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Negative rail PSU with LM723 and 2n3771

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fjpompeo

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lm723 power supply

Hi all,

I need a linear power supply that regulates the negative rail(-12V) using NPN power transistors like 2N3771, 2N3772, MJE802 and so on, a PNP driver (TIP32 or equivalent) and LM723(or equivalent) as the voltage regulator.

The output current may be around 10A.

Regards,

Fernando
 

2n3771 power supply

One option is to configure LM723 regulator and external power transistors in "normal" positive voltage regulator and use the output (+) rail as "new" 0V and the "former" GND rail as "new" -12V output .. see picture below ..
http://www.spaennare.se/psupply.html

Regards,
IanP
 

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