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Current protection circuit

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johnsonchong

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current protection circuit

I need a circuit to direct a 12-15 V power supply to another circuit which need a more stable 12V input signal

This circuit should if shorted to grounded or the current drawn from it more than 160mA should have 0V output.

I use a zener diode and three transistors with resistors to do it, but I failed.

Could any one advise on this?
 

site:edaboard.com protection

Hi
It may be usefull using your zener in positive input of a opamp & a C.C buffer after the opamp with a feedback from its Emitter to negative input of opamp(may be unity gain).


try it it may works!

bye
 

current protect circuit

you can use a swticher a good swticher
national has a lot of good swticher..

e.c lm2754
 

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