4.
    发明专利
    失效

    公开(公告)号:JPH05252006A

    公开(公告)日:1993-09-28

    申请号:JP19823192

    申请日:1992-07-24

    Abstract: PURPOSE: To actualize the bootstrap circuit which drives a power MOS transistor(TR) with high-potential side constitution wherein the power MOS TR is able to operate with a low-level supply voltage when operating at a high switching frequency. CONSTITUTION: The bootstrap circuit for the power MOS TR of the high- potential side driving constitution includes a 1st capacitor C1 which can be charged to a 1st voltage level of the supply voltage of the power TR T1. A 2nd capacitor C2 is provided in combination with the 1st capacitor C1 so that a 1st voltage and a 2nd voltage higher than the threshold voltage of the power TR T1 can be used.

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