CONTROL CIRCUIT OF POWER CONVERTER

摘要

A control circuit of a power converter includes: an error detection circuit, configured to operably generate an error signal according to a reference signal and a feedback signal when coupling with an external feedback node of an external feedback circuit; an output signal detecting circuit, positioned inside the control circuit, configured to operably receive and detect an output signal of the power converter to generate a representative signal; an on time deciding circuit, coupled with the output signal detecting circuit, configured to operably generate an on time signal according to the representative signal; and a control signal generating circuit, coupled with the error detection circuit and the on time deciding circuit, configured to operably control on time of one or more power switches of the power converter according to the error signal and the on time signal.

主权项

1. A control circuit of a power converter, the power converter comprising an inductor, one or more power switches, and an external feedback circuit, wherein the one or more power switches are utilized for controlling the inductor to store or release energy to convert an input signal into an output signal, and the external feedback circuit is utilized for generating a feedback signal corresponding to a magnitude of the output signal, the control circuit comprising:
an error detection circuit, configured to operably generate an error signal according to a reference signal and the feedback signal when coupling with an external feedback node of the external feedback circuit; an output signal detecting circuit, positioned inside the control circuit, configured to operably receive and detect the output signal to generate a representative signal; an on time deciding circuit, coupled with the output signal detecting circuit, configured to operably generate an on time signal according to the representative signal; and a control signal generating circuit, coupled with the error detection circuit and the on time deciding circuit, configured to operably control on time of the one or more power switches according to the error signal and the on time signal.