REGULATION CIRCUIT FOR CANCELLING NOISE OF FEEDBACK SIGNAL FOR PRIMARY SIDE REGULATION VARIABLE CONSTANT CURRENT REGULATION OF ADAPTER AND REGULATION METHOD THEREOF

摘要

Disclosed are a control circuit capable of removing noise in a feedback signal for the control of PSR-variable constant current of an adaptor and a control method thereof. The control circuit includes: a conversion unit which converts a first voltage to a second voltage depending on the turns ratio of a primary coil and a secondary coil; a secondary-side control unit which modulates the voltage feedback data about the output voltage from the conversion into different modulation methods and delivers the feedback signal including the modulated signals to a primary-side control unit; and the primary-side control unit which recovers the modulated signals included in the feedback signal in different demodulation methods corresponding to the different modulation methods and removes noise from the feedback signal using the recovered signals.