公开(公告)号：US09473017B2

公开(公告)日：2016-10-18

申请号：US14707015

申请日：2015-05-08

Applicant: DELTA ELECTRONICS, INC.

Inventor： Hong-Yuan Jin ,  De-Sheng Guo ,  Hong-Jian Gan ,  Jian-Ping Ying

IPC: H02M3/156 ,  H02M1/42 ,  G05F1/70 ,  H02M7/06

CPC classification number: H02M1/4208 ,  G05F1/70 ,  H02M1/4225 ,  H02M3/156 ,  H02M7/06 ,  Y02B70/126 ,  Y02P80/112

Abstract: A control circuit, control method used in a PFC circuit and the power source system thereof are disclosed herein. The control circuit comprises: a zero current detection circuit having a polarity detection circuit for outputting a first and a second digital signals and a signal conversion circuit for generating an analog signal; a feedback circuit for generating a driving pulse signal; and a pulse distribution circuit for distributing the driving pulse signal to a first and a second switches according to the first and the second digital signal. After a switch cycle, one of the first and the second switch performs an ON operation for the next switch cycle when the current flowing through the inductor decreases to a predetermined threshold value, wherein an ON time of the first switch is equal in each switch cycle, and an ON time of the second switch is equal in each switch cycle.

公开(公告)号：US09189004B2

公开(公告)日：2015-11-17

申请号：US13759043

申请日：2013-02-05

Applicant: Delta Electronics, Inc.

Inventor： Hong-Yuan Jin ,  De-Sheng Guo ,  Hong-Jian Gan ,  Jian-Ping Ying

IPC: G05F1/00 ,  G05F1/70 ,  H02M1/42

CPC classification number: H02M1/4208 ,  G05F1/70 ,  H02M1/4225 ,  H02M3/156 ,  H02M7/06 ,  Y02B70/126 ,  Y02P80/112

Abstract: A control circuit, control method used in a PFC circuit and the power source system thereof are disclosed herein. The control circuit comprises: a zero current detection circuit having a polarity detection circuit for outputting a first and a second digital signals and a signal conversion circuit for generating an analog signal; a feedback circuit for generating a driving pulse signal; and a pulse distribution circuit for distributing the driving pulse signal to a first and a second switches according to the first and the second digital signal. After a switch cycle, one of the first and the second switch performs an ON operation for the next switch cycle when the current flowing through the inductor decreases to a predetermined threshold value, wherein an ON time of the first switch is equal in each switch cycle, and an ON time of the second switch is equal in each switch cycle.

Abstract translation: 本文公开了PFC电路中使用的控制电路，控制方法及其电源系统。 控制电路包括：零电流检测电路，具有用于输出第一和第二数字信号的极性检测电路和用于产生模拟信号的信号转换电路; 用于产生驱动脉冲信号的反馈电路; 以及脉冲分配电路，用于根据第一和第二数字信号将驱动脉冲信号分配到第一和第二开关。 在开关周期之后，当流过电感器的电流降低到预定阈值时，第一和第二开关中的一个开关对下一个开关周期执行ON操作，其中在每个开关周期中第一开关的导通时间相等 并且在每个开关周期中第二开关的导通时间相等。