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    • 5. 发明专利
    • Dark current reducing power supply circuit and operation method of dark current reducing power supply circuit
    • 深电流降低电源电路和降低电流降低电路的操作方法
    • JP2006304482A
    • 2006-11-02
    • JP2005122541
    • 2005-04-20
    • Nissan Motor Co Ltd日産自動車株式会社
    • YAJIMA SATOSHI
    • H02M3/00H02M3/08H02M3/137
    • PROBLEM TO BE SOLVED: To provide a dark current reducing power supply circuit and its operation method for reducing a dark current in a constant voltage circuit.
      SOLUTION: The dark current reducing power supply circuit is provided with a first sleep constant voltage circuit 2a for receiving a first voltage V1 from a main power supply 1, converting the first voltage V1 into a second voltage V2 and supplying a first load 41 with the second voltage V2, and a second sleep constant voltage circuit 2b connected to the first sleep constant voltage circuit 2a in series, receiving a third voltage V3 from the first sleep constant voltage circuit 2a, converting the third voltage V3 into a fourth voltage V4 and supplying a second load 42 with the fourth voltage V4.
      COPYRIGHT: (C)2007,JPO&INPIT
    • 要解决的问题:提供一种用于减小恒压电路中的暗电流的暗电流降低电源电路及其操作方法。 解决方案:暗电流减小电源电路设置有第一睡眠恒压电路2a,用于从主电源1接收第一电压V1,将第一电压V1转换为第二电压V2,并将第一负载 41与第二电压V2相连,第二睡眠恒压电路2b与第一睡眠恒压电路2a串联连接,从第一睡眠恒压电路2a接收第三电压V3,将第三电压V3转换成第四电压 V4并向第二负载42提供第四电压V4。 版权所有(C)2007,JPO&INPIT
    • 6. 发明专利
    • JP3333170B2
    • 2002-10-07
    • JP2000106967
    • 2000-04-07
    • H02M3/28H02M3/08H02M3/335
    • A switching power supply includes a power switch and a mode controller that provides a mode control signal having a first level associated with a normal mode of operation of the switching power supply and a second level associated with a standby mode of operation of the switching power supply. The switching power supply further includes a feedback circuit coupled to the mode controller and a switching controller coupled to the feedback circuit. The feedback circuit has a voltage controlled current source that provides a feedback current which varies in response to the mode control signal. The switching controller switches the power switch in response to the feedback current so that in the normal mode of operation the power switch switches continuously at a predetermined frequency and in the standby mode of operation the power switch is switched on and off in bursts having a predetermined frequency.