Patent ID: 9246380
Filing Date: 2016-01-26
CPC Classification: H02M,Y02B,Y02P

Claim Text:
1. A control circuit module for a power factor corrector, the control circuit module coupled to an inductor element, and the inductor element coupled to an input voltage terminal and an output voltage terminal; the control circuit module comprising: a transistor element coupled to the inductor element; a zero-current detection circuit coupled to the transistor element, and configured to generate a first signal when the transistor element is switched under the off-state operation; a latch and counting circuit coupled to the transistor element, and configured to generate a second signal; a logic judgment circuit coupled to the zero-current detection circuit and the latch and counting circuit, and configured to receive the first signal and the second signal and generate a third signal; an integrated circuit coupled to the logic judgment circuit, and configured to receive the third signal and generate a gate signal and transmit the gate signal to the transistor element so that the transistor element is turned on; a latch unlocking circuit coupled to the integrated circuit, and configured to receive the gate signal and generate a latch unlocking signal and transmit the latch unlocking signal to the latch and counting circuit; and a compensation circuit coupled to the latch and counting circuit, wherein the latch and counting circuit is configured to generate the second signal when a counting time of the latch and counting circuit reaches a predetermined value so that an operation mode of an inductor current of the inductor element is converted from a boundary conduction mode to a discontinuous conduction mode; and the latch and counting circuit is configured to reset to an initial state and recount when the latch and counting circuit is configured to receive the latch unlocking signal; the compensation circuit is configured to adjust the counting time of the latch and counting circuit when the transistor element is operated under a peak inductor current of the inductor element so that the transistor element is maintained in the boundary conduction mode.