Power management device and method

The invention discloses a power management device and method suitable for consumer electronic products. The power management apparatus includes a memory, a configuration channel interface circuit, anda control circuit. When a power supply device is electrically connected to a connector of a consumer electronic product, the control circuit performs a power transmission protocol conforming to the USB specification on the power supply device through a configuration channel interface circuit and a configuration channel pin of the connector so as to determine the power supply mode of the power supply device for supplying power to the consumer electronic product. When the power transmission protocol is carried out successfully, the control circuit carries out a supplier custom message protocolto the power supply device through the configuration channel interface circuit and the configuration channel pin based on at least one protocol configuration file stored in the memory so as to determine whether to change the p