13.8V 25Amp linear power supply

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This circuit linear power supply 13.8V 25Amp, I see to in Web:
http://www.raunvis.hi.is/~matti

This is my 13.8V 25Amp power-supply. With over-current (26 Amps) and over-voltage (16 Volts) protection.
Uses fold-back current limiting.
Short circuit current is around 8 Amps.
Uses 3 (or 4, which is better) IRF150n power MOSFETs as pass transistors. LM723 can drive the MOSFETs directly.
Needs big heat-sink, 1.2 C/W for the FETS and bridge rectifier, or forced air cooling.
Yes, the MOSFETs need equalizing resistors (0.1 Ohm 5 Watt) if they are not closely matched. Short circuit current of 8 Amp must be divided between the 3 MOSFETs, as the total power dissipated is 160 Watts. Better is to use 4 MOSFETS’s to lessen the stress during short circuit.
Power supply schematic, pdf(12k)

Read More in source web:
http://www.raunvis.hi.is/~matti/TF3MA/13_8V.html
Thank you.

This entry was posted on Wednesday, August 22nd, 2007 at 11:04 pm and is filed under Power supply, high current power supply. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.