Patent ID: 9362737
Filing Date: 2016-06-07
CPC Classification: H02H,H02M

Claim Text:
1. A system for protecting a power converter, the system comprising: a first comparator configured to receive a first threshold signal and a first signal and to generate a first comparison signal, the first signal being associated with an input current for a power converter; a second comparator configured to receive a second threshold signal and the first signal and to generate a second comparison signal, the second threshold signal being different from the first threshold signal in magnitude; a first detection component configured to receive at least the second comparison signal, detect the second comparison signal only if one or more predetermined conditions are satisfied, and generate a first detection signal based on at least information associated with the detected second comparison signal; a switch signal generator coupled to at least the first detection component and configured to generate a switch signal for controlling a switch for adjusting the input current for the power converter based on at least information associated with the first comparison signal and the first detection signal; and a second detection component configured to receive the first detection signal and output a second detection signal to the switch signal generator; wherein: wherein, if the first detection signal indicates the first signal is smaller than the second threshold signal in magnitude for a predetermined period of time, the second detection component is further configured to output the second detection signal causing the power converter to be shut down.