Control circuit and synchronous protection control system

摘要

A control circuit, comprising a protection detection circuit, a protection synchronous output circuit, a protection synchronous input circuit and a protection circuit, is provided. The protection detection circuit is adapted to generate an error notice signal when detecting an error condition. The protection synchronous output circuit is coupled to the protection detection circuit for enabling a level of a protection synchronous pin to be a protection level when receiving the error notice signal. The protection synchronous input circuit is coupled to the protection synchronous pin for generating a synchronous protection signal when the level of the protection synchronous pin has been at the protection level for a predetermined time period. The protection circuit generates a protection signal to make the control circuit enter a protection mode when receiving one of the error notice signal and the synchronous protection signal.

主权项

1. A control circuit, comprising:
a protection detection circuit for generating an error notice signal when detecting an error condition; a protection synchronous output circuit which is coupled to the protection detection circuit and enables a level of a protection synchronous pin to be a first logic level when receiving the error notice signal; a protection synchronous input circuit which is coupled to the protection synchronous pin and generates a synchronous protection signal when it is detected that the level of the protection synchronous pin has been at the first logic level for a predetermined time period; and a protection circuit which is coupled to the protection detection circuit and the protection synchronous input circuit and generates a protection signal when receiving one of the error notice signal and the synchronous protection signal to make the control circuit enter a protection mode.