Driving circuit and error amplifier thereof

摘要

An error amplifier and a driving circuit are disclosed herein. The error amplifier is configured to charge a compensation capacitor with an error current. The error amplifier includes an input stage, a main output stage, and an auxiliary output stage. The input stage is configured to provide a first differential output signal and a second differential output signal in response to a comparison between a reference voltage and a feedback voltage. The main output stage is configured to charge the compensation capacitor. The auxiliary output stage is configured to be activated to charge the compensation capacitor. a first operation, both the main output stage and the auxiliary output stage charge the compensation capacitor. In a second operation, the main output stage charges the compensation capacitor, and the auxiliary output stage is deactivated and does not charge the compensation capacitor.

主权项

1. An error amplifier configured to charge a compensation capacitor with an error current, wherein the error amplifier comprises:
an input stage configured to receive a reference voltage and a feedback voltage, and to provide a first differential output signal and a second differential output signal in response to a comparison between the reference voltage and the feedback voltage; a main output stage configured to receive the first differential output signal and the second differential output signal, and to charge the compensation capacitor; and an auxiliary output stage configured to receive the first differential output signal and the second differential output signal, and to be activated to charge the compensation capacitor; wherein in a first operation, both the main output stage and the auxiliary output stage charge the compensation capacitor; and in a second operation, the main output stage charges the compensation capacitor, and the auxiliary output stage is deactivated and does not charge the compensation capacitor.