| 摘要 |
PROBLEM TO BE SOLVED: To provide a controller for controlling a power converter. SOLUTION: In one embodiment, the controller includes a first comparator, a second comparator and a control unit coupled to the first and second comparators. The first comparator compares a first sense signal indicative of an output current flowing through an energy storage component of the power converter with a first threshold, and generates a first comparison signal. The second comparator is operable so as to compare a second sense signal indicative of the output current with a second threshold and for generating a second comparison signal. The control unit is operable for turning a switch of the power convertor on and off, in accordance with the first and second comparison signals. The energy storage component is coupled to a power source for storing energy from the power source, if the switch is turned on and is decoupled from the power source for releasing stored energy to a load, if the switch is turned off. COPYRIGHT: (C)2011,JPO&INPIT
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