Squib circuit high side ground short protection
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United States of America Patent
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Nov 17, 2020
Grant Date -
Jun 20, 2019
app pub date -
Dec 20, 2017
filing date -
Dec 20, 2017
priority date (Note) -
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Abstract
A squib driver circuit for deployment of an active safety restraint in a vehicle. The squib driver circuit may include a high side protection circuit. The high side protection circuit may include a comparator circuit to compare a voltage at a high side feed terminal to a reference voltage and activate a timer in response to the voltage at the high side feed terminal exceeding the reference voltage, the timer generating a disable signal to disable the high side driver after a predetermined period of time. The high side protection circuit may disable the high side driver after the short is detected and elapse of the predetermined period of time. The squib driver circuit may be formed on a single chip.
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