Control circuit and tracking method of maximum power

摘要

A control circuit controls a power output module and drives a load device. The control circuit includes a conversion unit, a feed-forward unit, a feedback unit and a control unit. The conversion unit generates a driving signal according to an output signal of the power output module for driving the load device. The feed-forward unit generates a duty cycle reference signal according to the output signal. The feedback unit generates a feedback signal according to the driving signal. The control unit outputs a control signal to control the conversion unit according to the duty cycle reference signal and feedback signal, thereby limiting the output power of the power output module within the maximum power region. A tracking method of the maximum power is also disclosed.

主权项

1. 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, wherein the feedback signal comprises a voltage feedback signal and a current feedback 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, wherein the control unit controls a duty cycle of the output signal of the power output module according to the voltage feedback signal, wherein the duty cycle reference signal is provided to the feedback unit and the control unit.