PROBLEM TO BE SOLVED: To enable an airbag to be driven more reliably.SOLUTION: An ECU 100 comprises: a booster circuit 110 stepping up an input power supply voltage; a backup capacitor BC charging a backup power supply in response to the stepped-up voltage stepped up by the booster circuit 110; an airbag ignition circuit 120 driving an airbag using the backup power supply charged by the backup capacitor BC as a drive power supply; and a bidirectional current limiting unit 201 limiting a charge current flowing from the booster circuit 110 to the backup capacitor BC and limiting a reverse current flowing from the backup capacitor BC to the booster circuit 110.SELECTED DRAWING: Figure 6

    【課題】より確実にエアバッグを駆動することを可能とする。【解決手段】ECU100は、入力される電源電圧を昇圧する昇圧回路110と、昇圧回路110が昇圧した昇圧電圧に応じてバックアップ電源を充電するバックアップコンデンサBCと、バックアップコンデンサBCが充電したバックアップ電源を駆動電源として、エアバッグを駆動するエアバッグ点火回路120と、昇圧回路110からバックアップコンデンサBCへ流れる充電電流を制限し、かつ、バックアップコンデンサBCから昇圧回路110へ流れる逆流電流を制限する双方向電流制限部201と、を備える、【選択図】図6


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    Title :

    AIRBAG CONTROL DEVICE AND SEMICONDUCTOR DEVICE


    Additional title:

    エアバッグ制御装置及び半導体装置


    Contributors:

    Publication date :

    2017-01-05


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    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



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