| 摘要 |
PROBLEM TO BE SOLVED: To provide an ignition control circuit of an inflater capable of preventing damages to a driver provided for switching current conduction to a filament. SOLUTION: The circuit comprises a high side driver 11 provided between a backup power source 20 and the filament 30, a low side driver 12 provided between the filament 30 and a ground, current control circuits 13, 14 for controlling current flowing to the respective drivers 11, 12, current detection circuits 15, 17 for detecting the current flowing to the respective drivers 11, 12, and a conduction time control circuit 16 for driving the respective current control circuits 13, 14 based on an ignition signal and stopping the current control circuits 13, 14 if a conduction status at a predetermined current value or more continues for a predetermined period of time in either of the current detection circuits 15, 17. COPYRIGHT: (C)2009,JPO&INPIT
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