SYSTEM AND METHOD FOR IMPROVED LINE TRANSIENT RESPONSE IN CURRENT MODE BOOST CONVERTERS

摘要

An improved DC-DC power converter employs a feed-forward circuit to improve the response of the output voltage to transient signals on the input voltage. A portion of the input voltage generated by the feed-forward circuit is combined with either the sense voltage or the set point reference to offset one of the voltages applied to the PWM circuit comparator. The feed-forward circuit essentially bypasses the PWM feedback loop to quickly pre-compensate for the input transient and allow the output voltage to settle rapidly at a new operating point. The feed-forward circuit can be implemented with a resistive voltage divider network connected to the input voltage.