POWER SUPPLY SUPPRESSION CIRCUIT AND POWER SUPPLY

• Main Author: SUGIMOTO MOTOHIRO
• Format: Patent
• Language: English; Japanese
• Published: 08.06.2017
• Subjects: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS; CONTROL OR REGULATION THEREOF; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS; GENERATION

PROBLEM TO BE SOLVED: To provide a power supply suppression circuit which can suppress power supply to a power circuit and after, in the event of a failure of the power circuit.SOLUTION: A power supply suppression circuit includes: a latch circuit which, before the input of a fault signal indicative of a power circuit fault, outputs a power supply suppression signal indicating not to suppress power supply to the power circuit, whereas after the input of the fault signal, outputs a power supply suppression signal indicating to suppress power supply to the power circuit; a gate circuit which, when the power supply suppression signal indicating not to suppress power supply is input, outputs intact an input power on signal indicating the presence/absence of power supply to the power circuit, whereas when the power supply suppression signal indicating to suppress power supply is input, outputs a power supply instruction signal indicating to suppress power supply to the power circuit; and a power switch circuit which, when the power supply suppression signal indicating to suppress power supply is not input, supplies received power for the latch circuit to the latch circuit, whereas when the power supply suppression signal indicating to suppress power supply is input, feeds the power for the latch circuit from a built-in battery to the latch circuit.SELECTED DRAWING: Figure 1 【課題】電源回路の故障が発生した場合に、電源回路への以降の給電を抑止することができる給電抑止回路を提供する。【解決手段】電源回路の故障を示す故障信号を入力する前には電源回路への給電を抑止しないことを示す給電抑止信号を出力し、故障信号を入力した後には電源回路への給電を抑止することを示す給電抑止信号を出力するラッチ回路と、給電を抑止しないことを示す給電抑止信号を入力している場合には電源回路への給電の有無を指示する入力した電源投入信号をそのまま出力し、給電を抑止することを示す給電抑止信号を入力している場合には電源回路への給電の停止を指示する給電指示信号を出力するゲート回路と、給電を抑止することを示す給電抑止信号を入力してない場合には受電したラッチ回路用電力をラッチ回路に給電し、給電を抑止することを示す給電抑止信号を入力している場合には内蔵する電池からラッチ回路用電力をラッチ回路に給電する電源切り換え回路を備える。【選択図】 図１