Author Topic: LM723 Negative Voltage Regulator - Higher currents, + Current Limiting?  (Read 5342 times)

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Offline fivefishTopic starter

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I'm trying out a 723 negative voltage regulator circuit for 1st time.

The Positive voltage regulator in datasheet shows how to set current limit.

But for their negative voltage regulator (Fig. 18), there is no provision.
How do you set current limit value in a negative regulator schematic?




 

Offline SeanB

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Re: LM723 Negative Voltage Regulator - Higher currents, + Current Limiting?
« Reply #1 on: August 02, 2015, 12:08:33 pm »
Add an external PNP transistor to operate to steal base current, just like the NPN version does. Connected between base of the pass device and emitter, like the positive version, with a sense resistor.
 


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