SYSTEM AND METHOD FOR PROVIDING FAST TRANSIENT RESPONSE WITH DYNAMIC SWITCHING FREQUENCY ADJUSTMENT

摘要

A method and a circuit dynamically adjust a frequency of a clock signal that drives the operations of a power converter. The method includes (a) detecting a change from a predetermined value in an output voltage of the power converter; and (b) upon detecting the change, changing the frequency of the clock signal so as to restore the output voltage. The change, such as a load step-up, may be detected by comparing a feedback signal generated from the output voltage and a predetermined threshold voltage. In one implementation, changing the switching frequency is achieved in increasing (e.g., doubling) the frequency of the clock signal, as needed. The frequency of the clock signal need only be changed for a predetermined time period.

主权项

1. A method for dynamically adjusting a frequency of a clock signal that drives operation of a power converter, comprising:
detecting a change from a predetermined steady state value in an output voltage of the power converter; and upon detecting the change, changing the frequency of the clock signal so as to restore the output voltage to the predetermined steady state value.