Electronic device with low standby power consumption

摘要

There is provided an electronic device including a power circuit and a system circuit. The system circuit includes a processing unit and a charge-discharge device. The processing unit controls the power circuit to stop providing power to the system circuit when identifying that the electronic device enters a standby state and that a discharge voltage of the charge-discharge device is higher than a predetermined voltage thereby decreasing a standby power consumption of the electronic device.

主权项

1. An electronic device, comprising:
a power circuit, configured to provide a standby voltage and comprising a control switch configured to control output of the standby voltage; and a system circuit, comprising:
a charge-discharge device, coupled to the standby voltage and configured to output a discharge voltage;a voltage regulator, coupled to the standby voltage or the discharge voltage and configured to output an operation voltage;an AND gate coupled between the charge-discharge device and the voltage regulator, anda processing unit, coupled to the operation voltage and comprising a detection unit, wherein the detection unit is configured to detect the discharge voltage outputted by the charge-discharge device to accordingly control on/off of the control switch,wherein, when the discharge voltage is smaller than a predetermined voltage, the charge-discharge device stops providing the discharge voltage to the voltage regulator via the AND gate and the standby voltage is simultaneously provided to the voltage regulator and the charge-discharge device.