公开(公告)号：US07843184B2

公开(公告)日：2010-11-30

申请号：US11967835

申请日：2007-12-31

Applicant: Xin Wu ,  Sen Dou

Inventor： Xin Wu ,  Sen Dou

IPC: G05F1/40

CPC classification number: H02M3/285 ,  H02M3/28 ,  H02M2001/0019

Abstract: A system to supply power to an electronic system, comprises a set of one or more power units each configured to transform an input voltage into an output voltage; and a line regulator coupled to a power unit and configured to modulate a duty cycle of the power unit and a load regulator configured to provide a second control signal to a power unit to selectively enable the power unit based on load information provided by the electronic system.

Abstract translation: 向电子系统供电的系统包括一组一个或多个功率单元，每个功率单元被配置为将输入电压变换成输出电压; 以及线调节器，其耦合到功率单元并且被配置为调制所述功率单元的占空比和负载调节器，所述负载调节器被配置为向功率单元提供第二控制信号，以基于由所述电子系统提供的负载信息来选择性地启用所述功率单元 。

公开(公告)号：US20090167278A1

公开(公告)日：2009-07-02

申请号：US11967835

申请日：2007-12-31

Applicant: Xin Wu ,  Sen Dou

Inventor： Xin Wu ,  Sen Dou

IPC: G05F5/00

CPC classification number: H02M3/285 ,  H02M3/28 ,  H02M2001/0019

Abstract: A system to supply power to an electronic system, comprises a set of one or more power units each configured to transform an input voltage into an output voltage; and a line regulator coupled to a power unit and configured to modulate a duty cycle of the power unit and a load regulator configured to provide a second control signal to a power unit to selectively enable the power unit based on load information provided by the electronic system.

Abstract translation: 向电子系统供电的系统包括一组一个或多个功率单元，每个功率单元被配置为将输入电压变换成输出电压; 以及线调节器，其耦合到功率单元并且被配置为调制所述功率单元的占空比和负载调节器，所述负载调节器被配置为向功率单元提供第二控制信号，以基于由所述电子系统提供的负载信息来选择性地启用所述功率单元 。

公开(公告)号：US20120163040A1

公开(公告)日：2012-06-28

申请号：US13336467

申请日：2011-12-23

Applicant: Hong Liang Zhang ,  Sen Dou ,  Ravishanker Krishnamoorthy ,  Biing Long Shu ,  Wanfeng Zhang

Inventor： Hong Liang Zhang ,  Sen Dou ,  Ravishanker Krishnamoorthy ,  Biing Long Shu ,  Wanfeng Zhang

IPC: H02M3/335

CPC classification number: H02M3/335 ,  H02M1/36

Abstract: Disclosed is flyback converter having a controller that performs a startup switching process when the flyback converter is powered up, and then performs normal switching afterward. The controller includes a pulse generator to generate a control signal for normal switching. During startup switching, the controller may generate a control signal by output every Nth pulse from the pulse generator. In another embodiment, the controller may generate pulses based on a sense signal provided from an input section of the flyback converter.

Abstract translation: 公开了具有控制器的反激式转换器，该控制器在反激式转换器通电时进行启动切换处理，之后进行正常切换。 该控制器包括脉冲发生器，以产生用于正常切换的控制信号。 在启动切换期间，控制器可以通过从脉冲发生器输出每第N个脉冲来产生控制信号。 在另一个实施例中，控制器可以基于从反激转换器的输入部分提供的感测信号产生脉冲。

公开(公告)号：US20050174813A1

公开(公告)日：2005-08-11

申请号：US11044381

申请日：2005-01-26

Applicant: Sen Dou ,  Dong Lin ,  Dao Xu ,  Jun Duan ,  Alpha Zhang

Inventor： Sen Dou ,  Dong Lin ,  Dao Xu ,  Jun Duan ,  Alpha Zhang

IPC: H02M3/335 ,  H02M3/18

CPC classification number: H02M3/33592 ,  H02M2001/007 ,  Y02B70/1475

Abstract: This invention provides an AC-to-DC power converter that improves the overall conversion efficiency especially that at the minimum input ac voltage for universal input operation design by adopting a new combination of control strategies and topologies for the PFC pre-regulator and DC-to-DC converter. The PFC pre-regulator was arranged to provide a regulated bus voltage of which the amplitude is varied in accordance with input ac voltage by a follower boost controller to achieve best efficiency in minimum input ac voltage operation. A synchronous rectifier dual boost PFC pre-regulator was present for further reduction of the power loss in the converter. Symmetrical half-bridge or symmetrical full bridge switch devices were arranged for the primary side of DC-to-DC converter and synchronous rectification circuit with two synchronous rectifier were arranged for the secondary side of the DC-to-DC converter as combination of the AC-to-DC converter. The two synchronous rectifiers were controlled to turn on and turn off complementary to that to the primary half-bridge switch devices to insure a minimized power loss of that converter stage for the extended bus voltage operation design.

Abstract translation: 本发明提供了一种AC到DC功率转换器，其通过采用控制策略和PFC预调节器和DC-to的拓扑结构的新组合来提高整体转换效率，特别是用于通用输入操作设计的最小输入交流电压 -DC转换器。 PFC预调节器被布置成提供调节总线电压，其中幅值根据随动升压控制器的输入交流电压而变化，以在最小输入交流电压操作中实现最佳效率。 存在同步整流器双升压PFC预调节器，用于进一步降低转换器的功率损耗。 配置对称半桥或对称全桥开关器件，用于DC-DC转换器的初级侧，并配有两个同步整流器的同步整流电路用于DC-DC转换器的次级侧，作为AC 直流转换器。 控制两个同步整流器导通和截止与主半桥开关器件互补的整流器，以确保用于扩展总线电压操作设计的该转换器级的最小功率损耗。

公开(公告)号：US08711584B2

公开(公告)日：2014-04-29

申请号：US13336467

申请日：2011-12-23

Applicant: Hong Liang Zhang ,  Sen Dou ,  Ravishanker Krishnamoorthy ,  Biing Long Shu ,  Wanfeng Zhang

Inventor： Hong Liang Zhang ,  Sen Dou ,  Ravishanker Krishnamoorthy ,  Biing Long Shu ,  Wanfeng Zhang

IPC: H02M3/335

CPC classification number: H02M3/335 ,  H02M1/36

Abstract: Disclosed is flyback converter having a controller that performs a startup switching process when the flyback converter is powered up, and then performs normal switching afterward. The controller includes a pulse generator to generate a control signal for normal switching. During startup switching, the controller may generate a control signal by output every Nth pulse from the pulse generator. In another embodiment, the controller may generate pulses based on a sense signal provided from an input section of the flyback converter.

Abstract translation: 公开了具有控制器的反激式转换器，该控制器在反激式转换器通电时进行启动切换处理，之后进行正常切换。 该控制器包括脉冲发生器，以产生用于正常切换的控制信号。 在启动切换期间，控制器可以通过从脉冲发生器输出每第N个脉冲来产生控制信号。 在另一个实施例中，控制器可以基于从反激转换器的输入部分提供的感测信号产生脉冲。

公开(公告)号：US06987679B2

公开(公告)日：2006-01-17

申请号：US10465138

申请日：2003-06-18

Applicant: Hongjian Gan ,  Sen Dou ,  Alpha J. Zhang ,  Alex Jong ,  Chanwit Prasantanakorn

Inventor： Hongjian Gan ,  Sen Dou ,  Alpha J. Zhang ,  Alex Jong ,  Chanwit Prasantanakorn

IPC: H02M7/217

CPC classification number: H02M3/33592 ,  H02M2001/009 ,  Y02B70/1475

Abstract: A cost effective circuit improves the cross regulation of multiple outputs converter, especially for that output chokes are coupled and a synchronous rectifier is applied to one of the outputs. A DC/DC converter includes a transformer having a primary winding and two secondary windings. The first secondary winding is coupled to a synchronous rectifier and a first output choke. The second secondary winding is coupled to a diode rectifier and a second output choke. The first output choke and the second output choke are coupled. A low power MOSFET switch is added to the diode rectifier for avoiding the diode rectifier operating in DCM when light loaded.

Abstract translation: 成本有效的电路改善了多输出转换器的交叉调节，特别是对于输出扼流圈耦合，并且将同步整流器应用于其中一个输出。 DC / DC转换器包括具有初级绕组和两个次级绕组的变压器。 第一次级绕组耦合到同步整流器和第一输出扼流圈。 第二次级绕组耦合到二极管整流器和第二输出扼流圈。 第一输出扼流圈和第二输出扼流圈耦合。 低功率MOSFET开关被添加到二极管整流器，以避免二极管整流器在轻载时在DCM中工作。