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Dave's Circuits
Circuits designed by David Johnson, P.E.

Master Category List - Dave's Circuits
Last Updated on: Friday, April 25, 2008 04:12 PM


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

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

AC Power Control Circuits    FET Circuits
Master Schematic Category List - David A. Johnson, P.E.
 

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