公开(公告)号：US08552699B2

公开(公告)日：2013-10-08

申请号：US13286346

申请日：2011-11-01

申请人： Zaki Moussaoui ,  Jifeng Qin ,  Colm Brazil

发明人： Zaki Moussaoui ,  Jifeng Qin ,  Colm Brazil

IPC分类号： G05F1/613 ,  G05F1/00

CPC分类号： H02M1/44 ,  H02M3/156 ,  H02M2001/0058 ,  Y02B70/1491

摘要： An EMI reduction network for a converter, the converter including upper and lower power switches provided between an input voltage node and a reference node. An inductance is coupled between the input voltage node and the upper switch at a first node, a capacitance and an auxiliary power switch are coupled in series between the first and reference nodes, and a controller is provided to control switching. The controller switches the upper switch based on a PWM signal. The controller keeps the lower switch turned on until the phase node goes positive while the upper switch is on. The controller turns the auxiliary switch on after the lower power switch is turned off and turns the auxiliary switch off after the upper power switch is turned off. The lower and auxiliary switches may be zero voltage switched, and the upper switch may be zero current switched.

摘要翻译： 一种用于转换器的EMI降低网络，该转换器包括设置在输入电压节点和参考节点之间的上和下功率开关。 电感耦合在第一节点处的输入电压节点和上部开关之间，电容和辅助电力开关串联耦合在第一参考节点和参考节点之间，并且提供控制器来控制切换。 控制器根据PWM信号切换上部开关。 控制器保持下部开关打开，直到相位节点变为正，而上部开关打开。 在下电源开关关闭后，控制器打开辅助开关，并在上电源开关关闭后关闭辅助开关。 下部和辅助开关可以是零电压切换，并且上部开关可以是零电流切换。

公开(公告)号：US20120262139A1

公开(公告)日：2012-10-18

申请号：US13286346

申请日：2011-11-01

申请人： Zaki Moussaoui ,  Jifeng Qin ,  Colm Brazil

发明人： Zaki Moussaoui ,  Jifeng Qin ,  Colm Brazil

IPC分类号： G05F1/00

CPC分类号： H02M1/44 ,  H02M3/156 ,  H02M2001/0058 ,  Y02B70/1491

摘要： An EMI reduction network for a converter, the converter including upper and lower power switches provided between an input voltage node and a reference node. An inductance is coupled between the input voltage node and the upper switch at a first node, a capacitance and an auxiliary power switch are coupled in series between the first and reference nodes, and a controller is provided to control switching. The controller switches the upper switch based on a PWM signal. The controller keeps the lower switch turned on until the phase node goes positive while the upper switch is on. The controller turns the auxiliary switch on after the lower power switch is turned off and turns the auxiliary switch off after the upper power switch is turned off The lower and auxiliary switches may be zero voltage switched, and the upper switch may be zero current switched.

摘要翻译： 一种用于转换器的EMI降低网络，该转换器包括设置在输入电压节点和参考节点之间的上和下功率开关。 电感耦合在第一节点处的输入电压节点和上部开关之间，电容和辅助电力开关串联耦合在第一和参考节点之间，并且提供控制器来控制切换。 控制器根据PWM信号切换上部开关。 控制器保持下部开关打开，直到相位节点变为正，而上部开关打开。 在下电源开关关闭后，控制器接通辅助开关，并在上电源开关关闭后关闭辅助开关。下开关和辅助开关可能为零电压切换，上开关可能为零电流切换。

公开(公告)号：US08441148B2

公开(公告)日：2013-05-14

申请号：US12796334

申请日：2010-06-08

申请人： Zaki Moussaoui ,  Jifeng Qin

发明人： Zaki Moussaoui ,  Jifeng Qin

IPC分类号： H02M3/02 ,  H02M3/16

摘要： A DC to DC converter comprises voltage regulation circuitry for generating at least two output voltages responsive to an input voltage. The voltage regulation circuitry further includes a plurality of main switches connected to receive the input voltage. A plurality of auxiliary switches is connected to provide the at least two output voltages. A single inductor is connected between the plurality of main switches and the plurality of auxiliary switches. A dual-output PWM controller provides a first PWM control signal for controlling the operation of the plurality of main switches responsive to a first feedback voltage from a first output voltage using a first control loop and provides a second PWM control signal for controlling the operation of the plurality of auxiliary switches responsive to a second feedback voltage from a second output voltage using a second control loop. Current mode control can be used for each control loop to reduce the cross regulation problem.

公开(公告)号：US20120049820A1

公开(公告)日：2012-03-01

申请号：US13094007

申请日：2011-04-26

申请人： Zaki Moussaoui ,  Jifeng Qin ,  Joseph Buxton

发明人： Zaki Moussaoui ,  Jifeng Qin ,  Joseph Buxton

IPC分类号： G05F1/618

CPC分类号： H02M1/36 ,  H02M3/1582

摘要： A system and method for reducing negative inductor current during soft start of a bidirectional direct current (DC)-to-DC converter is provided. Typically, the bidirectional DC-to-DC converter includes an active switch and a passive switch. The system employs a soft start circuit that controls the duty cycle of the passive switch during soft start of the active switch. In one aspect, the soft start circuit gradually increases the duty cycle of the passive switch from zero to a steady state value, and provides a soft start for the passive switch concurrently/simultaneously during the soft start of the active switch. Moreover, the soft start circuit disclosed herein can avoid the reverse transient inductor current during start-up, prevent system damage and make the design of the bidirectional DC-to-DC converter more robust.

摘要翻译： 提供了一种用于在双向直流（DC）至DC转换器的软启动期间减小负电感电流的系统和方法。 通常，双向DC-DC转换器包括有源开关和无源开关。 该系统采用软起动电路，在有源开关的软启动期间控制无源开关的占空比。 在一个方面，软启动电路逐渐将无源开关的占空比从零增加到稳态值，并且在有源开关的软启动期间同时/同时提供无源开关的软启动。 此外，本文公开的软启动电路可以避免启动期间的反向瞬态电感器电流，防止系统损坏并且使双向DC-DC转换器的设计更加坚固。

公开(公告)号：US08723490B2

公开(公告)日：2014-05-13

申请号：US13195423

申请日：2011-08-01

申请人： Zaki Moussaoui ,  Jifeng Qin ,  Joseph Buxton

发明人： Zaki Moussaoui ,  Jifeng Qin ,  Joseph Buxton

IPC分类号： G05F1/00

CPC分类号： H02M3/1588 ,  H02M2001/0003 ,  Y02B70/1466

摘要： A system and method for regulating power flow and limiting inductor current in a bidirectional direct current (DC)-to-DC converter is provided. In one aspect, a feedback circuit is provided to control power flow and/or limit inductor current based on the input/output voltage and/or current conditions in the bidirectional DC-DC converter. During a boost mode of operation, the duty cycle of a low-side switch within the bidirectional DC-DC converter is reduced, based on an analysis of the high-side voltage and positive inductor current. Further, during a buck mode of operation, the duty cycle of the low-side switch is increased, based on an analysis of the low-side voltage and negative inductor current. Moreover, the duty cycle of the low-side switch is adjusted, such that, the high-side voltage, low-side voltage and inductor current (in both directions) do not exceed preset threshold and the bidirectional DC-DC converter returns to a steady state.

摘要翻译： 提供了一种用于调节双向直流（DC）至DC转换器中的电流和限制电感电流的系统和方法。 在一个方面，提供反馈电路以基于双向DC-DC转换器中的输入/输出电压和/或电流条件来控制功率流和/或限制电感器电流。 在升压工作模式下，基于对高侧电压和正电感电流的分析，降低了双向DC-DC转换器内的低侧开关的占空比。 此外，在降压操作模式下，基于低侧电压和负电感器电流的分析，低侧开关的占空比增加。 此外，调节低侧开关的占空比，使得高侧电压，低侧电压和电感器电流（两个方向）不超过预设阈值，并且双向DC-DC转换器返回到 稳定状态。

公开(公告)号：US20120049772A1

公开(公告)日：2012-03-01

申请号：US13195423

申请日：2011-08-01

申请人： Zaki Moussaoui ,  Jifeng Qin ,  Joseph Buxton

发明人： Zaki Moussaoui ,  Jifeng Qin ,  Joseph Buxton

IPC分类号： H02P3/14 ,  G05F1/10

CPC分类号： H02M3/1588 ,  H02M2001/0003 ,  Y02B70/1466

摘要： A system and method for regulating power flow and limiting inductor current in a bidirectional direct current (DC)-to-DC converter is provided. In one aspect, a feedback circuit is provided to control power flow and/or limit inductor current based on the input/output voltage and/or current conditions in the bidirectional DC-DC converter. During a boost mode of operation, the duty cycle of a low-side switch within the bidirectional DC-DC converter is reduced, based on an analysis of the high-side voltage and positive inductor current. Further, during a buck mode of operation, the duty cycle of the low-side switch is increased, based on an analysis of the low-side voltage and negative inductor current. Moreover, the duty cycle of the low-side switch is adjusted, such that, the high-side voltage, low-side voltage and inductor current (in both directions) do not exceed preset threshold and the bidirectional DC-DC converter returns to a steady state.

摘要翻译： 提供了一种用于调节双向直流（DC）至DC转换器中的电流和限制电感电流的系统和方法。 在一个方面，提供反馈电路以基于双向DC-DC转换器中的输入/输出电压和/或电流条件来控制功率流和/或限制电感器电流。 在升压工作模式下，基于对高侧电压和正电感电流的分析，降低了双向DC-DC转换器内的低侧开关的占空比。 此外，在降压操作模式下，基于低侧电压和负电感器电流的分析，低侧开关的占空比增加。 此外，调节低侧开关的占空比，使得高侧电压，低侧电压和电感器电流（两个方向）不超过预设阈值，并且双向DC-DC转换器返回到 稳定状态。

公开(公告)号：US08503194B2

公开(公告)日：2013-08-06

申请号：US12899915

申请日：2010-10-07

申请人： Zaki Moussaoui ,  Jifeng Qin

发明人： Zaki Moussaoui ,  Jifeng Qin

IPC分类号： H02M3/335 ,  H02M3/24

CPC分类号： H02M3/33584

摘要： An embodiment of a multidirectional signal converter includes first and second converter nodes, a transformer, and first and second stages. The transformer includes first and second windings, and the first stage is coupled between the first converter node and the first winding of the transformer. The second stage includes a first node coupled to the second converter node, a second node coupled to a node of the second winding of the transformer, and a filter node, is operable as a boost converter while current is flowing out from the second converter node, and is operable as a buck converter while current is flowing out from the first converter node. For example, in an embodiment, such a multidirectional signal converter may be a bidirectional voltage converter that handles power transfer between two loads. Such a voltage converter may have improved conversion efficiency and a smaller size and lower component count as compared to a conventional multidirectional voltage converter. Furthermore, such a voltage converter may be operable with a common switching scheme regardless of the direction of power transfer, and without the need for an indicator of the instantaneous direction of power flow.

摘要翻译： 多向信号转换器的实施例包括第一和第二转换器节点，变压器以及第一和第二级。 变压器包括第一和第二绕组，并且第一级耦合在第一转换器节点和变压器的第一绕组之间。 第二级包括耦合到第二转换器节点的第一节点，耦合到变压器的第二绕组的节点的第二节点和滤波器节点，当电流从第二转换器节点流出时可用作升压转换器 ，并且当电流从第一转换器节点流出时可用作降压转换器。 例如，在一个实施例中，这种多向信号转换器可以是处理两个负载之间的功率传输的双向电压转换器。 与传统的多向电压转换器相比，这种电压转换器可以具有改进的转换效率和更小的尺寸和更低的元件数量。 此外，这种电压转换器可以与公共开关方案一起操作，而不管功率传输的方向如何，并且不需要功率流的瞬时方向的指示。

公开(公告)号：US08570769B2

公开(公告)日：2013-10-29

申请号：US12899800

申请日：2010-10-07

申请人： Zaki Moussaoui ,  Jifeng Qin

发明人： Zaki Moussaoui ,  Jifeng Qin

IPC分类号： H02M3/22

CPC分类号： H02M3/33584

摘要： An embodiment of a controller for a multidirectional signal converter is operable to cause the converter to regulate a first signal at a first converter node, and to have a switch timing that is independent of a direction of power transfer between the first converter node and a second converter node. For example, in an embodiment, such a controller may be part of a bidirectional voltage converter that handles power transfer between two loads. Such a voltage converter may have improved conversion efficiency and a smaller size and lower component count as compared to a conventional multidirectional voltage converter. Furthermore, such a voltage converter may be operable with a common switching scheme regardless of the direction of power transfer, and without the need for an indicator of the instantaneous direction of power flow.

摘要翻译： 用于多向信号转换器的控制器的实施例可操作以使得转换器调节第一转换器节点处的第一信号，并且具有与第一转换器节点和第二转换器节点之间的功率传输方向无关的开关定时 转换器节点。 例如，在一个实施例中，这样的控制器可以是处理两个负载之间的功率传输的双向电压转换器的一部分。 与传统的多向电压转换器相比，这种电压转换器可以具有改进的转换效率和更小的尺寸和更低的元件数量。 此外，这种电压转换器可以与公共开关方案一起操作，而不管功率传输的方向如何，并且不需要功率流的瞬时方向的指示。

公开(公告)号：US08570006B2

公开(公告)日：2013-10-29

申请号：US13303702

申请日：2011-11-23

申请人： Zaki Moussaoui ,  Jun Liu

发明人： Zaki Moussaoui ,  Jun Liu

IPC分类号： G05F1/40

CPC分类号： H02M3/1582 ,  H02M2001/0003

摘要： A circuit, device, and method for controlling a buck-boost circuit includes a bootstrap capacitor voltage regulator circuit and a comparator circuit. The bootstrap capacitor voltage regulator circuit is electrically coupled to a buck-mode bootstrap capacitor of the buck-boost converter and to a boost-mode bootstrap capacitor of the buck-boost converter. The comparator circuit is configured to control the bootstrap capacitor voltage regulator circuit to maintain a voltage of the bootstrap capacitors above a reference threshold voltage by transferring an amount energy from one of the bootstrap capacitors to the other bootstrap capacitors based on the particular mode of operation of the buck-boost converter.

摘要翻译： 用于控制降压 - 升压电路的电路，装置和方法包括自举电容器电压调节器电路和比较器电路。 自举电容器电压调节器电路电耦合到降压 - 升压转换器的降压模式自举电容器和降压 - 升压转换器的升压模式自举电容器。 比较器电路被配置为通过基于特定的操作模式将自举电容器电压调节器电路保持自举电容器的电压高于参考阈值电压，通过从自举电容器中的一个向另一个自举电容器传输一定量的能量 降压 - 升压转换器。

公开(公告)号：US08552703B2

公开(公告)日：2013-10-08

申请号：US13109299

申请日：2011-05-17

申请人： Jun Liu ,  Zaki Moussaoui ,  Kenneth L. Lenk

发明人： Jun Liu ,  Zaki Moussaoui ,  Kenneth L. Lenk

IPC分类号： G05F1/00

CPC分类号： G05F1/56 ,  H02M3/1588 ,  H02M2001/0032 ,  H02M2001/0045 ,  Y02B70/1466 ,  Y02B70/16

摘要： A regulator controller which controls conversion of an input voltage to an output voltage, including a switching regulator, a low dropout (LDO) regulator, and a mode controller. The switching regulator develops a pulse control signal to regulate the output voltage when enabled. The LDO regulator also regulates the output voltage when enabled. The mode controller enables or disables the switching regulator and the LDO regulator based on a load condition. The switching regulator is enabled and the LDO regulator is disabled during normal operation. The LDO regulator is enabled when the low load condition is detected, such as a skipped pulse on the pulse control signal. The switching regulator is disabled when the pulse control signal reaches a minimum level. The LDO regulator is disabled and the switching regulator is re-enabled based on threshold conditions of the current output of the LDO regulator.

摘要翻译： 调节器控制器，其控制输入电压到输出电压的转换，包括开关稳压器，低压差（LDO）调节器和模式控制器。 开关稳压器产生脉冲控制信号，以便在使能时调节输出电压。 LDO调节器在使能时也调节输出电压。 模式控制器根据负载条件启用或禁用开关稳压器和LDO稳压器。 开关稳压器使能，LDO稳压器在正常工作期间被禁止。 当检测到低负载条件时，例如脉冲控制信号上的跳过脉冲，LDO稳压器被使能。 当脉冲控制信号达到最小电平时，开关稳压器被禁止。 LDO稳压器被禁止，并且基于LDO稳压器的电流输出的阈值条件重新使能开关稳压器。