Power Mosfet Switch

Posted on Oct 20, 2012

This solid-state switch senses and interrupts an overcurrent condition within 2 /is. II allows the circuit to float. IC

Power Mosfet Switch
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1 runs at 150 kHz and full-wave doubler D1/D2 provides 15 V to the gate of Ql. An overcurrent sensed across Rl triggers Q3, removes gate bias from Ql, and opens the circuit formed by the full-wave bridge and Ql. CI and R3 allow the circuit to handle surges.

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