Semiconductor device for internal combustion engine ignition
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United States of America Patent
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Jun 8, 2021
Grant Date -
Jan 3, 2019
app pub date -
May 8, 2018
filing date -
Jun 30, 2017
priority date (Note) -
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Abstract
A semiconductor device for internal combustion engine ignition includes: a power semiconductor switching device that switches ON and OFF in accordance with a control signal provided by an external control circuit for causing a spark plug to produce sparks via an ignition coil and an external power source; an auxiliary voltage circuit that generates and applies an auxiliary voltage responsive to a collector voltage of the power semiconductor switching device to the gate of the power semiconductor switching device; and a constant current circuit that regulates current from the auxiliary voltage circuit to the gate of the power semiconductor switching device when a high-voltage surge originating from the external power source is applied to the auxiliary voltage circuit via a primary winding of the ignition coil.
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