Patent ID: 7492619

Claim:
A system for regulating a power converter, the system comprising: a signal processing component configured to receive a first voltage and a second voltage, to process information associated with the first voltage and the second voltage, to determine a first signal based on at least information associated with the first voltage and the second voltage, and to send the first signal to a switch for a power converter, the switch being regulated based on at least information associated with the first signal; wherein the signal processing component is further configured to: if the first voltage is higher than a first threshold, determine the first signal to be associated with a first mode; if the first voltage is lower than a second threshold and the second voltage is higher than a third threshold, determine the first signal to be associated with a second mode; and if the first voltage is lower than the second threshold and the second voltage is lower than the third threshold, determine the first signal to be associated with a third mode; wherein: the third threshold is higher than an under-voltage-lockout voltage: if the first signal is associated with the first mode, the signal processing component causes the switch to be modulated at a first frequency; if the first signal is associated with the second mode, the signal processing component causes the switch not to be modulated; if the first signal is associated with the third mode, the signal processing component causes the switch to be closed for a period of time; and when the switch is closed for the period of time, the first voltage rises.