Driver protection circuit
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United States of America Patent
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Jun 13, 1989
Grant Date -
N/A
app pub date -
May 9, 1988
filing date -
May 9, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A reverse battery and loss of positive supply voltage detector circuit includes a power field effect transistor for switching a stored inductive energy to the ground supply voltage terminal if there is a disruption in the power supply. A detector circuit senses a reversal of the supply voltage connections as would happen if the battery were connected backwards and enables the power field effect transistor for discharging a negative voltage that may have developed across an inductive load. The detector circuit further senses a loss of the positive supply voltage and enables the power field effect transistor for discharging a negative voltage that may have developed across an inductive load due to the disruption of applied power.
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