公开(公告)号：US08520414B2

公开(公告)日：2013-08-27

申请号：US12689771

申请日：2010-01-19

申请人： Paul Garrity ,  Zaohong Yang

发明人： Paul Garrity ,  Zaohong Yang

IPC分类号： H02M3/335

CPC分类号： H02M3/33569

摘要： A controller for a power converter having a transformer T1 with a primary winding coupled to a power switch SW and a secondary winding coupled to a synchronous rectifier switch SR. In one embodiment, the controller includes a first controller configured to control a conductivity of the power switch SW, and a first delay circuit configured to delay an initiation of the conductivity of the power switch SW. The controller also includes a second controller configured to control a conductivity of the synchronous rectifier switch SR as a function of a voltage difference between two terminals thereof, and a second delay circuit configured to delay an initiation of the conductivity of the synchronous rectifier switch SR. The controller still further includes a shutdown circuit configured to substantially disable conductivity of the synchronous rectifier switch SR before the initiation of conductivity of the power switch SW.

摘要翻译： 一种用于功率转换器的控制器，其具有变压器T1，其具有耦合到功率开关SW的初级绕组和耦合到同步整流器开关SR的次级绕组。 在一个实施例中，控制器包括被配置为控制电力开关SW的电导率的第一控制器和被配置为延迟电源开关SW的电导率的启动的第一延迟电路。 控制器还包括第二控制器，其被配置为根据其两个端子之间的电压差来控制同步整流器开关SR的电导率，以及第二延迟电路，其被配置为延迟同步整流开关SR的电导率的启动。 控制器还包括关断电路，其被配置为在电源开关SW的导通性开始之前基本上禁用同步整流器开关SR的导通性。

公开(公告)号：US09088216B2

公开(公告)日：2015-07-21

申请号：US12689881

申请日：2010-01-19

申请人： Paul Garrity ,  Zaohong Yang

发明人： Paul Garrity ,  Zaohong Yang

IPC分类号： H02M7/217 ,  H02M7/219 ,  H02M1/42 ,  H02M7/00

CPC分类号： H02M7/219 ,  H02M1/4225 ,  Y02B70/126 ,  Y02B70/1408

摘要： A controller for a power converter and method of operating the same employable with a bridge rectifier having first and second synchronous rectifier switches. In one embodiment, the controller includes an amplifier configured to enable a turn-on delay for the first synchronous rectifier switch. The controller also includes a discharge switch having first and second switched terminals coupled to gate and source terminals, respectively, of the first synchronous rectifier switch and configured to discharge a gate-to-source capacitance of the first synchronous rectifier switch to enable a turn off thereof.

摘要翻译： 一种用于功率转换器的控制器及其操作方法，其可用具有第一和第二同步整流器开关的桥式整流器。 在一个实施例中，控制器包括放大器，该放大器被配置为使能第一同步整流器开关的接通延迟。 控制器还包括放电开关，其具有分别与第一同步整流开关的栅极和源极端子耦合的第一和第二开关端子，并且被配置为放电第一同步整流器开关的栅极 - 源极电容以使得能够关断 其中。

公开(公告)号：US08787044B2

公开(公告)日：2014-07-22

申请号：US12776249

申请日：2010-05-07

申请人： Zaohong Yang ,  Paul Garrity

发明人： Zaohong Yang ,  Paul Garrity

IPC分类号： H02M3/335

CPC分类号： H02M3/33576 ,  H02M2001/346 ,  Y02B70/1491

摘要： An energy recovery snubber circuit for use in switching power converters. The power converters may include a switch network coupled to a primary winding of an isolation transformer, and rectification circuitry coupled to a secondary winding of the isolation transformer. The energy recovery snubber circuit may include clamping circuitry that is operative to clamp voltage spikes and/or ringing at the rectification circuitry. The clamped voltages may be captured by an energy capture module, such as a capacitor. Further, the energy recovery snubber circuitry may include control circuitry operative to return the energy captured by the energy capture module to the input of the power converter. To maintain electrical isolation between a primary side and a secondary side of the isolation transformer, a second isolation transformer may be provided to return the captured energy back to the input of the power converter.

摘要翻译： 用于开关电源转换器的能量恢复缓冲电路。 功率转换器可以包括耦合到隔离变压器的初级绕组的开关网络，以及耦合到隔离变压器的次级绕组的整流电路。 能量恢复缓冲电路可以包括钳位电路，其可操作地钳位整流电路的电压尖峰和/或振铃。 夹紧的电压可以由诸如电容器的能量捕获模块捕获。 此外，能量恢复缓冲电路可以包括控制电路，其可操作以将由能量捕获模块捕获的能量返回到功率转换器的输入端。 为了保持隔离变压器的初级侧和次级侧之间的电隔离，可以提供第二隔离变压器以将捕获的能量返回到功率转换器的输入端。

公开(公告)号：US07746040B2

公开(公告)日：2010-06-29

申请号：US12101353

申请日：2008-04-11

申请人： Paul Garrity ,  Zaohong Yang

发明人： Paul Garrity ,  Zaohong Yang

IPC分类号： G05F1/70

CPC分类号： H02M1/4225 ,  Y02B70/126

摘要： An input current shaping AC to DC converter with PFC front end that reduces input current harmonics is provided. In one embodiment, an AC to DC converter connectable with an alternating current source and operable to output a direct current has a PFC front end followed by a DC/DC converter. The PFC front end reduces harmonic components present in an input current waveform received by the PFC front end from the alternating current source and includes current steering circuitry and, optionally, valley filling circuitry. The DC/DC converter is one that presents pure resistive input impedance to the PFC front end. The DC/DC converter outputs the direct current to a load connected thereto.

摘要翻译： 提供一种具有PFC前端的输入电流整形AC至DC转换器，可降低输入电流谐波。 在一个实施例中，可与交流电源连接并可操作以输出直流电的AC至DC转换器具有PFC前端以及DC / DC转换器。 PFC前端减少由PFC前端从交流电源接收的输入电流波形中存在的谐波分量，并包括电流控制电路和任选的谷值灌注电路。 DC / DC转换器是向PFC前端呈现纯电阻输入阻抗的转换器。 DC / DC转换器将直流电流输出到连接到其上的负载。

公开(公告)号：US20100315839A1

公开(公告)日：2010-12-16

申请号：US12776249

申请日：2010-05-07

申请人： Zaohong Yang ,  Paul Garrity

发明人： Zaohong Yang ,  Paul Garrity

IPC分类号： H02M3/335

CPC分类号： H02M3/33576 ,  H02M2001/346 ,  Y02B70/1491

摘要： An energy recovery snubber circuit for use in switching power converters. The power converters may include a switch network coupled to a primary winding of an isolation transformer, and rectification circuitry coupled to a secondary winding of the isolation transformer. The energy recovery snubber circuit may include clamping circuitry that is operative to clamp voltage spikes and/or ringing at the rectification circuitry. The clamped voltages may be captured by an energy capture module, such as a capacitor. Further, the energy recovery snubber circuitry may include control circuitry operative to return the energy captured by the energy capture module to the input of the power converter. To maintain electrical isolation between a primary side and a secondary side of the isolation transformer, a second isolation transformer may be provided to return the captured energy back to the input of the power converter.

摘要翻译： 用于开关电源转换器的能量恢复缓冲电路。 功率转换器可以包括耦合到隔离变压器的初级绕组的开关网络，以及耦合到隔离变压器的次级绕组的整流电路。 能量恢复缓冲电路可以包括钳位电路，其可操作地钳位整流电路的电压尖峰和/或振铃。 夹紧的电压可以由诸如电容器的能量捕获模块捕获。 此外，能量恢复缓冲电路可以包括控制电路，其可操作以将由能量捕获模块捕获的能量返回到功率转换器的输入端。 为了保持隔离变压器的初级侧和次级侧之间的电隔离，可以提供第二隔离变压器以将捕获的能量返回到功率转换器的输入端。

公开(公告)号：US20100188876A1

公开(公告)日：2010-07-29

申请号：US12689881

申请日：2010-01-19

申请人： Paul Garrity ,  Zaohong Yang

发明人： Paul Garrity ,  Zaohong Yang

IPC分类号： H02M7/217

CPC分类号： H02M7/219 ,  H02M1/4225 ,  Y02B70/126 ,  Y02B70/1408

摘要： A controller for a power converter and method of operating the same employable with a bridge rectifier having first and second synchronous rectifier switches. In one embodiment, the controller includes an amplifier configured to enable a turn-on delay for the first synchronous rectifier switch SR. The controller also includes a discharge switch Q3 having first and second switched terminals coupled to gate and source terminals, respectively, of the first synchronous rectifier switch SR and configured to discharge a gate-to-source capacitance of the first synchronous rectifier switch SR to enable a turn off thereof.

摘要翻译： 一种用于功率转换器的控制器及其操作方法，其可用具有第一和第二同步整流器开关的桥式整流器。 在一个实施例中，控制器包括放大器，其被配置为使能第一同步整流器开关SR的接通延迟。 控制器还包括放电开关Q3，其具有分别与第一同步整流开关SR的栅极和源极端子耦合的第一和第二开关端子，并且被配置为放电第一同步整流器开关SR的栅极 - 源极电容以使能 关掉它。

公开(公告)号：US20100182806A1

公开(公告)日：2010-07-22

申请号：US12689771

申请日：2010-01-19

申请人： Paul Garrity ,  Zaohong Yang

发明人： Paul Garrity ,  Zaohong Yang

IPC分类号： H02M3/335

CPC分类号： H02M3/33569

摘要： A controller for a power converter having a transformer T1 with a primary winding coupled to a power switch SW and a secondary winding coupled to a synchronous rectifier switch SR. In one embodiment, the controller includes a first controller configured to control a conductivity of the power switch SW, and a first delay circuit configured to delay an initiation of the conductivity of the power switch SW. The controller also includes a second controller configured to control a conductivity of the synchronous rectifier switch SR as a function of a voltage difference between two terminals thereof, and a second delay circuit configured to delay an initiation of the conductivity of the synchronous rectifier switch SR. The controller still further includes a shutdown circuit configured to substantially disable conductivity of the synchronous rectifier switch SR before the initiation of conductivity of the power switch SW.

摘要翻译： 一种用于功率转换器的控制器，其具有变压器T1，其具有耦合到功率开关SW的初级绕组和耦合到同步整流器开关SR的次级绕组。 在一个实施例中，控制器包括被配置为控制电力开关SW的电导率的第一控制器和被配置为延迟电源开关SW的电导率的启动的第一延迟电路。 控制器还包括第二控制器，其被配置为根据其两个端子之间的电压差来控制同步整流器开关SR的电导率，以及第二延迟电路，其被配置为延迟同步整流开关SR的电导率的启动。 控制器还包括关断电路，其被配置为在电源开关SW的导通性开始之前基本上禁用同步整流器开关SR的导通性。

公开(公告)号：US20090257256A1

公开(公告)日：2009-10-15

申请号：US12101353

申请日：2008-04-11

申请人： Paul Garrity ,  Zaohong Yang

发明人： Paul Garrity ,  Zaohong Yang

IPC分类号： H02M7/04

CPC分类号： H02M1/4225 ,  Y02B70/126

摘要： A high efficient input current shaping AC to DC converter with PFC front end that reduces input current harmonics is provided. In one embodiment, an AC to DC converter connectable with an alternating current source and operable to output a direct current comprises a PFC front end followed by a DC/DC converter. The PFC front end reduces harmonic components present in an input current waveform received by the PFC front end from the alternating current source and includes current steering circuitry and, optionally, valley filling circuitry. The DC/DC converter comprises one that presents pure resistive input impedance to the PFC front end. The DC/DC converter outputs the direct current to a load connected thereto.

摘要翻译： 提供了具有降低输入电流谐波的具有PFC前端的高效输入电流整形AC至DC转换器。 在一个实施例中，可与交流电源连接并且可操作以输出直流电的AC至DC转换器包括PFC前端以及DC / DC转换器。 PFC前端减少由PFC前端从交流电源接收的输入电流波形中存在的谐波分量，并包括电流控制电路和任选的谷值灌注电路。 DC / DC转换器包括向PFC前端呈现纯电阻输入阻抗的DC / DC转换器。 DC / DC转换器将直流电流输出到连接到其上的负载。

公开(公告)号：US20110305047A1

公开(公告)日：2011-12-15

申请号：US13050494

申请日：2011-03-17

申请人： Aaron Jungreis ,  Antony Brinlee ,  Paul Garrity

发明人： Aaron Jungreis ,  Antony Brinlee ,  Paul Garrity

IPC分类号： H02M3/335

CPC分类号： H02M3/33523 ,  H02M1/08 ,  Y02B70/1433

摘要： A power converter employing a control system configured to make multiple functional use of a circuit node therein and method of operating the same. In one embodiment, the power converter includes a power train including at least one power switch. The power converter also includes a control system including an opto-isolator circuit, including a resistor, configured to receive an output signal from the power converter and provide a feedback signal to a feedback node for the control system to provide a switch control signal for the at least one power switch. The control system also includes a current source configured to produce multiple voltage levels at the feedback node in accordance with the resistor, thereby enabling multiple functional uses of the feedback node.

摘要翻译： 一种采用控制系统的功率转换器，其配置为使得其中的电路节点的多个功能使用及其操作方法。 在一个实施例中，功率转换器包括包括至少一个功率开关的动力传动系。 功率转换器还包括控制系统，其包括光隔离器电路，其包括电阻器，其被配置为从功率转换器接收输出信号，并向控制系统的反馈节点提供反馈信号以提供用于控制系统的开关控制信号 至少一个电源开关。 控制系统还包括被配置为根据电阻器在反馈节点处产生多个电压电平的电流源，从而实现反馈节点的多个功能使用。

公开(公告)号：US08514593B2

公开(公告)日：2013-08-20

申请号：US12486520

申请日：2009-06-17

申请人： Antony Brinlee ,  Aaron Jungreis ,  Arturo Silva ,  Paul Garrity

发明人： Antony Brinlee ,  Aaron Jungreis ,  Arturo Silva ,  Paul Garrity

IPC分类号： H02M3/335

CPC分类号： H02M3/28 ,  H01F3/14

摘要： A power converter including a power switch, a controller for controlling a switching frequency thereof, and a magnetic device with a non-uniform gap. In one embodiment, the power converter includes a power switch and a magnetic device coupled to the power switch and having a non-uniform gap. The power converter also includes a controller having a detector configured to sense a condition representing an output power of the power converter. A control circuit of the controller is configured to control a switching frequency of the power switch as a function of the condition and control a duty cycle of the power switch to regulate an output characteristic of the power converter.

摘要翻译： 一种功率转换器，包括电源开关，用于控制其开关频率的控制器和具有不均匀间隙的磁性装置。 在一个实施例中，功率转换器包括电源开关和耦合到电源开关并具有非均匀间隙的磁性装置。 功率转换器还包括具有检测器的控制器，其被配置为感测表示功率转换器的输出功率的状态。 控制器的控制电路被配置为根据条件控制电源开关的开关频率，并且控制电源开关的占空比以调节功率转换器的输出特性。