PROBLEM TO BE SOLVED: To provide a power supply controller capable of performing failure diagnosis in a state in which a power supply feeding path is cut off, to enable reduction in dark current not only at the normal time but also at the failure time.SOLUTION: A power supply controller comprises: a first power supply cut-off circuit 1 provided on a power supply feeding path 10 to an electric load 3, the first power supply cut-off circuit switching the power supply feeding path into a conduction state or a cut-off state on the basis of an ignition request signal IGN for the electric load; and a second power supply cut-off circuit 2 provided on the power supply feeding path's part between the first power supply cut-off circuit and the electric load, the second power supply cut-off circuit switching the power supply feeding path into a conduction state or a cut-off state on the basis of the ignition request signal and a voltage level of the power supply feeding path's part on the downstream side of the first power supply cut-off circuit. The second power supply cut-off circuit performs failure diagnosis when the power supply feeding path is in a cut-off state in the first power supply cut-off circuit. When the voltage level of the power supply feeding path exceeds a predetermined value, the second power supply cut-off circuit cuts off the power supply feeding path to inhibit dark current from flowing through a current path generated by a failure.SELECTED DRAWING: Figure 1
【課題】電源供給経路を遮断した状態で故障診断を行うことができ、正常時だけでなく故障時の暗電流をも低減できる電源制御装置を提供する。【解決手段】電源制御装置は、電気負荷3への電源供給経路10に設けられ、電気負荷の起動要求信号IGNに基づいて当該電源供給経路を導通状態または遮断状態に切り替える第1電源遮断回路1と、第1電源遮断回路と電気負荷との間の電源供給経路に設けられ、起動要求信号と第1電源遮断回路の下流側の電源供給経路の電圧レベルとに基づいて電源供給経路を導通状態または遮断状態に切り替える第2電源遮断回路2とを備える。第2電源遮断回路は、第1電源遮断回路で電源供給経路が遮断状態のときに故障診断を行い、電源供給経路の電圧レベルが所定値より高くなった場合に、第2電源遮断回路で電源供給経路を遮断し、故障により生成された電流経路に暗電流が流れるのを抑制する。【選択図】図1
POWER SUPPLY CONTROLLER
電源制御装置
22.03.2018
Patent
Elektronische Ressource
Japanisch
POWER SUPPLY CONTROLLER AND CONTROL METHOD FOR POWER SUPPLY CONTROLLER
Europäisches Patentamt | 2016
|