Patent ID: 9130460
Filing Date: 2015-09-08
Classification: H02M,Y02B,Y02P

Abstract:
1. A master-slave interleaved boundary conduction mode (BCM) power factor correction (PFC) controller for controlling a PFC circuit with master and slave channels, said PFC controller comprising: a) a first switch of said master channel, said first switch being configured to control operation of said master channel; b) a second switch of said slave channel, said second switch being configured to control operation of said slave channel; c) a first phase shifter configured to generate a slave channel turn-on controlling signal by phase delaying a turn-on signal of said first switch by less than 180°; d) a second phase shifter configured to generate a slave channel turn-off controlling signal by phase delaying a turn-off signal of said first switch by at least 180°; and e) a slave channel controller configured to receive said slave channel turn-on controlling signal, said slave channel turn-off controlling signal, and a slave channel inductor current zero-crossing signal, and to generate a slave channel control signal therefrom, wherein said second switch is configured to be turned on when said slave channel turn-on controlling signal and said slave channel inductor current zero-crossing signal are both active, and wherein said second switch is configured to be turned off when said slave channel turn-off controlling signal is active.