Ignition control circuit with current slope detection

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United States of America Patent

PATENT NO 9920736
SERIAL NO

15012513

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Importance

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Abstract

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In a general aspect, a circuit for controlling operation of an ignition circuit including an insulated-gate bipolar transistor (IGBT) device can include a current slope detection circuit configured to detect a slope of a current in a primary winding of an ignition coil included in the ignition circuit and a driver circuit coupled with the current slope detection circuit. The current slope detection circuit can be further configured to, during charging of the ignition coil, if the detected slope is above a first limit, provide a first indication to the driver circuit; and, if the detected slope is below a second limit, provide a second indication to the driver circuit. The driver circuit can be configured to, in response to receiving the first indication or the second indication, modify operation of the ignition circuit.

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Patent Owner(s)

Patent OwnerAddress
FAIRCHILD SEMICONDUCTOR CORPORATION5005 E MCDOWELL ROAD MAILDROP A700 PHOENIX AS 85008

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Gillberg, James E Flemington, US 16 173
Tang, Qingquan Breinigsville, US 14 47

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