Patent ID: 8559152
Filing Date: 2013-10-15
Classification: H02H,H02M

Abstract:
1. A system for protecting a power converter, the system comprising: a duty-cycle detection component configured to receive a modulation signal, determine a first duty cycle corresponding to a first period of the modulation signal, compare the first duty cycle with a threshold duty cycle, and generate a duty-cycle comparison signal; a threshold generator configured to receive the duty-cycle comparison signal and generate a threshold signal corresponding to a second period of the modulation signal, the second period being after the first period; a comparator component configured to receive the 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; and a pulse-width-modulation component configured to receive the first comparison signal and generate the modulation signal for adjusting the input current for the power converter based on at least information associated with the first comparison signal; wherein: