Error amplifier switching converter and a control method of error amplifier

Abstract

The present disclosure provides an error amplifier, a switching converter, and a control method of the error amplifier. The error amplifier includes: an operation module for outputting a regulation signal according to a difference between a feedback voltage and a reference voltage, wherein the feedback voltage represents an output voltage of the switching converter, and the regulation signal is used to regulate an output current of the switching converter; a regulation module for regulating a transconductance of the operation module according to an absolute value of the difference between the feedback voltage and the reference voltage or an absolute value of the regulation signal. When an output of the switching converter changes greatly, the transconductance of the error amplifier is increased in real time, thereby a bandwidth is increased to achieve a fast response of the switching converter. The switching converter has high stability when the output is normal.

Dependencies are inferred from the claim text.