12 Volt 30 Amp PSU

Posted on Nov 4, 2012

Using a single 7812 IC voltage regulator and multiple outboard pass transistors, this power supply can deliver output load currents of up to 30 amps. The input transformer is likely to be the most expensive part of the entire project. As an alternative, a couple of 12 Volt car batteries could be used. The input voltage to the regulator must be at least several volts higher than the output voltage (12V) so that the regulator can maintain its output. If a transformer is used, then the rectifier diodes must be capable of passing a very high peak forward current, typically 100amps or more.

12 Volt 30 Amp PSU
Click here to download the full size of the above Circuit.

The 7812 IC will only pass 1 amp or less of the output current, the remainder being supplied by the outboard pass transistors. As the circuit is designed to handle loads of up to 30 amps, then six TIP2955 are wired in parallel to meet this demand. The dis

Leave Comment

characters left:

New Circuits



Popular Circuits

Peak-Reading VU Meters
9 Volt 2 Amp PSU with 78S09
Voice Operated Switch (VOX) Circuit Using LM346 For Public Address Amplifier System
Simple Analog Multiplier Circuit Using LM107
Circuit Diagram for a 12V LED Lamp
dsp sstc
subwoofer filter circuit
input output instructions 8051 assembly language
Mini stroboscope