公开(公告)号：US20150207423A1

公开(公告)日：2015-07-23

申请号：US14160831

申请日：2014-01-22

Applicant: Linear Technology Corporation

Inventor： Niranjan Ganesh Kumar

IPC: H02M3/335 ,  H02M1/08

CPC classification number: H02M3/33592 ,  H02M3/33553 ,  H02M2001/0009 ,  H02M2001/0032 ,  Y02B70/1475 ,  Y02B70/16

Abstract: A forward converter has a primary side containing a PWM controller for controlling switching of a power switch and has a secondary side coupled to the primary side via a transformer. The secondary side includes a forward transistor and a catch transistor. A secondary side switch controller controls switching of the forward transistor and the catch transistor without communication from the primary side. The secondary side switch controller detects the rising and falling of the voltages at the ends of the secondary winding to control the switching of the forward and catch transistors. A delay locked loop (DLL) is provided in the secondary side switch controller that turns on the catch transistor when the power switch is turned off and turns off the catch transistor at a predetermined time before the power switch is turned on. A separate circuit controls the catch transistor during a discontinuous mode.

Abstract translation: 正向转换器具有包含用于控制功率开关的开关的PWM控制器的初级侧，并且具有经由变压器耦合到初级侧的次级侧。 次级侧包括正向晶体管和捕获晶体管。 次级侧开关控制器控制正向晶体管和捕获晶体管的开关，而不与初级侧通信。 次级侧开关控制器检测次级绕组端部的电压的上升和下降以控制正向和捕获晶体管的切换。 在次级侧开关控制器中提供延迟锁定环（DLL），其在电源开关断开时接通捕获晶体管，并且在电源开关接通之前的预定时间关闭捕获晶体管。 单独的电路在不连续模式期间控制捕获晶体管。

公开(公告)号：US09270190B2

公开(公告)日：2016-02-23

申请号：US14160831

申请日：2014-01-22

Applicant: Linear Technology Corporation

Inventor： Niranjan Ganesh Kumar

IPC: H02M3/335 ,  H02M1/00

CPC classification number: H02M3/33592 ,  H02M3/33553 ,  H02M2001/0009 ,  H02M2001/0032 ,  Y02B70/1475 ,  Y02B70/16

Abstract: A forward converter has a primary side containing a PWM controller for controlling switching of a power switch and has a secondary side coupled to the primary side via a transformer. The secondary side includes a forward transistor and a catch transistor. A secondary side switch controller controls switching of the forward transistor and the catch transistor without communication from the primary side. The secondary side switch controller detects the rising and falling of the voltages at the ends of the secondary winding to control the switching of the forward and catch transistors. A delay locked loop (DLL) is provided in the secondary side switch controller that turns on the catch transistor when the power switch is turned off and turns off the catch transistor at a predetermined time before the power switch is turned on. A separate circuit controls the catch transistor during a discontinuous mode.

Abstract translation: 正向转换器具有包含用于控制功率开关的开关的PWM控制器的初级侧，并且具有经由变压器耦合到初级侧的次级侧。 次级侧包括正向晶体管和捕获晶体管。 次级侧开关控制器控制正向晶体管和捕获晶体管的开关，而不与初级侧通信。 次级侧开关控制器检测次级绕组端部的电压的上升和下降以控制正向和捕获晶体管的切换。 在次级侧开关控制器中提供延迟锁定环（DLL），其在电源开关断开时接通捕获晶体管，并且在电源开关接通之前的预定时间关闭捕获晶体管。 单独的电路在不连续模式期间控制捕获晶体管。