PROBLEM TO BE SOLVED: To reduce a current flowing in a power supply switch circuit, in the power supply switch circuit which switches power feed from a vehicle battery to an electric component to an on-state on the basis that noise is generated on a line to the electric component from the vehicle battery.SOLUTION: +B-cut circuits 24, 25 have a detection part 50 which detects alternator noise N superimposed on a power supply line 15, and a switch part 60. In the switch part 60, an output from the detection part 50 is inputted to a base of an npn-type transistor 65, and a collector of the transistor 65 is connected to a base of a pnp-type transistor 66 via a resistor 64. An emitter of the transistor 66 is connected to the power supply line 15, and the collector is connected to ECUs 22, 23. The resistor 63 is connected to the base of the transistor 66 and the power supply line 15. Furthermore, a capacitor 67 is connected to the transistor 65 side (emitter side) of the resistor 64.

    【課題】車両用バッテリから電装品へのライン上にノイズが発生したことに基づいて車両用バッテリから電装品への給電をオンに切り替える電源スイッチ回路において、電源スイッチ回路に流れる電流を低減する。【解決手段】+Bカット回路24、25が、電源ライン15に重畳されたオルタネータノイズNを検波して出力する検波部50と、スイッチ部60と、を備える。スイッチ部60では、検波部50からの出力がnpn型トランジスタ65のベースに入力され、トランジスタ65のコレクタが抵抗64を介してpnp型トランジスタ66のベースに接続される。また、トランジスタ66のエミッタが電源ライン15に接続され、コレクタがECU22、23に接続される。また、抵抗63が電源ライン15とトランジスタ66のベースに接続する。また、コンデンサ67は、抵抗64のトランジスタ65側(エミッタ側)に接続される。【選択図】図2


    Access

    Download


    Export, share and cite



    Title :

    POWER SUPPLY SWITCH CIRCUIT


    Additional title:

    電源スイッチ回路


    Contributors:

    Publication date :

    2015-06-08


    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



    SWITCH CIRCUIT AND POWER SUPPLY SYSTEM

    YANO YUSUKE / TSUKAMOTO KATSUMA | European Patent Office | 2018

    Free access

    Switch circuit and power supply system

    YANO YUSUKE / TSUKAMOTO KATSUMA | European Patent Office | 2021

    Free access

    SWITCH CIRCUIT AND POWER SUPPLY SYSTEM

    YANO YUSUKE / TSUKAMOTO KATSUMA | European Patent Office | 2017

    Free access

    Electromagnetic power supply main switch control circuit

    AN PING / ZHAO CHEN / BU JUNJUN et al. | European Patent Office | 2020

    Free access

    Power supply switch, power feeding circuit and electric connection box

    MITSUI TAKAHIKO / TSUBOUCHI TATSUYA | European Patent Office | 2018

    Free access