Compensation circuit, method of operation thereof and converter employing the same

摘要

A switched-mode power converter (100) has a modulator (150) that develops a drive signal for a power switch (Q1), and a compensation circuit (160). In one embodiment the compensation circuit (160) includes (1) a sensor (170) that senses the output characteristic of the converter, and (2) a filter (180), coupled to the sensor, that develops an intermediate signal representing a change in the output characteristic. The modulator (150) adjusts a switching period of the drive signal as a function of the intermediate signal thereby to decrease a reaction delay of the converter.