Patent ID: 9620963
Date: 2017-04-11
CPC Classifications: G06F,H02J

Claim:
1. A portable electronic device, comprising: a host generating state information according to an operating state; a power adapter coupled to the host, wherein the power adapter generates an output voltage to provide to the host; and a signal transmission interface coupled between the host and the power adapter; wherein the power adapter receives the state information via the signal transmission interface and adjusts one or both of the output voltage and efficiency for maintaining the efficiency of the output voltage of the power adapter to be larger than a default ratio to generate the output voltage according to the state information, wherein the power adapter transmits specification information to the host via the signal transmission interface, the specification information includes rated power, rated voltage, rated current and efficiency of outputting the output voltage; and when the host determines that the rated power is larger than rated required power of the host, the host generates an alerting signal; when the host determines that the rated power is smaller than the rated required power of the host, the host adjusts the operating state to reduce the required power and generates an alerting signal; and when output power of the power adapter is larger than rated power of the power adapter, the power adapter transmits an overload signal to the host via the signal transmission interface, the host adjusts the operating state to reduce the required power.