Polarity inversion protection

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01:10:57

This circuit protects the 400ohm resistance (or any load in parallel to it) from polarity inversion of the voltage source. If you change polarity to the voltage source (inverting +  with - ) you'll see that the mosfet cuts the current to the load, thereby protecting it. The zener protects the gate-source voltage from going over 10 volts (real mosfets have a limited maximum gate-source voltage).

published 12 years ago

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