POWER SUPPLY CONTROL DEVICE, SWITCHING POWER SUPPLY, AND ELECTRONIC APPARATUS

A power supply control device includes a charge circuit, a detection circuit, and a charge control circuit. The charge circuit charges a capacitor coupled to a power supply voltage node based on a full-wave rectified voltage. The charge control circuit enables a charge mode of the charge circuit when the detection circuit detects that a power supply voltage is less than a first threshold voltage.The charge control circuit disables the charge mode when the detection circuit detects that the power supply voltage reached a second threshold voltage. The charge control circuit sets a charge capacity of the charge circuit in a second charge mode period according to a length of a first charge mode period. 电源控制装置、开关电源以及电子设备。电源控制装置包括充电电路、检测电路和充电控制电路。充电电路基于全波整流电压对与电源电压节点连接的电容器进行充电。充电控制电路在检测电路检测到电源电压低于第一阈值电压时，使充电电路的充电模式有效。充电控制电路在检测电路检测到电源电压达到第二阈值电压时，使充电模式无效。充电控制电路根据第一充电模式期间的长度来设定第二充电模式期间中的充电电路的充电能力。