公开(公告)号：EP2737617A1

公开(公告)日：2014-06-04

申请号：EP12819890.0

申请日：2012-07-27

Applicant: Shenzhen BYD Auto R&D Company Limited ,  BYD Company Limited

Inventor： WANG, Wenqing ,  YANG, Xiaohua ,  YU, Chuntian ,  FENG, Yuming

IPC: H02M7/217

CPC classification number: H02M3/33507 ,  H02M3/33523 ,  H02M2001/0003 ,  H02M2001/0035 ,  Y02B70/16

Abstract: A control IC of a switch power supply, connected with a switch of the switch power supply, comprises: a voltage collecting module (112), configured to collect a feedback voltage of an output voltage of the switch power supply; an error amplifying module (113), configured to compare the feedback voltage and a reference voltage and output a error voltage; a time collecting module (114), configured to obtain a degaussing time signal according to the feedback voltage, and a control module (115), configured to collect a peak current feedback signal of the switch, control a frequency and duty ratio of a control signal according to the error voltage (VEA), the degaussing time signal (Tds) and the peak current feedback signal (CS), and control the switch according to the control signal. A switch power supply is also provided.

公开(公告)号：EP2737617B1

公开(公告)日：2018-06-13

申请号：EP12819890.0

申请日：2012-07-27

Applicant: Shenzhen BYD Auto R&D Company Limited ,  BYD Company Limited

Inventor： WANG, Wenqing ,  YANG, Xiaohua ,  YU, Chuntian ,  FENG, Yuming

IPC: H02M7/217 ,  H02M3/335

CPC classification number: H02M3/33507 ,  H02M3/33523 ,  H02M2001/0003 ,  H02M2001/0035 ,  Y02B70/16

Abstract: A control integrated circuit for controlling a switch power supply, including: a voltage collecting module, configured to collect a feedback voltage based on an output voltage of the switch power supply; an error amplifying module, configured to compare the feedback voltage with a reference voltage and generate an error voltage; a time collecting module, configured to obtain a degaussing time signal based on the feedback voltage; and a constant voltage and current module, configured to collect a peak current feedback signal of a switch transistor, generate a control signal based on the error voltage, the degaussing time signal and the peak current feedback signal, wherein the control signal is for controlling an operating frequency and a duty ratio of the switch transistor, and control the switch transistor according to the control signal.