Saturday, March 28, 2015

100W Amplifier with Transistor 2N3055 and MJ2955


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.

Tuesday, November 18, 2014

2 x 15W Stereo Audio Amplifier with TDA4935


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.

Friday, June 20, 2014

80W Power Amplifier based Single Power IC LM12 / LM12CL

80W Power Audio Amplifier with LM12 circuit

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).