To provide a power supply circuit and a power supply device capable of suppressing an increase of consumption power.SOLUTION: A PMOS 1 is provided for switching between a feeding state of feeding power to a feeding target and a blocking state of blocking power feeding to the feeding target between an on-vehicle power supply 50 and the feeding target. A P-channel MOSFET is adopted in the PMOS 1. A first voltage application circuit 71 has a function of switching switch states of the PMOS 1. The first voltage application circuit 71 applies voltage of potential lower than that of the on-vehicle power supply 50 to a gate terminal 74 in order to switch the state of the PMOS 1 to the feeding state, and applies voltage of potential the same as that of the on-vehicle power supply 50 to the gate terminal 74 in order to switch the state of the PMOS 1 to the blocking state.SELECTED DRAWING: Figure 2

    【課題】消費電力の増大を抑えられる電源回路及び電源装置を提供する。【解決手段】PMOS1は、車載電源50と給電対象との間で、給電対象に対して給電する給電状態と給電対象に対する給電を遮断する遮断状態とを切り替えるために設けられている。PMOS1には、PチャネルMOSFETが採用されている。第1電圧印加回路71は、PMOS1のスイッチ状態を切り替える機能を有している。第1電圧印加回路71は、PMOS1の状態を給電状態に切り替えるべくゲート端子74に車載電源50よりも低電位の電圧を印加し、PMOS1の状態を遮断状態に切り替えるべくゲート端子74に車載電源50と同電位の電圧を印加する。【選択図】図2


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    Title :

    POWER SUPPLY CIRCUIT AND POWER SUPPLY DEVICE


    Additional title:

    電源回路及び電源装置


    Contributors:

    Publication date :

    2020-10-08


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / B62D MOTOR VEHICLES , Motorfahrzeuge / H03K PULSE TECHNIQUE , Impulstechnik



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