公开(公告)号：US20080019158A1

公开(公告)日：2008-01-24

申请号：US11459179

申请日：2006-07-21

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。

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。

公开(公告)号：US07449867B2

公开(公告)日：2008-11-11

申请号：US11459179

申请日：2006-07-21

申请人： Wenkai Wu ,  Nai-chi Lee ,  George Schuellein

发明人： Wenkai Wu ,  Nai-chi Lee ,  George Schuellein

IPC分类号： G05F1/59 ,  G05F1/62

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.

公开(公告)号：US20080197823A1

公开(公告)日：2008-08-21

申请号：US12030269

申请日：2008-02-13

申请人： Mark Crowther ,  Wenkai Wu ,  George Schuellein

发明人： Mark Crowther ,  Wenkai Wu ,  George Schuellein

IPC分类号： G05F1/40 ,  G05F1/10

CPC分类号： H02M3/1584

摘要： A multiphase converter comprising a plurality of converter circuits, each converter circuit having series connected high and low side switches connected across a voltage bus with a common node provided therebetween, each of the common nodes connected through a respective inductor to an output node of the converter coupled to a load, the high and low side switches each being controlled by a control circuit to provide a desired output voltage at the output node, the control circuit including a first circuit for disabling and enabling at least one phase in response to a condition of the load, the circuit causing the high side switch to be turned on prior to the lower side switch when a disabled phase is enabled.

摘要翻译： 一种多相转换器，包括多个转换器电路，每个转换器电路具有连接在电压总线上的串联连接的高侧和低侧开关，其间设置有公共节点，每个公共节点通过相应的电感器连接到转换器的输出节点 耦合到负载，高低侧开关各自由控制电路控制以在输出节点处提供期望的输出电压，所述控制电路包括用于响应于第一电路的条件而禁用并使能至少一个相位的第一电路 当禁用相位被使能时，负载，导致高侧开关在下侧开关之前导通的电路。

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。

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。

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。

公开(公告)号：US07982441B2

公开(公告)日：2011-07-19

申请号：US12030269

申请日：2008-02-13

申请人： Mark Crowther ,  Wenkai Wu ,  George Schuellein

发明人： Mark Crowther ,  Wenkai Wu ,  George Schuellein

IPC分类号： G05F1/40

CPC分类号： H02M3/1584

摘要： A multiphase converter comprising a plurality of converter circuits, each converter circuit having series connected high and low side switches connected across a voltage bus with a common node provided therebetween, each of the common nodes connected through a respective inductor to an output node of the converter coupled to a load, the high and low side switches each being controlled by a control circuit to provide a desired output voltage at the output node, the control circuit including a first circuit for disabling and enabling at least one phase in response to a condition of the load, the circuit causing the high side switch to be turned on prior to the lower side switch when a disabled phase is enabled.

摘要翻译： 一种多相转换器，包括多个转换器电路，每个转换器电路具有连接在电压总线上的串联连接的高侧和低侧开关，其间设置有公共节点，每个公共节点通过相应的电感器连接到转换器的输出节点 耦合到负载，高低侧开关各自由控制电路控制以在输出节点处提供期望的输出电压，所述控制电路包括用于响应于第一电路的条件而禁用并使能至少一个相位的第一电路 当禁用相位被使能时，负载，导致高侧开关在下侧开关之前导通的电路。

公开(公告)号：US07888918B2

公开(公告)日：2011-02-15

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： G05F1/00

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。

公开(公告)号：US20080054971A1

公开(公告)日：2008-03-06

申请号：US11774242

申请日：2007-07-06

申请人： Wenkai Wu ,  George Schuellein

发明人： Wenkai Wu ,  George Schuellein

IPC分类号： H03K7/00 ,  H03K7/08

CPC分类号： H03K7/08

摘要： A pulse width modulation control circuit for providing a pulse width modulation signal in accordance with an embodiment of the present application includes a comparator operable to compare a first input to a second input and to provide the pulse width modulation signal based on the comparison, wherein the first input is an error signal and the second input is a ramp signal, wherein a first portion of the ramp is a decreasing ramp signal having a first slew rate and a second portion of the ramp signal is an increasing ramp signal having a second slew rate.

摘要翻译： 根据本申请的实施例的用于提供脉宽调制信号的脉冲宽度调制控制电路包括比较器，用于将第一输入与第二输入进行比较，并且基于该比较来提供脉宽调制信号，其中， 第一输入是误差信号，第二输入是斜坡信号，其中斜坡的第一部分是具有第一压摆率的递减斜坡信号，斜坡信号的第二部分是具有第二压摆率的增加斜坡信号 。