To make overcurrent protection according to a load compatible with securing of instantaneous current.SOLUTION: An overcurrent protection circuit has a threshold value generating section for changing over the overcurrent detection threshold Iocp between a first setting value IocpH and a second setting value IocpL(

    【課題】瞬時電流の確保と負荷に応じた過電流保護とを両立する。【解決手段】過電流保護回路は、閾値制御信号に応じて過電流検出閾値Iocpを第1設定値IocpHとするか第2設定値IocpL(<IocpH)とするかを切り替える閾値生成部と、過電流検出閾値Iocpが第1設定値IocpHとされているときに監視対象電流Ioが第2設定値IocpLを上回ったままマスク期間Tmaskが経過した時点で過電流検出閾値Iocpを第2設定値IocpLに切り替えるように閾値制御信号を生成する閾値制御部と、を有する。なお、閾値生成部は、過電流検出閾値Iocpを第1設定値IocpHから第2設定値IocpLに切り替える際、所定の遷移時間Ttransをかけて過電流検出閾値Iocpを徐々に引き下げていく機能を備えている。【選択図】図29


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    Title :

    OVERCURRENT PROTECTION CIRCUIT


    Additional title:

    過電流保護回路


    Contributors:

    Publication date :

    2019-03-07


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    H02H EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS , Schutzschaltungsanordnungen / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / H02M APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS , Anlagen zur Umformung von Wechselstrom in Wechselstrom, von Wechselstrom in Gleichstrom oder umgekehrt, oder von Gleichstrom in Gleichstrom und zur Verwendung in Netzen oder ähnlichen Stromversorgungssystemen / H03K PULSE TECHNIQUE , Impulstechnik



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