Fault and short-circuit protected output driver
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United States of America Patent
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Feb 27, 2018
Issued Date -
N/A
app pub date -
Sep 4, 2015
filing date -
Sep 22, 2014
priority date (Note) -
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Abstract
A driver and protection circuit for driving a power switch is disclosed. The driver and protection circuit includes a fault detection block configured to detect a discrepancy between a reference drive signal and a measured voltage at a gate of the power switch. The driver and protection circuit also includes a short circuit detection block configured to detect a gate-to-source short circuit or a gate-to-drain short circuit of the power switch. The driver and protection circuit further includes a latch coupled to the fault detection block and the short circuit detection block to selectively turn off an output driver coupled to the gate of the power switch when a fault or a short circuit is detected, and wherein the latch is configured to send a diagnostic signal when the fault or the short circuit is detected.
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