公开(公告)号：US09287763B2

公开(公告)日：2016-03-15

申请号：US14738351

申请日：2015-06-12

Applicant: Analog Devices Global

Inventor： Yingyang Ou ,  Renjian Xie ,  Huailiang Sheng

IPC: H02M3/335 ,  H02M1/08 ,  H02M1/40 ,  H03K17/56 ,  H02M7/48

CPC classification number: H02M1/08 ,  H02M1/40 ,  H02M3/33507 ,  H02M3/33576 ,  H02M2007/4803 ,  H03K17/56

Abstract: A duty cycle balance module (DCBM) for use with a switch mode power converter. One possible half-bridge converter embodiment includes a transformer driven to conduct current in first and second directions by first and second signals during and second half-cycles, respectively. A current limiting mechanism adjusts the duty cycles of the first and second signals when a sensed current exceeds a predetermined limit threshold. The DCBM receives signals representative of the duty cycles which would be used if there were no modification by the current limiting mechanism and signals Dact—1 and Dact—2 representative of the duty cycles that are actually used for the first and second signals, and outputs signals Dbl—1 and Dbl—2 which modify signals Dact—1 and Dact—2 as needed to dynamically balance the duty cycles of the first and second signals and thereby reduce flux imbalance in the transformer that might otherwise arise.

公开(公告)号：US09680386B2

公开(公告)日：2017-06-13

申请号：US14529430

申请日：2014-10-31

Applicant: Analog Devices Global

Inventor： Renjian Xie ,  Yingyang Ou

IPC: H02M3/335 ,  H02M3/337 ,  H02M1/34

CPC classification number: H02M3/33592 ,  H02M3/3376 ,  H02M2001/342 ,  Y02B70/1475 ,  Y02B70/1491

Abstract: This application provides methods and apparatus for controlling aspects of a synchronous rectifier power converter. In an example, an apparatus can include a minimum duty cycle control circuit configured to receive first control signals for one or more switches associated with the synchronous rectifier power converter, to compare a duty cycle of the first control signals to a minimum duty cycle threshold, and to provide second control signals having at least the minimum duty cycle for an active snubber switch of the synchronous rectifier power converter.

公开(公告)号：US20160087541A1

公开(公告)日：2016-03-24

申请号：US14529430

申请日：2014-10-31

Applicant: Analog Devices Global

Inventor： Renjian Xie ,  Yingyang Ou

IPC: H02M3/335

CPC classification number: H02M3/33592 ,  H02M3/3376 ,  H02M2001/342 ,  Y02B70/1475 ,  Y02B70/1491

Abstract: This application provides methods and apparatus for controlling aspects of a synchronous rectifier power converter. In an example, an apparatus can include a minimum duty cycle control circuit configured to receive first control signals for one or more switches associated with the synchronous rectifier power converter, to compare a duty cycle of the first control signals to a minimum duty cycle threshold, and to provide second control signals having at least the minimum duty cycle for an active snubber switch of the synchronous rectifier power converter.

Abstract translation: 本申请提供了用于控制同步整流器功率转换器的方面的方法和装置。 在一个示例中，装置可以包括最小占空比控制电路，其被配置为接收与同步整流器功率转换器相关联的一个或多个开关的第一控制信号，以将第一控制信号的占空比与最小占空比阈值进行比较， 并且提供对于同步整流器功率转换器的有源缓冲开关至少具有最小占空比的第二控制信号。

公开(公告)号：US09350259B2

公开(公告)日：2016-05-24

申请号：US13955971

申请日：2013-07-31

Applicant: Analog Devices Global

Inventor： Yingyang Ou ,  Renjian Xie ,  Qingyi Huang

IPC: H02M3/335 ,  H02M3/337

CPC classification number: H02M3/337 ,  H02M3/33592 ,  Y02B70/1475

Abstract: An apparatus comprises a power converter circuit and a control circuit. The power converter circuit includes a primary circuit side and a secondary circuit side. The primary circuit side includes a plurality of primary switches, and the secondary circuit side includes a plurality of synchronous rectifiers and an inductor. The control circuit is configured to operate the synchronous rectifiers synchronously with the primary switches when inductor current at the inductor is greater than or equal to a reference inductor current, and operate the synchronous rectifiers in a bidirectional mode when the inductor current is less than the reference inductor current, wherein energy is delivered from the primary side to the secondary side and from the secondary side to the primary side during the bidirectional mode.

Abstract translation: 一种装置包括功率转换器电路和控制电路。 功率转换器电路包括初级电路侧和次级电路侧。 主电路侧包括多个初级开关，次级电路侧包括多个同步整流器和电感器。 控制电路被配置为当电感器上的电感电流大于或等于参考电感器电流时与主开关同步地操作同步整流器，并且当电感器电流小于参考电压时，以双向模式操作同步整流器 电感电流，其中在双向模式期间，能量从初级侧传递到次级侧，从次级侧传递到初级侧。

公开(公告)号：US20150280543A1

公开(公告)日：2015-10-01

申请号：US14738351

申请日：2015-06-12

Applicant: Analog Devices Global

Inventor： Yingyang Ou ,  Renjian Xie ,  Huailiang Sheng

IPC: H02M1/08 ,  H03K17/56 ,  H02M3/335

CPC classification number: H02M1/08 ,  H02M1/40 ,  H02M3/33507 ,  H02M3/33576 ,  H02M2007/4803 ,  H03K17/56

Abstract: A duty cycle balance module (DCBM) for use with a switch mode power converter. One possible half-bridge converter embodiment includes a transformer driven to conduct current in first and second directions by first and second signals during and second half-cycles, respectively. A current limiting mechanism adjusts the duty cycles of the first and second signals when a sensed current exceeds a predetermined limit threshold. The DCBM receives signals representative of the duty cycles which would be used if there were no modification by the current limiting mechanism and signals Dact—1 and Dact—2 representative of the duty cycles that are actually used for the first and second signals, and outputs signals Dbl—1 and Dbl—2 which modify signals Dact—1 and Dact—2 as needed to dynamically balance the duty cycles of the first and second signals and thereby reduce flux imbalance in the transformer that might otherwise arise.

Abstract translation: 用于开关模式功率转换器的占空比平衡模块（DCBM）。 一个可能的半桥转换器实施例包括分别被驱动以在第一和第二方向通过第一和第二信号在第一和第二半周期期间传导电流的变压器。 当感测电流超过预定极限阈值时，电流限制机构调节第一和第二信号的占空比。 DCBM接收代表占空比的信号，如果没有通过电流限制机制进行修改，并且表示实际用于第一和第二信号的占空比的Dact-1和Dact-2信号，以及输出 信号Dbl-1和Dbl-2，其根据需要修改信号Dact-1和Dact-2，以动态平衡第一和第二信号的占空比，从而减少可能出现的变压器中的通量不平衡。