Control circuit for controlling the maximum output current of power converter and method thereof

摘要

A control circuit of the power converter according to the present invention comprises a feedback circuit, an output circuit and an adaptive clamping circuit. The feedback circuit generates a feedback signal in accordance with an output of the power converter. The output circuit generates a switching signal in accordance with the feedback signal for regulating the output of the power converter. The adaptive clamping circuit limits the level of the feedback signal under a first level for a first load condition. The feedback circuit determines a slew rate of the feedback signal for increasing the level of the feedback signal from the first level to a second level. The adaptive clamping circuit is disabled and the level of the feedback signal can be increased to the second level for a second load condition.

主权项

1. A control circuit of a power converter, comprising:
a feedback circuit, generating a feedback signal in accordance with an output of the power converter; an output circuit, generating a switching signal in accordance with the feedback signal for regulating the output of the power converter; and an adaptive clamping circuit, limiting the level of the feedback signal under a first level for a first load condition; wherein the feedback circuit determines a slew rate of the feedback signal for increasing the level of the feedback signal from the first level to a second level; the adaptive clamping circuit is disabled and the level of the feedback signal can be increased to the second level for a second load condition.