Invention Grant
- Patent Title: Power supply abnormality detection circuit for on-vehicle electronic control device
- Patent Title (中): 车载电子控制装置用电源异常检测电路
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Application No.: US12267225Application Date: 2008-11-07
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Publication No.: US08018702B2Publication Date: 2011-09-13
- Inventor: Tetsuo Maeda , Masaharu Yuhara , Masahide Fujita , Michihiro Takata , Takayuki Yano , Daisuke Yase
- Applicant: Tetsuo Maeda , Masaharu Yuhara , Masahide Fujita , Michihiro Takata , Takayuki Yano , Daisuke Yase
- Applicant Address: JP Tokyo
- Assignee: Mitsubishi Electric Corporation
- Current Assignee: Mitsubishi Electric Corporation
- Current Assignee Address: JP Tokyo
- Agency: Sughrue Mion, PLLC
- Priority: JP2008-159522 20080618
- Main IPC: H02H3/00
- IPC: H02H3/00

Abstract:
The on-vehicle electronic control device includes a main power supply circuit fed with power from an on-vehicle battery through an output contact of a power supply relay and a main power supply terminal of a connector to supply a stabilized control voltage to a microprocessor. When contact failure occurs in the main power supply terminal, the main power supply circuit is fed with bypass power from the output contact through a first electrical load and a commutation diode to perform the one of the report of the abnormality and the storage of the abnormality occurrence history information. A bypass power fed state is detected when an input voltage to the main power supply circuit is lower than a power supply voltage of the on-vehicle battery.
Public/Granted literature
- US20090316320A1 POWER SUPPLY ABNORMALITY DETECTION CIRCUIT FOR ON-VEHICLE ELECTRONIC CONTROL DEVICE Public/Granted day:2009-12-24
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