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11. 发明公开

US20230188028A1 TWO-PHASE SMART POWER STAGE (SPS) FOR MULTIPHASE BUCK CONVERTERS 审中-公开
公开(公告)号：US20230188028A1
公开(公告)日：2023-06-15
申请号：US17983703
申请日：2022-11-09
申请人： Wenkai Wu , Weidong Zhu , Qian Chen
发明人： Wenkai Wu , Weidong Zhu , Qian Chen
IPC分类号： H02M1/04 , H02M1/00 , H02M3/335
CPC分类号： H02M1/045 , H02M1/0054 , H02M3/33569
摘要： A multiphase buck converter that includes smart two-phase power stages for reducing switching losses. Each of the smart power stages includes a first high side switch, a second high side switch, a first low side switch, a second low side switch, a switching capacitor, a first inductor, and a second inductor. The exemplary multiphase buck converter includes two such smart power stages and a multiphase controller for generating PWM signals for driving the two smart power stages synchronously.

12. 发明申请

US20120038331A1 Systems and Methods of Smooth Light Load Operation in a DC/DC Converter 有权
标题翻译： DC / DC转换器平滑轻载操作的系统与方法
公开(公告)号：US20120038331A1
公开(公告)日：2012-02-16
申请号：US12854097
申请日：2010-08-10
申请人： Wenkai Wu , Weidong Zhu , Hal Chen , Xuening Li
发明人： Wenkai Wu , Weidong Zhu , Hal Chen , Xuening Li
IPC分类号： G05F1/10
CPC分类号： H02M3/1588 , H02M2001/0032 , Y02B70/1466 , Y02B70/16
摘要： Systems and devices for smooth light load operation in a DC/DC converter are presented. The disclosed systems and methods enable smooth discontinuous conduction mode (DCM)/continuous conduction mode (CCM) transition. The disclosed systems and methods of smooth light load operation in a DC/DC converter may also avoid the generation of sub-harmonics during light load operation. In an example embodiment, a rising ramp is used to control the ON time of the converter oscillator, while a falling ramp controls the OFF time. During DCM operation, the minimum value of the falling ramp is clamped. The clamping of the falling ramp ensures a substantially similar level of the error amplifier output in both CCM and DCM and avoids disturbances caused by a difference in the error amplifier outputs between the modes.
摘要翻译：介绍了在DC / DC转换器中平滑轻载操作的系统和设备。所公开的系统和方法实现了平滑的不连续导通模式（DCM）/连续导通模式（CCM）转换。所公开的在DC / DC转换器中平滑轻载操作的系统和方法也可以避免在轻负载操作期间产生次谐波。在示例实施例中，上升斜坡用于控制转换器振荡器的导通时间，而下降斜坡控制OFF时间。在DCM操作期间，下降斜坡的最小值被钳位。下降斜坡的钳位确保CCM和DCM中误差放大器输出的电平基本相似，并避免由模式之间误差放大器输出的差异引起的干扰。

13. 发明授权

US07816901B2 PWM modulator for scalable converters 有权
标题翻译：用于可扩展转换器的PWM调制器
公开(公告)号：US07816901B2
公开(公告)日：2010-10-19
申请号：US11975469
申请日：2007-10-19
申请人： Wenkai Wu , George Schuellein
发明人： Wenkai Wu , George Schuellein
IPC分类号： G05F1/40
CPC分类号： H02M3/1584 , H02M1/084
摘要： A PWM modulator for generating a PWM control signal for operating transistor switches of a phase of a multi-phase converter including a plurality of ramp generators, each ramp generator receiving a dedicated clock input signal corresponding to a phase of the multi-phase converter and providing a ramp signal starting when the dedicated clock signal is received by the ramp generator, one of the plurality of ramp generators being dedicated to provide the PWM control signal; a plurality of comparators, each comparator associated with a respective ramp generator for terminating the ramp signal when a predefined inequality exists between an error amplifier output of a feedback loop of the multi-phase converter and an output of the associated ramp generator; a plurality of current generator circuits, each current generator circuit associated with a respective ramp generator for providing current to the dedicated ramp generator to control the slope of the ramp signal of the dedicated ramp generator, the dedicated ramp generator controlling its associated comparator to provide the PWM control signal; and a plurality of current generator control circuits for controlling the operation of the plurality of current generator circuits.
摘要翻译：一种用于产生PWM控制信号的PWM调制器，用于操作包括多个斜坡发生器的多相转换器的相位的晶体管开关，每个斜坡发生器接收对应于多相转换器的相位的专用时钟输入信号，并提供当斜坡发生器接收到专用时钟信号时启动的斜坡信号，多个斜坡发生器之一专用于提供PWM控制信号; 多个比较器，每个比较器与相应的斜坡发生器相关联，用于当多相转换器的反馈回路的误差放大器输出和相关联的斜坡发生器的输出之间存在预定义的不等式时终止斜坡信号; 多个电流发生器电路，每个电流发生器电路与相应的斜坡发生器相关联，用于向专用斜坡发生器提供电流以控制专用斜坡发生器的斜坡信号的斜率，专用斜坡发生器控制其相关比较器，以提供 PWM控制信号; 以及用于控制多个电流发生器电路的操作的多个电流发生器控制电路。

14. 发明申请

US20080084717A1 Multi-phase buck converter with a plurality of coupled inductors 审中-公开
标题翻译：具有多个耦合电感器的多相降压转换器
公开(公告)号：US20080084717A1
公开(公告)日：2008-04-10
申请号：US11543461
申请日：2006-10-05
申请人： Wenkai Wu , Nai-chi Lee , George Schuellein
发明人： Wenkai Wu , Nai-chi Lee , George Schuellein
IPC分类号： H02M1/14
CPC分类号： H02M3/1584 , H02M2003/1586
摘要： A multi-phase converter comprising 2N+1 inductors; and 2N+1 switching converters parallel connected and each including a switched node; wherein N is an even integer, a pair of said inductors are coupled and wound about a common core and each said coupled inductor is connected at one pole thereof to a respective switched node and at another pole thereof to an output node, and at least one of said inductors is uncoupled from the other inductors.
摘要翻译：一种包括2N + 1个电感器的多相转换器; 和并联的2N + 1个开关转换器，并且每个包括开关节点; 其中N是偶数整数，一对所述电感器耦合并卷绕在公共芯上，并且每个所述耦合电感器在其一个极处连接到相应的开关节点，并且在另一个极点处连接到输出节点，并且至少一个的所述电感器与其它电感器分离。

15. 发明申请

US20080036526A1 CONTROL CIRCUIT FOR MULTI-PHASE CONVERTER 有权
标题翻译：多相转换器的控制电路
公开(公告)号：US20080036526A1
公开(公告)日：2008-02-14
申请号：US11835903
申请日：2007-08-08
申请人： Wenkai Wu , George Schuellein
发明人： Wenkai Wu , George Schuellein
IPC分类号： G05F1/10
CPC分类号： H02M3/1584 , H02M3/157
摘要： A control circuit for use in controlling a phase of a multi-phase voltage converter in accordance with an embodiment of the present invention includes a driver operable to provide a first control signal to a high side switch of a half-bridge of the phase and a second control signal to a low side switch of the half bridge, such that a desired output voltage is provided by the phase, current sensing circuitry operable to detect the output current of the phase, a comparator operable to compare the output current to a threshold current value and a disabling device operable to provide an enable/disable signal to disable the driver when the output current is below the threshold current value.
摘要翻译：根据本发明的实施例的用于控制多相电压转换器的相位的控制电路包括驱动器，其可操作以向所述相的半桥的高侧开关提供第一控制信号，以及第二控制信号提供给半桥的低侧开关，使得期望的输出电压由相位电流检测电路提供，可操作以检测相位的输出电流;比较器，可操作以将输出电流与阈值电流进行比较值和禁用装置，其可操作以在所述输出电流低于所述阈值电流值时提供使能/禁止信号以禁用所述驱动器。

16. 发明申请

US20080019436A1 PWM MODULATOR IN MULTI-PHASE CONVERTER 有权
标题翻译： PWM调制器在多相转换器中
公开(公告)号：US20080019436A1
公开(公告)日：2008-01-24
申请号：US11781595
申请日：2007-07-23
申请人： Wenkai Wu , George Schuellein
发明人： Wenkai Wu , George Schuellein
IPC分类号： H03K9/08 , H03K7/08
CPC分类号： H03K7/08 , H02M3/1584
摘要： A circuit for preventing inductor saturation during a step-up load transient in a multi-phase converter circuit where phases are turned ON sequentially by a shared clock signal with a fixed phase shift, each phase having high- and low-side switches series connected at a switching node, the circuit including at least one closed loop connected to at least one phase for providing ripple current cancellation in input and output sides of the multi-phase converter circuit; an oscillator circuit for providing a signal to turn ON and OFF the high- and low-side switches of each of the phases of the multi-phase converter circuit; and a detection circuit to detect the transient. The detect circuit includes an error amplifier circuit to receive input signals from an output of the multi-phase converter and to provide an error signal; and a clock oscillator frequency changing circuit receiving the error signal for increasing the clock oscillation frequency when said detection circuit detects a step-up load transient.
摘要翻译：一种用于在多相转换器电路中的升压负载瞬变期间防止电感饱和的电路，其中相位通过具有固定相移的共享时钟信号依次导通，每相具有串联连接的高低侧开关开关节点，所述电路包括连接到至少一个相的至少一个闭环，用于在多相转换器电路的输入和输出侧提供纹波电流消除; 振荡器电路，用于提供用于接通和断开多相转换器电路的每个相的高侧和低侧开关的信号; 以及用于检测瞬态的检测电路。检测电路包括误差放大器电路，用于从多相转换器的输出接收输入信号并提供误差信号; 以及时钟振荡器频率改变电路，当所述检测电路检测到升压负载瞬变时，接收用于增加时钟振荡频率的误差信号。

17. 发明授权

US06636430B1 Energy transfer concept in AC/DC switch mode power supply with power factor correction 有权
标题翻译： AC / DC开关电源中功率因数校正的能量传递概念
公开(公告)号：US06636430B1
公开(公告)日：2003-10-21
申请号：US10207300
申请日：2002-07-29
申请人： Issa Batarseh , Wenkai Wu , Weihong Qiu , Wei Gu
发明人： Issa Batarseh , Wenkai Wu , Weihong Qiu , Wei Gu
IPC分类号： H02M3335
CPC分类号： H02M1/4258 , Y02B70/126 , Y02P80/112
摘要： A new innovative concept in AC/DC cell that transfers energy to the output side directly from the input line, rather than from the storage capacitor in power factor correction (PFC) cell during the period that the line voltage exceeds a preset value. The new concept is based on providing additional winding coupled to the DC/DC transformer connected to the rectified input side to provide a path for the energy transfer from the line to transfer to the output directly (Boost cell) or to be stored in the output transformer (Flyback cell).
摘要翻译：在线路电压超过预设值的时期内，AC / DC电池的新创新理念将能量直接从输入线路传输到输出侧，而不是功率因数校正（PFC）单元中的存储电容器。新概念基于提供额外的绕组，其连接到连接到整流输入侧的DC / DC变压器，以提供用于从线路直接传输到输出（Boost cell）的能量传输或存储在输出端的路径变压器（反激电池）。

18. 发明授权

US06628106B1 Control method and circuit to provide voltage and current regulation for multiphase DC/DC converters 有权
标题翻译：为多相DC / DC转换器提供电压和电流调节的控制方法和电路
公开(公告)号：US06628106B1
公开(公告)日：2003-09-30
申请号：US10206565
申请日：2002-07-26
申请人： Issa Batarseh , Wei Gu , Jaber Abu-Qahouq , Wenkai Wu , Hong Mao
发明人： Issa Batarseh , Wei Gu , Jaber Abu-Qahouq , Wenkai Wu , Hong Mao
IPC分类号： H02M3156
CPC分类号： H02M3/1584
摘要： A multiphase DC/DC converter with voltage-mode hysteretic control and instantaneous current sharing functionality method and circuit. The disclosed method and circuit provides independent output voltage regulation and phases current regulation for the converter in two separate loops; one of which is concerned with voltage regulation preferably hysteretic regulation and the other which is concerned with phase current regulation. In one embodiment, each phase in the DC/DC converter is driven by a frequency divided signal derived directly from the output voltage ripple so that each phase has a switching frequency equal to the output voltage ripple frequency divided by the number of paralleled phase. In another embodiment, only the phase that carries the smallest current among a set of phases will be turned ON in each switching cycle to supply power to the output, avoiding multiple switching. Current sharing and regulation is achieved without shortening the ON time and with no multiple switching in any cycle.
摘要翻译：具有电压模式迟滞控制和瞬时电流共享功能方法和电路的多相DC / DC转换器。所公开的方法和电路在两个单独的环路中为转换器提供独立的输出电压调节和相电流调节; 其中之一涉及电压调节优选滞后调节，另一个涉及相电流调节。在一个实施例中，DC / DC转换器中的每个相位由直接从输出电压纹波导出的分频信号驱动，使得每个相位的开关频率等于输出电压纹波频率除以并联相位数。在另一个实施例中，只有在一组相位中承载最小电流的相位将在每个开关周期中导通，以向输出供电，从而避免多次开关。实现电流共享和调节，而不会缩短ON时间，并且在任何周期内不进行多重切换。

19. 发明公开

US20230299673A1 BUCK CONVERTER SYSTEM WITH AN ASYMMETRIC THRESHOLD VOLTAGE GATE DRIVE CIRCUIT DESIGN 审中-公开
公开(公告)号：US20230299673A1
公开(公告)日：2023-09-21
申请号：US17934749
申请日：2022-09-23
申请人： Wenkai Wu , Jialun Du , Weidong Zhu
发明人： Wenkai Wu , Jialun Du , Weidong Zhu
IPC分类号： H02M3/158 , H02M1/088
CPC分类号： H02M3/158 , H02M1/088
摘要： A buck converter with an asymmetric threshold voltage of its gate drive circuit design for improving power efficiency while keeping the gate drive design simple.

20. 发明公开

US20230230854A1 POWER MODULE PACKAGING SYSTEMS AND FABRICATION METHODS 审中-公开
公开(公告)号：US20230230854A1
公开(公告)日：2023-07-20
申请号：US17648246
申请日：2022-01-18
申请人： Wenkai Wu , Kevin Niu , Cheng Wei Chen
发明人： Wenkai Wu , Kevin Niu , Cheng Wei Chen
IPC分类号： H01L21/56
CPC分类号： H01L21/56
摘要： A method and system for fabricating a three-dimensional power module packaging structure is provided. The power module packaging method incorporates a one-time SMD-molding process, which simultaneously connects bare semiconductor dies and conductive pillars to the PCB substrate directly.

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