Power management device and consumer electronic product

A consumer electronic product, comprising:

• an upstream USB connector;
• a first voltage regulator, having an input end coupled to a power pin of the upstream USB connector;
• a load, having a power end coupled to an output end of the first voltage regulator;
• at least one downstream USB connector;
• at least one second voltage regulator, having an output end coupled to the at least one downstream USB connector;
• and
• a power management device, comprising:
• a memory, configured to store first power information of load characteristic information of the load and store power configuration information of a power supply device;
• and
• a controller, coupled to the memory, the first voltage regulator, and the at least one second voltage regulator, wherein
• the controller determines whether the consumer electronic product is configured with the at least one downstream USB connector according to the load characteristic information, and determines whether the at least one downstream USB connector is connected to at least one USB device of the consumer electronic device,
• when the at least one USB device is electrically connected to the at least one downstream USB connector, the controller obtains at least one power demand from the at least one USB device, the controller determines whether to change a power mode of the upstream USB connector according to a total power requirement based on a combination of the first power information and the at least one power demand, and the controller controls the at least one second voltage regulator according to the power mode of the upstream USB connector to supply power to the at least one USB device,
• wherein when the power supply device is connected to the upstream USB connector and the at least one USB device is electrically connected to the at least one downstream USB connector, the controller selects selected power configuration information from the power configuration information according to the first power information and the at least one power demand, the controller provides the selected power configuration information to the power supply device to negotiate an output power configuration of the power supply device with the power supply device to provide a main power,
• wherein the main power is supplied from the upstream USB connector to the first voltage regulator and the at least one second voltage regulator, and wherein the controller is configured to control the first voltage regulator and the at least one second voltage regulator to dynamically allocate the main power between the load and the at least one downstream USB connector.