Title: On failure detection apparatus of power supply circuit
Application Number: 200610169054 Application Date: 2006.12.20
Publication Number: 1988385 Publication Date: 2007.06.27
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: H03K17/08;H02H7/20
Applicant(s) Name: Yazaki Corp. Address:
Inventor(s) Name: Ohshima Shunzou
Attorney & Agent: xiakai zhongqiang
Abstract:
    An ON failure detecting apparatus detects an ON failure of an FET T 1 of a power supply circuit which includes the FET T 1 disposed between a battery E and a load RL, and controls driving and stopping of the load RL. The ON failure detecting apparatus includes a driver circuit 1 that supplies a driving voltage VD for switching ON and OFF of the FET T 1 to a gate of the FET T 1 , a gate resistor Rg that is provided between the driver circuit 1 and a gate of the FET T 1 , and an ON failure determining circuit 11 that detects whether a voltage drop in the gate resistor Rg exceeds a predetermined value, and determines that an ON failure occurs in the FET T 1 , when the voltage drop in the gate resistor Rg exceeds the predetermined value.
Time: 10
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