Control module and adapter

Abstract

A control module and an adapter are provided. The control module is configured to determine an input current of a buck circuit and an output voltage of a loop compensation circuit; and control turn-off of a switching transistor of the buck circuit based on a relationship between the output voltage and the input current, where a turn-on duty cycle of the switching transistor is in direct proportion to a quotient of the output voltage and an average value of the input current. In this application, the turn-on duty cycle of the buck switching transistor is set to be in direct proportion to the quotient of the output voltage of the loop compensation circuit and the average input current, so that power factor modulation can be implemented, and an input voltage sampling resistor and a corresponding multiplier are omitted.

Dependencies are inferred from the claim text.