Invention Grant
US09189004B2 Control circuit, control method used in PFC circuit and power source system thereof
有权
控制电路,PFC电路中使用的控制方法及其电源系统
- Patent Title: Control circuit, control method used in PFC circuit and power source system thereof
- Patent Title (中): 控制电路,PFC电路中使用的控制方法及其电源系统
-
Application No.: US13759043Application Date: 2013-02-05
-
Publication No.: US09189004B2Publication Date: 2015-11-17
- Inventor: Hong-Yuan Jin , De-Sheng Guo , Hong-Jian Gan , Jian-Ping Ying
- Applicant: Delta Electronics, Inc.
- Applicant Address: TW Taoyuan Hsien
- Assignee: DELTA ELECTRONICS, INC.
- Current Assignee: DELTA ELECTRONICS, INC.
- Current Assignee Address: TW Taoyuan Hsien
- Agency: CKC & Partners Co., Ltd.
- Priority: CN201210284439 20120806
- Main IPC: G05F1/00
- IPC: G05F1/00 ; G05F1/70 ; H02M1/42

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.
Public/Granted literature
- US20140035541A1 CONTROL CIRCUIT, CONTROL METHOD USED IN PFC CIRCUIT AND POWER SOURCE SYSTEM THEREOF Public/Granted day:2014-02-06
Information query
IPC分类: