br />
C6 = 47uF/60V</td><td>R7 = 0,33<br />
C7 = 8,2pF<br />
R8 = 33k<br />
C8 = 0,1uF<br />
R9 = 4,7<br />
C9 = 1uF/35V<br />
R10 = 1k<br />
C10 = 470pF<br />
R11 = 3,3k<br />
C11 = 100uF/60V<br />
R12 = 100<br />
C12 = 100uF/60V</td><td>R13 = 330<br />
C13 = 10uF/60V<br />
R14 = 3,3k<br />
C14 = 47uF/60V<br />
R15 = 1k<br />
C15 = 8,2pF<br />
R16 = 0,33<br />
C16 = 0,1uF<br />
R17 = 33k<br />
R18 = 4,7<br />
IC1 = STK465<br />
LS1 = Speaker 40W 8 or 4 Ohm</td></tr>
</tbody></table>
<br />
<a name='more'></a><br />
<br />
<b>PCB Layout:</b><br />
<div style="text-align: center;">
<a href="http://schematics.circuitdiagram.net/viewer.php?id=opt1269565510p.jpg" rel="nofollow" target="_blank" title="2x30W Stereo Audio Amplifier based STK465 pcb layout"><img alt="2x30W Stereo Audio Amplifier based STK465 circuit" border="0" class="aligncenter" src="http://schematics.circuitdiagram.net/thumbs/opt1269565510p.jpg" title="2x30W Stereo Audio Amplifier based STK465 schematic diagram" /></a></div>
<br />
<b>Components placement:</b><br />
<br />
<div class="separator" style="clear: both; text-align: center;">
<a href="https://www.blogger.com/blogger.g?blogID=8406684513317645724" http:="" id="bfi1269564690g.jpg" imageanchor="1" schematics.circuitdiagram.net="" style="margin-left: 1em; margin-right: 1em;" viewer.php=""><img alt="2x30W Stereo Audio Amplifier based STK465 circuit" border="0" height="195" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiTboZYOenSpVGzYwjvZUHblpGSLbibCV-aZN84GiAC4oq36XH3rFPhyphenhyphenIyBZu96xvOxC2H0BjVB53d0LPivAEXjLKUQnIUGu_Ht0nL8pO3HJoJjg5KdSK_o9qQiyGFibHdyTelKxSoV-E8/s320/amplifier+circuit+stk465.jpg" width="320" /></a></div>
<br />
Download <b><a href="http://downloads.circuitdiagram.net/dll/i2hjht" rel="nofollow" target="_blank">STK465 datasheet.</a></b>schematic diagramhttp://www.blogger.com/profile/10351645467260086674noreply@blogger.com0tag:blogger.com,1999:blog-8406684513317645724.post-46089902845678479642012-01-17T19:42:00.000-08:002012-01-17T19:42:58.271-08:00Stereo Power Amplifier 120W based STK4241V<div style="text-align: center;">
<a href="http://schematics.circuitdiagram.net/viewer.php?id=viu1326856948z.gif" rel="external nofollow" target="_blank" title="Stereo Power Amplifier 120W based STK4241V"><img alt="Stereo Power Amplifier 120W based STK4241V" border="0" src="http://schematics.circuitdiagram.net/thumbs/viu1326856948z.gif" /></a></div>
<br />
This is the circuit diagram of stereo power amplifier which use STK4241V as the main component. The amplifier will give you audio power output up to 120W on each channel if you use optimum power supply.<br />
<br />
<b>STK4241V features:</b><br />
<ul>
<li>Muting circuit built-in to isolate all types of shock noise</li>
<li>Current mirror circuit for low 0.08% total harmonic distortion</li>
</ul>
<a name='more'></a><br />
<b>Components list:</b><br />
<br />
R1, R24 = 1K / 0.125W<br />
R2, R5, R21, R23 = 56K / 0.125W<br />
R6, R22 = 560 ohm / 0.125W<br />
R7, R18 = 4.7K / 0.25W<br />
R8, R19 = 4.7K / 0.5K<br />
R9, R10 = 1K / 0.5W<br />
C1, C19 = 2.2uF/50V<br />
C2, C20 = 470pF ceramic 50V<br />
C4, C10, C13 = 10uF/63V<br />
C5, C15 = 1uF/63V<br />
C6, C16 = 1nF/100V<br />
C7, C17 = 3pF ceramic<br />
C8, C18 = 100uF/16V<br />
C9, C14 = 47uF/63V<br />
C11, C12 = 100nF/100V<br />
<br />
PCB layout design for 120W stereo power <a href="http://amplifier-circuit.blogspot.com/">audio amplifier</a>:<br />
<br />
<div style="text-align: center;">
<a href="http://schematics.circuitdiagram.net/viewer.php?id=jdv1326857277q.gif" rel="external nofollow" target="_blank" title="PCB design for Stereo Power Amplifier 120W based STK4241V"><img alt="PCB design for Stereo Power Amplifier 120W based STK4241V" border="0" src="http://schematics.circuitdiagram.net/thumbs/jdv1326857277q.gif" /></a></div>
<br />
<b>STK4241V power IC:</b><br />
<br />
<div style="text-align: center;">
<a href="http://schematics.circuitdiagram.net/viewer.php?id=cqs1326857302n.gif" rel="external nofollow" target="_blank" title="STK4241V power IC"><img alt="STK4241V power IC" border="0" src="http://schematics.circuitdiagram.net/thumbs/cqs1326857302n.gif" /></a></div>
<br />
The circuit need split power supply to work. Here the <a href="http://powersupply88.com/" target="_blank">power supply circuit</a> for 120W stereo power amplifier:<br />
<br />
<div style="text-align: center;">
<a href="http://schematics.circuitdiagram.net/viewer.php?id=bfi1326857319a.gif" rel="external nofollow" target="_blank" title="power supply for Stereo Power Amplifier 120W based STK4241V"><img alt="power supply for Stereo Power Amplifier 120W based STK4241V" border="0" src="http://schematics.circuitdiagram.net/thumbs/bfi1326857319a.gif" /></a></div>
<br />
The maximum supply voltage is ±70V with recommended supply ±54. Then minimum of 5A transformer should be used for the power supply.schematic diagramhttp://www.blogger.com/profile/10351645467260086674noreply@blogger.com0tag:blogger.com,1999:blog-8406684513317645724.post-44067177177162590282012-01-12T14:56:00.000-08:002012-01-12T14:56:16.134-08:003W Class D Audio Amplifier with LM48511<div style="text-align: center;">
<a href="http://schematics.circuitdiagram.net/viewer.php?id=cqs1326405431r.gif" rel="external nofollow" target="_blank" title="3W Class D Audio Amplifier with LM48511"><img alt="3W Class D Audio Amplifier with LM48511" border="0" src="http://schematics.circuitdiagram.net/thumbs/cqs1326405431r.gif" /></a></div>
<br />
This is the 3W Class-D audio amplifier circuit build using power IC LM48511 manufactured by National Semiconductor. The circuit is very simple with a few external components. The 3W Class D amplifier features a low noise PWM architecture that eliminates the output filter, reducing external component count, board area consumption, system cost, and simplifying design. A selectable spread spectrum modulation scheme suppresses RF emissions, further minimize the requirement for output filters. <br />
<a name='more'></a><br />
The LM48511 can be applied for use in portable devices, such as GPS, mobile phones, and MP3 players. The high, 80% efficiency at 5V, extends battery life when compared to Boosted Class AB amplifiers. Independent regulator and <a href="http://amplifier-circuit.blogspot.com/">amplifier</a> shutdown controls optimize power savings by disabling the regulator when high output power is not required. <br />
<br />
<b>LM48511 Features:</b><br />
<ul>
<li>Selectable spread spectrum mode reduces EMI</li>
<li>3W Output into 8Ω at 5V with THD+N = 1%</li>
<li>80% Efficiency</li>
<li>Dynamically Selectable Regulator Output Voltages</li>
<li>Independent Regulator and Amplifier Shutdown Controls</li>
<li>Filterless Class D</li>
<li>Only need 3.0V – 5.5V <a href="http://powersupply88.com/" target="_blank" title="power supply circuit">power supply</a> for operation</li>
<li>Low Shutdown Current</li>
<li>Click and Pop Suppression </li>
</ul>
<br />
Download LM48511 datasheet for your project reference: <a href="http://downloads.circuitdiagram.net/dll/k1izjn" rel="external nofollow" target="_blank" title="download LM48511 datasheet">download here</a>schematic diagramhttp://www.blogger.com/profile/10351645467260086674noreply@blogger.com0tag:blogger.com,1999:blog-8406684513317645724.post-71161454992001367742012-01-04T14:20:00.000-08:002012-01-04T14:20:52.592-08:00Low Impedance Mic Preamplifier using TL081<div style="text-align: center;">
<a href="http://schematics.circuitdiagram.net/viewer.php?id=viu1325714082v.jpg" rel="nofollow" target="_blank" title="Low Impedance Mic Preamplifier using TL081"><img alt="Low Impedance Mic Preamplifier Circuit using TL081" border="0" src="http://schematics.circuitdiagram.net/thumbs/viu1325714082v.jpg" /></a></div>
<br />
This is the circuit diagram of low impedance mic preamplifier built based TL081. The circuit is for use with low impedance (~200 ohm) microphones. It will work with stabilized voltages between 6-30VDC. If you don't build the impedance adapter part with T1, you get a mic preamp for higher impedance microphones. In this case, you should directly connect the signal to C7.<br />
<a name='more'></a><br />
<b>Components List:</b><br />
<br />
<table border="0" cellpadding="0" cellspacing="0"><tbody>
<tr><td width="180"></td> <td width="10"></td> <td width="180"></td> <td width="10"></td> <td width="180"></td> </tr>
<tr> <td width="180">R1 = 15k</td> <td width="10"></td> <td width="180">C1 = 3k9</td> <td width="10"></td> <td width="180">U1 = TL081</td> </tr>
<tr> <td width="180">R2 = 150k</td> <td width="10"></td> <td width="180">C2 = 100u</td> <td width="10"></td> <td width="180">D1 = 1N4148</td> </tr>
<tr> <td width="180">R3 = 2k2</td> <td width="10"></td> <td width="180">C3 = 22u</td> <td width="10"></td> <td width="180">CN1 = SIL6</td> </tr>
<tr> <td width="180">R4 = 820</td> <td width="10"></td> <td width="180">C4 = 4u7</td> <td width="10"></td> <td width="180"></td> </tr>
<tr> <td width="180">R6 = 10k</td> <td width="10"></td> <td width="180">C5 = 470u</td> <td width="10"></td> <td width="180"></td> </tr>
<tr> <td width="180">R7 = 10k</td> <td width="10"></td> <td width="180">C6 = 10u</td> <td width="10"></td> <td width="180"></td> </tr>
<tr> <td width="180">P1 = 1M</td> <td width="10"></td> <td width="180">C7 = 100n</td> <td width="10"></td> <td width="180"></td> </tr>
<tr> <td width="180"></td> <td width="10"></td> <td width="180">C8 = 47u UNIPOLAR</td> <td width="10"></td> <td width="200"></td></tr>
</tbody></table>
<br />
<b>Bottom PCB Layout (chopper side):</b><br />
<div style="text-align: center;">
<a href="http://schematics.circuitdiagram.net/viewer.php?id=viu1325714416s.jpg" rel="nofollow" target="_blank" title="Low Impedance Mic Preamplifier using TL081 PCB layout"><img alt="Low Impedance Mic Preamplifier using TL081 PCB layout" border="0" src="http://schematics.circuitdiagram.net/thumbs/viu1325714416s.jpg" /></a></div>
<br />
<b>Top PCB Layout (<a href="http://electropart.info/" target="_blank">components</a> side):</b><br />
<div style="text-align: center;">
<a href="http://schematics.circuitdiagram.net/viewer.php?id=viu1325714476r.jpg" rel="nofollow" target="_blank" title="Low Impedance Mic Preamplifier using TL081 component layout"><img alt="Low Impedance Mic Preamplifier using TL081 top pcb layout" border="0" src="http://schematics.circuitdiagram.net/thumbs/viu1325714476r.jpg" /></a></div>schematic diagramhttp://www.blogger.com/profile/10351645467260086674noreply@blogger.com0tag:blogger.com,1999:blog-8406684513317645724.post-55155208025250219692011-12-26T17:34:00.000-08:002011-12-26T17:34:49.329-08:0030W Audio Power Amplifier<div style="text-align: center;">
<a href="http://schematics.circuitdiagram.net/viewer.php?id=arx1324937010v.jpg" rel="external nofollow" target="_blank" title="30W Audio Power Amplifier schematic diagram"><img alt="30W Audio Power Amplifier circuit diagram" border="0" src="http://schematics.circuitdiagram.net/thumbs/arx1324937010v.jpg" /></a></div>
<br />
Here the 30W audio <a href="http://amplifier-circuit.blogspot.com/">amplifier circuit</a> for you who need a low power amplifier, but has good audio output quality and made from distinct components. The circuit design does not have any innovation. In the power stage is a Darlington pair of transistors packed TOP3, which can be screwed onto a heatsink, adding between them and the heatsink suitable leaves mica and ointment silicone for better dissipation of temperature. <br />
<br />
<a name='more'></a><br />
The bias current regulation becomes with TR1, as follows. Place the ends of the resistors R20 and R21 terminals a multimeter 200mV scale and TR1 regulate late to get an indication 12mV. This voltage drop corresponds to a quiescent current 30mA. Allow the <a href="http://amplifiercircuit.net/" target="_blank">amplifier</a> in this setting for 15 minutes without input signal and check again. If necessary correct the setting at 30mA.<br />
<br />
<b>Parts List:</b><br />
<table border="0" cellpadding="15"><tbody>
<tr><td>R1 = 1Kohm<br />
R2 = 47Kohm<br />
R3 = 1.5Kohm<br />
R4,R5 = 10Kohm<br />
R6 = 5.6Kohm<br />
R7 = 10ohm<br />
R8 = 47Kohm<br />
R9 = 560ohm<br />
R10,R11 = 8.2Kohm<br />
R12,R15 = 120ohm<br />
R13 = 680ohm<br />
R14 = 330ohm<br />
R16,R17 = 270ohm<br />
R18 = 22ohm 1W</td><td>R19 = NC<br />
R20,R21 = 0.39ohm 4W<br />
TR1 = 250ohm trimmer<br />
C1 = 470nF<br />
C2 = 1nF<br />
C3 = 68pF<br />
C4,C8 = 22nF<br />
C5,C6,C7 = 100nF<br />
C9 = 47uF/25V<br />
C10,C11 = 220uF/63V<br />
D1 = 9.1V 0.4W zener<br />
D2,D3 = 1N4148<br />
Q1,Q2 = BC550C<br />
Q3 = MPSA56</td></tr>
</tbody></table>
<br />
<b>30W <a href="http://audio-circuits.blogspot.com/" target="_blank">Audio</a> Power Amplifier Top PCB Layout:</b><br />
<br />
<div style="text-align: center;">
<a href="http://schematics.circuitdiagram.net/viewer.php?id=opt1324936979p.jpg" rel="external nofollow" target="_blank" title="30W Audio Power Amplifier Top PCB Design"><img alt="30W Audio Power Amplifier Top PCB Layout" border="0" src="http://schematics.circuitdiagram.net/thumbs/opt1324936979p.jpg" /></a></div>
<br />
<b>30W Audio Power Amplifier Bottom PCB Layout:</b><br />
<br />
<div style="text-align: center;">
<a href="http://schematics.circuitdiagram.net/viewer.php?id=rgh1324936942x.jpg" rel="external nofollow" target="_blank" title="30W Audio Power Amplifier Bottom PCB Design"><img alt="30W Audio Power Amplifier Bottom PCB Layout" border="0" src="http://schematics.circuitdiagram.net/thumbs/rgh1324936942x.jpg" /></a></div>schematic diagramhttp://www.blogger.com/profile/10351645467260086674noreply@blogger.com0tag:blogger.com,1999:blog-8406684513317645724.post-17013146051568177272011-12-19T01:36:00.000-08:002011-12-19T01:36:23.246-08:0050W Audio Power Amplifier based ICL8063<div style="text-align: center;">
<a href="http://schematics.circuitdiagram.net/viewer.php?id=bwy1324286623h.jpg" rel="external nofollow" target="_blank" title="50W Audio Power Amplifier based ICL8063 schematic diagram"><img alt="50W Audio Power Amplifier based ICL8063 circuit diagram" border="0" src="http://schematics.circuitdiagram.net/thumbs/bwy1324286623h.jpg" /></a></div>
<br />
This is the 50W audio power amplifier for general purpose application. The circuit is based ICL8063 and 2N3055/2N3791 power transistor . The amplifier has an input for a radio, TV, stereo or other line level devices. It also has a phono input for a record player, guitar, microphone or other un-amplified source. With the addition of a low pass filter at the input, it makes a great amplifier for a small subwoofer.<br />
<br />
<a name='more'></a>The <a href="http://powersupply88.com/" target="_blank">power supply</a> is already designed on above schematic diagram. It is a splitted / dual polarity power supply. Maintain the power supply output at +35V / 0 / -35V since the supply recommendation for ICL8063 is 35V.<br /><br />
<br />
ICL8063 is a unique monolithic power transistor driver amplifier that allows construction minimum chip <a href="http://amplifier-circuit.blogspot.com/">power amplifier</a> systems. includes built safe operating area circuitry, short circuit protection voltage regulators, primarily intended for driving complementary output stages<br />
<br />
<b>Parts List:</b><br />
R1 ....................... 200 Ohm 1/4 W Resistor<br />
R2 ....................... 200K 1/4 W Resistor<br />
R3 ....................... 30K 1/4 W Resistor<br />
R5 ....................... 1K 1/4 W Resistor<br />
R6 ....................... 5K 1/4 W Resistor<br />
R7,R10 ............... 1 Meg (5%) 1/2 W Resistor<br />
R8,R9 ................. 0.4 Ohm 5 W Resistor<br />
R11 ..................... 10K Pot<br />
R12,R13 ............. 51K 1/4 W Resistor<br />
R14 ..................... 47K 1/4 W Resistor<br />
C1 ....................... 100uF 35V Electrolytic Capacitor<br />
C2 ....................... 0.011uF Capacitor<br />
C3 ....................... 3750pF Capacitor<br />
C4,C6 ................. 1000pF Capacitor<br />
C5,C7,C8 ........... 0.001uF Capacitor<br />
C9 ....................... 50pF Capacitor<br />
C10 ..................... 0.3uF Capacitor<br />
C11,C12 ............. 10,000uF 50V Electrolytic Capacitor<br />
U1,U2 ................. 741 Op Amp<br />
U3 ....................... ICL8063 Audio Amp Transister Driver thingy<br />
Q1 ....................... 2N3055 NPN Power Transistor<br />
Q2 ....................... 2N3791 PNP Power Transistor<br />
BR1 .................... 250 V 6 Amp Bridge Rectifier<br />
T1 ....................... 50V Center Tapped 5 Amp Transformer<br />
S1 ....................... SPST 3 Amp Switch<br />
S2 ....................... DPDT Switch<br />
F1 ....................... 2 Amp Fuse<br />
SPKR1 ................ 8 Ohm 50W Speaker<br />
MISC ................... Case, Knobs, Line Cord, Binding Posts Or Phono Plugs (For Input And Output), Heatsinks For Q1 And Q2<br />
<br />
50W Audio Power Amplifier based ICL8063 and 2N3055/2N3791schematic diagramhttp://www.blogger.com/profile/10351645467260086674noreply@blogger.com0tag:blogger.com,1999:blog-8406684513317645724.post-67206259404558062222011-11-22T22:40:00.001-08:002011-11-23T14:19:45.908-08:0060W Class-A Power Amplifier Circuit<div style="text-align: center;">
<a href="http://schematics.circuitdiagram.net/viewer.php?id=jdv1322030353h.gif" rel="external nofollow" target="_blank" title="60W Class-A Power Amplifier Circuit diagram"><img alt="60W Class-A Power Amplifier Circuit diagram" border="0" src="http://schematics.circuitdiagram.net/thumbs/jdv1322030353h.gif" /></a></div>
<br />
The circuit shows that each sub-amplifier consists of two stages of voltage gain. The first stage consists of two complementary stages in common emitter connection [Q1-7], whose profit is x2.3. The second stage is a current mirror stage [Q13-14] has load resistor that goes to 0V. The gain of this stage is x200. Consequently, the overall open-loop voltage gain is about x460 and so, since the closed loop gain is x26.7, the reduction due to negative feedback is x17.2 or 24db. <br />
<br />
<a name='more'></a><br />
<br />
The input amplifiers are supplied with ± 15V from combinations of voltage regulators resistor-diode zener, R14-D1 and R21-D2. The current of the first stage [Q1] is 0.36mA [360], provided through a <a href="http://circuitdiagram.net/" target="_blank">circuit</a> "floats" [Q2-3], which provides simultaneous and necessary [and heat] stability at this stage. The gain of this stage is determined by the emitter resistor R6, which provides local negative feedback. <br />
<br />
The second stage [Q4] is like a load of wiring cascode [Q5-6], the first has its base connected to 0V and the second is connected to the base line 15V. Consequently, minimizing the maximum variation of voltage in the collector's Q4, thereby reducing the capacity between the base-collector [phenomenon Miller], so that would reduce the bandwidth at high frequencies. The presence of Q5 and Q6 improves the bandwidth and linearity. As load Q6, is the second half [Q12] Current mirror and simulating as resistor in series with a properly biased diode. The next step after the mirror is a common emitter stage [Q16-17], which is a simple voltage <a href="http://amplifier-circuit.blogspot.com/" target="_blank">amplifier</a>.<br />
<br />
Detailed information and explanation about this 60W Class-A power amplifier circuit, visit <a href="http://users.otenet.gr/%7Eathsam/Power_amplifier_60w_Class_A_Eng.htm" rel="external nofollow" target="_blank">this page</a>schematic diagramhttp://www.blogger.com/profile/10351645467260086674noreply@blogger.com0tag:blogger.com,1999:blog-8406684513317645724.post-43124756037608339212011-11-11T16:29:00.000-08:002011-11-12T01:02:50.240-08:00TDA7294 : 60W Power Audio Amplifier Circuit<div style="text-align: center;">
<a href="http://schematics.circuitdiagram.net/viewer.php?id=rgh1321087327p.jpg" rel="external nofollow" target="_blank" title="TDA7294 : 60W Power Audio Amplifier Circuit schematic diagram"><img alt="TDA7294 : 60W Power Audio Amplifier Circuit diagram" border="0" src="http://schematics.circuitdiagram.net/thumbs/rgh1321087327p.jpg" /></a></div>
<br />
This is the circuit diagram of 60W power audio amplifier based TDA7294. The above diagram is for single/mono amplifier only. You can build the stereo <a href="http://amplifiercircuit.net/" target="_blank" title="amplifier circuit diagram">amplifier</a> by build two similar circuit. Of course you will need to doubling the power supply too. <br />
<br />
<br />
<a name='more'></a>The TDA7294 amplifier module is a monolithic integrated circuit. It is intended for use as an audio class AB amplifier in hi-fi applications. It has a wide voltage range and output current capability, enabling it to supply the highest power into both 4 ohm and 8n ohm loads. With the addition of a handful of parts and a suitable power supply, this module will deliver 50W RMS into 8-ohm with 0.1% THD. you the user must supply a heavy duty heatsink rated at 1.4°C/W. Pin 10 is the MUTE input and pin 9 provides a STANDBY mode. Muting should always take place before standby mode is selected. Connecting these pins permanently to the supply rail (insert links) ensures that the amplifier comes on immediately on power up. Increasing the time constants R3-C6 and R4-C5 may eliminate any switch-on clicks. The IC has internal thermal protection that causes the mute to cut in at 145°C and switches the amplifier into standby at 150°C. Do not operate the module without a heatsink. The heatsink tab on the TDA7294 IC is internally connected to the negative supply rail. If the module is mounted inside an earthed metal enclosure then the IC must be insulated from the heatsink. If not, the negative supply rail will be shorted to ground.<br />
<br />
<br />
<b>60W Power Audio Amplifier part list:</b><br />
<br />
R1=180ohm <br />
R2-3-5=10Kohm <br />
R4=22Kohm <br />
R6=680ohm<br />
C1=1.5uF 63V MKT Polyester<br />
C2=2.7nF 63V MKT Polyester<br />
C3-4=100nF 100V MKT Polyester<br />
C5-6=10uF 63V Electrolytic<br />
C7=22uF 63V Electrolyti<br />
C8=33uF 25V Electrolytic<br />
C9-10=1000uF 63V Electrolytic<br />
IC1=TDA7294 on Heatsink<br />
J1=2pin connector with 2.54mm step<br />
J2=3pin connector <br />
J3=2pin connector<br />
JP1-2=2pin Jumper with 2.54mm step<br />
All Resistors is 1/4W 1%<br />
All Electrolytic Capacitors is Axial<br />
<br />
<b>Power supply circuit:</b><br />
<br />
<div style="text-align: center;">
<a href="http://schematics.circuitdiagram.net/viewer.php?id=bwy1321087439d.jpg" rel="external nofollow" target="_blank" title="Power supply for 60W Power Audio Amplifier Circuit"><img alt="Power supply for 60W Power Audio Amplifier Circuit" border="0" src="http://schematics.circuitdiagram.net/thumbs/bwy1321087439d.jpg" /></a></div>
<br />
Above <a href="http://circuitdiagram.net/" target="_blank" title="electronic circuit diagram">circuit diagram</a> is the power supply circuit for 60W amplifier. The maximum supply voltage of the IC is +/-40V. However the maximum dissipation of the IC would be exceeded when using a 4-ohm load at that voltage. Therefore the supply voltage used should be kept down to a safe +/-30V. The mains transformer used to power the module should be rated at a minimum of 80VA. If you want to run two modules in a stereo amplifier you can use a common <a href="http://powersupply88.com/" target="_blank" title="power supply circuit">power supply</a>. In this case the transformer should be rated at 150VA.<br />
<br />
<b>Power Supply parts list:</b><br />
<br />
TR1 = 230Vac//2X22Vac --> 80VA for single Amplifier<br />
TR1 = 230Vac//2X22Vac --> 150VA for stereo Amplifier<br />
C1 = 22nF 630V Polyester MKT<br />
C2....5 = 22nF 100V Polyester MKT<br />
C6-7 = 10.000uF 63V For single Amplifier<br />
C8-9 = 10.000uF 63V For dual Amplifier (no need if you build single amp only)<br />
C10-11 = 1uF 63V Polyester MKT<br />
BR1=Diode Bridge >15A<br />
F1=Fuse 0.5A slow<br />
<br />schematic diagramhttp://www.blogger.com/profile/10351645467260086674noreply@blogger.com1tag:blogger.com,1999:blog-8406684513317645724.post-6581892616259767532011-11-01T14:25:00.000-07:002011-11-12T01:03:55.083-08:00100W HiFi Power Amplifier with MOSFETThe following is the electronic project to build a 100W HiFi power <a href="http://amplifier-circuit.blogspot.com/">amplifier circuit</a> which use power MOSFETs to get the better audio quality. MOSFETs have a high input impedance at low frequencies, and are capable (when driven by a suitable source) of extremely high slew-rates. Of course this very attribute makes them rather prone to HF oscillation when improperly compensated, but with careful design they're capable of impressive intermod performance.<br />
<br />
<span style="font-weight: bold;">Circuit design of 100W HiFi Power Amplifier with MOSFET</span><br />
<div style="text-align: center;">
<a href="http://schematics.circuitdiagram.net/viewer.php?id=rgh1320182670c.jpg" rel="external nofollow" target="_blank" title="100W HiFi Power Amplifier with MOSFET"><img alt="100W HiFi Power Amplifier circuit with MOSFET" border="0" src="http://schematics.circuitdiagram.net/thumbs/rgh1320182670c.jpg" /></a></div>
<br />
<br />
<a name='more'></a><br /><br />
Active<a href="http://electropart.info/" target="_blank" title="electronic components"> components</a> substitutions:<br />
<ul>
<li> JFET input diffamp: SST404 (SO-8) can be change with ECG461.</li>
<li> Low power bipolars: MMBTA06/56 (SOT-23) can be changed with BC547/557 and BC639/640.</li>
<li> Power MOSFET drivers: 2SK1058/2SJ162 (TO-3P) can be changed with 2SK176/2SJ56 (AEM6000) or 2SK134/2SJ49 (AEM6005 and ETI5000).</li>
</ul>
<br />
<span style="font-weight: bold;">Anti-thump circuit:</span><br />
<div style="text-align: center;">
<a href="http://schematics.circuitdiagram.net/viewer.php?id=opt1320184206c.jpg" rel="external nofollow" target="_blank" title="100W HiFi Power Amplifier schematic diagram"><img alt="100W HiFi Power Amplifier circuit diagram" border="0" src="http://schematics.circuitdiagram.net/thumbs/opt1320184206c.jpg" /></a></div>
<br />
<br />
<span style="font-weight: bold;">PCB Layout:</span><br />
<div style="text-align: center;">
<a href="http://schematics.circuitdiagram.net/viewer.php?id=bfi1320184693m.jpg" rel="external nofollow" target="_blank" title="100W HiFi Power Amplifier PCB design"><img alt="100W HiFi Power Amplifier PCB layout" border="0" src="http://schematics.circuitdiagram.net/thumbs/bfi1320184693m.jpg" /></a></div>
<br />
<br />
Original source page: <a href="http://www.littlefishbicycles.com/poweramp/" rel="external nofollow" target="_blank" title="100W HiFi Power Amplifier with MOSFET">100W HiFi Power Amplifier with MOSFET</a><br />
Go to that page to get detailed project explanation.schematic diagramhttp://www.blogger.com/profile/10351645467260086674noreply@blogger.com0tag:blogger.com,1999:blog-8406684513317645724.post-70188079191081476452011-10-26T04:39:00.000-07:002011-11-12T01:04:06.340-08:0015W OTL Power Amplifier based TDA2030The following diagram is the <a href="http://circuitdiagram.net/" target="_blank" title="electronic circuit diagram">circuit diagram</a> of 15W OTL power amplifier which is build based single amplifier chip TDA2030 produced by STMicroelectronics. This circuit is very simple, the main active component was the TDA2030 while the others discrete components supposed to support the TDA2030 to work properly.<br />
<br />
15W OTL Power Amplifier <a href="http://wiringschematics.net/" target="_blank" title="electronic schematic diagram">Schematic Diagram</a>:<br />
<div style="text-align: center;">
<a href="http://schematics.circuitdiagram.net/viewer.php?id=jdv1319640694z.jpg" rel="external nofollow" target="_blank" title="15W OTL Power Amplifier based TDA2030 schematic diagram"><img alt="15W OTL Power Amplifier based TDA2030" border="0" src="http://schematics.circuitdiagram.net/thumbs/jdv1319640694z.jpg" /></a></div>
<br />
<br />
<a name='more'></a><br /><br />
15W OTL Power Amplifier PCB Layout<br />
<div style="text-align: center;">
<a href="http://schematics.circuitdiagram.net/viewer.php?id=bfi1319640775e.jpg" rel="external nofollow" target="_blank" title="free schematic diagram"><img alt="electronic circuit diagram" border="0" src="http://schematics.circuitdiagram.net/thumbs/bfi1319640775e.jpg" /></a></div>schematic diagramhttp://www.blogger.com/profile/10351645467260086674noreply@blogger.com0