Patent ID: 9312690
Filing Date: 2016-04-12
CPC Classification: H02H

Claim Text:
1. A protective circuit connected to an input source, wherein the input source provides an input current, and the protective circuit outputs an output voltage, the protective circuit comprising: a charging unit for receiving a rise-voltage signal and an over-current signal and outputting a first reference voltage; a voltage regulating unit electrically connected to the charging unit, wherein the voltage regulating unit receives the first reference voltage, and adjusts the output voltage according to the first reference voltage and a feedback voltage corresponding to the input current; a comparing unit electrically connected to the voltage regulating unit and the charging unit for receiving the feedback voltage, and comparing the feedback voltage with a first threshold voltage to determine whether to output the rise-voltage signal to the charging unit; and an over-current detecting unit electrically connected to the voltage regulating unit and the charging unit for receiving a detecting voltage corresponding to the input current from the voltage regulating unit, wherein the over-current detecting unit compares the detecting voltage with a second threshold voltage to determine whether to output the over-current signal.