Power signal detecting system, method and a portable electronic device thereof

摘要

A power signal detecting system and method thereof are disclosed. The power signal detecting system comprises a power supply and a portable electronic device. The portable electronic device is electrically connected with the power supply to receive a power signal. The portable electronic device comprises a sensing element, a detecting module and a power management module. The sensing element is used to connect the power signal. The detecting module is electrically connected to the sensing element and is used for detecting the power signal. The power management module electrically connects to the detecting module and is used for executing a power management for the portable electronic device by identifying the power signal.