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

HF phone rig for 20-40 meter band
Infrared approach detector / sensor
Lvdt-driver-demodulator
Interfacing LCD to Atmega using two wires
Prototype: Openbench Logic Sniffer logic analyzer
Switching Voltage Regulator
An Intel 8088 Maximum Mode Single Board Computer System
A Simple Keypad Using Lin With The Mc68hc908qt/qy Mcu
Spark Transmitter Circuit
Circuit diagram of grundig 5441 tv
infrared extending IR range
Power Flashers



Top