Safe-constant-current-source


Posted on Nov 12, 2012

In the circuit shown, a CMOS op amp controls the current through a p-channel HEXFET power transistor to maintain a constant voltage across RL The current is given by: 1 ~ VREF/Rl.


Safe-constant-current-source
Click here to download the full size of the above Circuit.

The advantages of this configuration are: (a) in the event of a component failure, the load current is limited by Rl; and (b) the overhead voltage needed by the op amp and the HEXFET is extremely low.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

InfraRed Jammer with 555
Balance Indicator
DTMF Receiver IC MT8870 Tester
650mA Micropower Low Noise Boost Converter with Output Disconnect
Super Oscillator Conversion
Temperature Compensation ICOMs and TCXOs
Adjustable thermostat controller circuit diagram created REF01E
P228 infrared remote control with production of energy-saving lighting



Top