Control circuit and tracking method of maximum power

A control circuit to control a power output module, and to drive a load device, the control circuit comprising:

• a conversion unit electrically connected with the power output module and the load device, and generating a driving signal according to an output signal of the power output module to drive the load device;
• a feed-forward unit electrically connected with the power output module and the conversion unit, and generating a duty cycle reference signal according to the output signal;
• a feedback unit electrically connected with the conversion unit, the load device and the feed-forward unit, and generating a feedback signal according to the driving signal;
• and
• a control unit electrically connected with the feed-forward unit, the feedback unit and the conversion unit, and outputting a control signal to control the conversion unit according to the duty cycle reference signal and the feedback signal, thereby limiting an output power of the power output module within a maximum power region.