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    • 1. 发明授权
    • Power control circuit
    • 电源控制电路
    • US06820018B2
    • 2004-11-16
    • US10228522
    • 2002-08-27
    • Masato AkitayaYumiko Yamaguchi
    • Masato AkitayaYumiko Yamaguchi
    • H01H4300
    • G06F1/3203
    • Disclosed is a power control circuit utilizable in an electronic device. The power control circuit includes a power on/off switch having first and second switches; a capacitive element connected to a power section via the first switch; a first switching element connected to the power section via the second switch; a microcomputer for controlling power on/off of the first switching element; and a second switching element provided between the power section and each of the microcomputer and a predetermined circuit block. The microcomputer is programmed to control the power control circuit such that, when supplying power to the microcomputer, the microcomputer holds a power-on state of the first switching element before the first switching element is turned off because of the discharge of the electric charge, and then, when the microcomputer detects that the predetermined circuit block has not operated for a given period of time, the microcomputer turns off the first switching element.
    • 公开了一种可用于电子设备的功率控制电路。 电源控制电路包括具有第一和第二开关的电源接通/断开开关; 经由所述第一开关连接到电源部分的电容元件; 经由所述第二开关连接到所述功率部的第一开关元件; 微型计算机,用于控制第一开关元件的电源接通/断开; 以及设置在功率部分和每个微计算机之间的第二开关元件和预定的电路块。 微型计算机被编程为控制功率控制电路,使得当向微型计算机供电时,由于电荷的放电,微型计算机在第一开关元件断开之前保持第一开关元件的通电状态, 然后,当微型计算机检测到预定电路块未运行给定时间时,微型计算机关闭第一开关元件。