Overcurrent protection device for a power supply device and related power supply device

An overcurrent protection device for a power supply device includes a receiving end for receiving a current sensing signal, a compensating current unit coupled to the receiving end for compensating the current sensing signal in order to generate a current sense compensation signal, a first reference...

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Bibliographic Details
Main Authors Wang, Yen-Hui, Wu, Chi-Hao, Hung, Chia-Chieh, Lin, Chin-Yen
Format Patent
LanguageEnglish
Published 18.01.2011
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Summary:An overcurrent protection device for a power supply device includes a receiving end for receiving a current sensing signal, a compensating current unit coupled to the receiving end for compensating the current sensing signal in order to generate a current sense compensation signal, a first reference voltage generator for generating a first reference voltage, a comparator coupled between the compensating current unit and the first reference voltage generator for comparing the current sense compensation signal with the first reference voltage in order to generate a comparison result, a control unit coupled to the comparator for controlling a power switch of the power supply device according to the comparison result.