Dynamic voltage compensation circuit and method thereof

A dynamic voltage compensation circuit suitable for voltage compensation between an electronic device and a multimedia device, comprising:

• a current detection unit configured to obtain, from a bus power terminal, an output current output from the electronic device to the multimedia device;
• a calculation module configured to receive the output current and an ideal reference voltage, execute a voltage compensation algorithm to calculate a predetermined output voltage based on the output current, the ideal reference voltage, and a compensation coefficient, and generate a control signal according to the predetermined output voltage;
• and
• a voltage output unit configured to receive the control signal, and to be controlled by the control signal to generate the predetermined output voltage and output the predetermined output voltage to the bus power terminal,
• wherein the calculation module includes:
• an analog-to-digital converter (ADC) configured to convert the output current into a digital output current signal;
• and
• a control unit configured to calculate an output current value according to the digital output current signal and execute the voltage compensation algorithm to calculate the predetermined output voltage according to the output current value, the ideal reference voltage and the compensation coefficient, and generate the control signal according to the predetermined output voltage.