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Safe Constant Current Source

Safe Constant Current Source circuit

In the above circuit diagram, a CMOS operational amplifier (op-amp) controls the current via a P-Channel HEXFET power transistor (IRF9520) to maintain a constant voltage across R1. The current is given by: 1 = VREF/R1. The benefits of this configuration are:

  • Within the event of a component failure, the load current is restricted by R1
  • The overhead voltage required by the op-amplifier and also the HEXFET IRF9520 is very low.
Safe Constant Current Source circuit
Categories: Misc, Power Electronics
Tags: electric current secure,  electronic secure,  hexfet,  IRF9520,  IRF9520 circuit,  Safe Current Source, 

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