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:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Parallel-mode aperiodic crystal oscillator
    DIY Infrared Sensor Module using Arduino
    Phoenix From Start to End
    Ultra Small Mobile Phone Xenon Photoflash Capacitor Charger With IGBT Driver
    A simple way of phase locking microwave local oscillators
    DEMODULATOR circuit
    Efficient Fan Speed Controller
    Direct FM
    Super Fool power amplifier module
    A8902 Typical application wiring diagram
    2Y-2Y-2Y-connected three-speed motor contactor control circuit
    Which only uses the 5V power supply connection circuit



    Top