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Last Updated on: Monday, July 11, 2016 02:00 PM

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More  AC Power Control Circuits    FET Circuits

CHARGE COUPLED BI-DIRECTIONAL POWER MOSFET RELAY
 

The circuit uses an inexpensive C-MOS inverter package and a few small capacitors to drive two power MOS transistors from a 12v to 15v supply. Since the coupling capacitor values used to drive the FETs are small, the leakage current from the power line into the control circuit is a tiny 4uA. Only about 1.5mA of DC is needed to turn on and off 400 watts of AC or DC power to a load.

Click on Drawing Below to view PDF version of Schematic

Circuit Charged Coupled MOSFET Relay designed by David A. Johnson, P.E. (June 3, 2000)


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