12 Volt, 10 Amp Switching Power Supply

Posted on Oct 18, 2012

The switching power supply, shown in the schematic, provides 12 volts, at 10 amps, maximum, using a discrete transistor regulator with an op-amp functioning as a comparator in the feedback circuit. The supply was constructed in 1984 and is variable frequency, as opposed to the pulse width modulator (PWM) controllers used today.

12 Volt, 10 Amp Switching Power Supply
Click here to download the full size of the above Circuit.

With reference to the schematic, the front panel power-on light is not shown. There is no adjustable current limiter in this unit, although R1, R2, R3, Q2, R8, R9, C5 and Q4 set the current limit to approximately 10 amps. As you can see, the design is ver

Leave Comment

characters left:

New Circuits



Popular Circuits

40W FM transmitter with valve EL34
Mp pulse width control
Water-Level Control
Geomagnetic field detectors
Adding 1 PPS and 10MHz Outputs to the Z3801A