Patent ID: 7692403

Claim:
A power control apparatus for an electronic device, where the electronic device has a battery and a system, the power control apparatus comprising: a remote-controlled adapter, for supplying a total input current to the battery and the system; an input current detecting module, an input end thereof being connected to the output end of the remote-controlled adapter, and the output end thereof being connected to the battery and the system respectively; a first amplifier, an input end thereof being connected to another output end of the input current detecting module; a maximum total input current setting module, connected to another input end of the first amplifier, wherein the first amplifier outputs a comparing result by comparing input signals received from the input current detecting module and the maximum total input current setting module; a charge current control module, setting a maximum charge current and a minimum charge current to limit a charge current of the battery, the input end of the charge current control module being directly connected to the output end of the first amplifier, wherein the charge current control module outputs a reference signal to control the charge current of the battery according to the comparing result; and a feedback signal control module, the input end thereof being connected to the output end of the charge current control module, and the output end thereof being connected to the remote-controlled adapter; wherein the maximum total input current setting module presets a highest input current, the value of the total input current is detected by the input current detecting module, the values of the total input current and the highest total input current are compared by the first amplifier, the output voltage of the remote-controlled adapter is adjusted by the reference signal of the charge current control module through a feedback signal generated by the feedback signal control module, and so the charge current supplied to the battery is adjusted and limited to be higher than the minimum charge current.