Power conversion device and control method thereof

A power conversion device, comprising:

• a primary side rectifier configured to generate a first voltage;
• a main converter comprising a power transistor and being configured to adjust the first voltage to generate a second voltage according to a control signal;
• a secondary side rectifier configured to generate an output voltage according to the second voltage;
• a secondary side feedback controller configured to generate a feedback signal according to the output voltage;
• a PWM controller configured to generate a PWM signal according to the feedback signal;
• and
• a driving compensator comprising a driving resistor circuit, wherein the PWM signal outputs the control signal through the driving resistor circuit, and the driving compensator is configured to adjust a resistance value of the driving resistor circuit according to the first voltage;
• wherein the driving compensator comprises:
• a voltage detection circuit coupled to the primary side rectifier and configured to detect the first voltage;
• and
• a driving compensation circuit coupled to the voltage detection circuit and configured to adjust the resistance value of the driving resistor circuit according to the first voltage.