公开(公告)号：US09735693B2

公开(公告)日：2017-08-15

申请号：US14689041

申请日：2015-04-16

Applicant: Power Forest Technology Corporation

Inventor： Chein-Kuo Shein

IPC: H02M3/335 ,  H02M1/00

CPC classification number: H02M3/33592 ,  H02M2001/0032 ,  H02M2001/0054 ,  Y02B70/1475 ,  Y02B70/1491 ,  Y02B70/16

Abstract: A power conversion apparatus is provided. The power conversion apparatus includes a transformer, a synchronous rectification (SR) transistor and an SR control circuit. A first terminal of a primary side of the transformer receives an input voltage. A first terminal of a secondary side of the transformer provides an output voltage to a load. A first drain/source terminal of the SR transistor is coupled to a second terminal of the secondary side of the transformer. A second drain/source terminal of the SR transistor is coupled to a first ground terminal. A gate terminal of the SR transistor receives a control signal. The SR control circuit receives a signal of the first drain/source terminal of the SR transistor to determine statuses of the load and generate the control signal. When the load is a light load, the SR control circuit enters a power-saving mode and turns off the SR transistor.

公开(公告)号：US20160190947A1

公开(公告)日：2016-06-30

申请号：US14689041

申请日：2015-04-16

Applicant: Power Forest Technology Corporation

Inventor： Chein-Kuo Shein

IPC: H02M3/335 ,  H02M1/08

CPC classification number: H02M3/33592 ,  H02M2001/0032 ,  H02M2001/0054 ,  Y02B70/1475 ,  Y02B70/1491 ,  Y02B70/16

Abstract: A power conversion apparatus is provided. The power conversion apparatus includes a transformer, a synchronous rectification (SR) transistor and an SR control circuit. A first terminal of a primary side of the transformer receives an input voltage. A first terminal of a secondary side of the transformer provides an output voltage to a load. A first drain/source terminal of the SR transistor is coupled to a second terminal of the secondary side of the transformer. A second drain/source terminal of the SR transistor is coupled to a first ground terminal. A gate terminal of the SR transistor receives a control signal. The SR control circuit receives a signal of the first drain/source terminal of the SR transistor to determine statuses of the load and generate the control signal. When the load is a light load, the SR control circuit enters a power-saving mode and turns off the SR transistor.

Abstract translation: 提供电力转换装置。 电力转换装置包括变压器，同步整流（SR）晶体管和SR控制电路。 变压器初级侧的第一端接收输入电压。 变压器的次级侧的第一端子向负载提供输出电压。 SR晶体管的第一漏极/源极端子耦合到变压器的次级侧的第二端子。 SR晶体管的第二漏极/源极端子耦合到第一接地端子。 SR晶体管的栅极端子接收控制信号。 SR控制电路接收SR晶体管的第一漏极/源极端子的信号，以确定负载的状态并产生控制信号。 当负载轻负载时，SR控制电路进入省电模式并关断SR晶体管。