公开(公告)号：US07560912B2

公开(公告)日：2009-07-14

申请号：US11380064

申请日：2006-04-25

申请人： Ming Xu ,  Yuancheng Ren ,  Fred C. Lee ,  Andrew P. Schmit

发明人： Ming Xu ,  Yuancheng Ren ,  Fred C. Lee ,  Andrew P. Schmit

IPC分类号： G05F1/571 ,  H02H3/22

CPC分类号： H02M3/158 ,  H02M2001/0045

摘要： An active linear regulator circuit in parallel with a filter capacitor of a switching voltage regulator injects current to a load only when the switching regulator and capacitor cannot supply adequate current to follow high frequency load transients in a manner which is compatible with adaptive voltage positioning (AVP) requirements. control of current injection and determination of the insufficiency of current from the switching regulator and capacitors is achieved by impedance matching of the linear regulator to the switching regulator. The linear regulator thus operates at relatively low current and duty cycle to limit power dissipation therein. By matching impedances and increasing the bandwidth of the switching regulator, filter capacitor requirements can be reduced to the point of being met entirely by packaging and/or on-die capacitors which may be placed close to or at the point of load to reduce parasitic inductance, as can the linear regulator.

摘要翻译： 只有当开关稳压器和电容器不能以与自适应电压定位（AVP）兼容的方式提供足够的电流来跟随高频负载瞬变时，与开关电压调节器的滤波电容器并联的有源线性稳压器电路将电流注入到负载 ） 要求。 通过线性稳压器与开关调节器的阻抗匹配来实现电流注入的控制和确定开关调节器和电容器的电流不足。 因此，线性调节器在相对低的电流和占空比下操作以限制其中的功率耗散。 通过匹配阻抗并增加开关稳压器的带宽，可以将滤波电容器的要求降低到完全通过封装和/或片上电容器来满足要求，这些电容器可以放置在接近或负载点以减小寄生电感 ，线性调节器也可以。

公开(公告)号：US20090174378A1

公开(公告)日：2009-07-09

申请号：US12401815

申请日：2009-03-11

申请人： Ming Xu ,  Yuancheng Ren ,  Fred C. Lee ,  Andrew P. Schmit

发明人： Ming Xu ,  Yuancheng Ren ,  Fred C. Lee ,  Andrew P. Schmit

IPC分类号： G05F1/00

CPC分类号： H02M3/158 ,  H02M2001/0045

摘要： An active linear regulator circuit in parallel with a filter capacitor of a switching voltage regulator injects current to a load only when the switching regulator and capacitor cannot supply adequate current to follow high frequency load transients in a manner which is compatible with adaptive voltage positioning (AVP) requirements. control of current injection and determination of the insufficiency of current from the switching regulator and capacitors is achieved by impedance matching of the linear regulator to the switching regulator. The linear regulator thus operates at relatively low current and duty cycle to limit power dissipation therein. By matching impedances and increasing the bandwidth of the switching regulator, filter capacitor requirements can be reduced to the point of being met entirely by packaging and/or on-die capacitors which may be placed close to or at the point of load to reduce parasitic inductance, as can the linear regulator.

摘要翻译： 只有当开关稳压器和电容器不能以与自适应电压定位（AVP）兼容的方式提供足够的电流来跟随高频负载瞬变时，与开关电压调节器的滤波电容器并联的有源线性稳压器电路将电流注入到负载 ） 要求。 通过线性稳压器与开关调节器的阻抗匹配来实现电流注入的控制和确定开关调节器和电容器的电流不足。 因此，线性调节器在相对低的电流和占空比下操作以限制其中的功率耗散。 通过匹配阻抗并增加开关稳压器的带宽，可以将滤波电容器的要求降低到完全通过封装和/或片上电容器来满足要求，这些电容器可以放置在接近或负载点以减小寄生电感 ，线性调节器也可以。

公开(公告)号：US20060087304A1

公开(公告)日：2006-04-27

申请号：US10969215

申请日：2004-10-21

申请人： Yuancheng Ren ,  Fred Lee

发明人： Yuancheng Ren ,  Fred Lee

IPC分类号： H01F21/00

CPC分类号： H02M1/38 ,  H01F3/14 ,  H01F30/04 ,  H02M3/1588 ,  H03K17/08122 ,  Y02B70/1466

摘要： A buck converter has a driver circuit with a drive transformer that provides complementary voltages to the buck converter switches. The drive transformer may have two secondary windings, with one winding for each converter switch. As one converter switch experiences a rising gate voltage, the other converter switch experiences a falling gate voltage. Since both converter switches are controlled by the same driver switches, the converter switch dead time is very small. Preferably, at least one converter switch has a voltage shift circuit connected to the gate electrode. Adjustment of the voltage shift magnitude will advance or delay the turn on and turn off times of the switch. Hence, the converter switch dead time can be precisely adjusted by varying the voltage shift magnitude. Preferably, the converter switch dead time is less than 1 or 2 nanoseconds.

摘要翻译： 降压转换器具有驱动电路，其中驱动变压器为降压转换器开关提供互补电压。 驱动变压器可以具有两个次级绕组，每个转换器开关具有一个绕组。 当一个转换器开关经历上升栅极电压时，另一个转换器开关经历栅极电压下降。 由于两个转换器开关由相同的驱动器开关控制，所以转换器开关死区时间非常小。 优选地，至少一个转换器开关具有连接到栅电极的电压移位电路。 电压偏移幅度的调整将推进或延迟开关的导通和关闭时间。 因此，可以通过改变电压偏移量来精确地调整转换器开关死区时间。 优选地，转换器开关死区时间小于1或2纳秒。

公开(公告)号：US08907592B2

公开(公告)日：2014-12-09

申请号：US13048730

申请日：2011-03-15

申请人： Jin Hu ,  Lei Du ,  Yuancheng Ren ,  Junming Zhang ,  Zhijun Ye

发明人： Jin Hu ,  Lei Du ,  Yuancheng Ren ,  Junming Zhang ,  Zhijun Ye

IPC分类号： H05B37/02 ,  H05B33/08

CPC分类号： H05B33/0827 ,  H05B33/0809 ,  H05B33/0812 ,  Y02B20/341

摘要： Embodiments of LED driver circuits and the associated methods are disclosed herein. In one embodiment, the LED driver circuit comprises a switch-mode converter, a controller, a feedback circuit, and a gating circuit. The feedback circuit includes a current balance circuit. The gating circuit is responsive to both a current feedback signal and a voltage feedback signal and is configured to select one of them as the feedback signal.

摘要翻译： LED驱动器电路和相关方法的实施例在此公开。 在一个实施例中，LED驱动器电路包括开关模式转换器，控制器，反馈电路和门控电路。 反馈电路包括电流平衡电路。 门控电路响应于电流反馈信号和电压反馈信号，并且被配置为选择它们中的一个作为反馈信号。

公开(公告)号：US08645753B2

公开(公告)日：2014-02-04

申请号：US13335643

申请日：2011-12-22

申请人： Eric Yang ,  ZhengXing Li ,  Yuancheng Ren

发明人： Eric Yang ,  ZhengXing Li ,  Yuancheng Ren

IPC分类号： G06F11/00

CPC分类号： H02M3/156 ,  H02H9/001

摘要： The present disclosure discloses a power system with hot-swap with a buck converter. The power system comprises a front stage, a hot-swap stage and a load stage; wherein the hot-swap stage comprises: a buck converter having a switch operate at ON/OFF state to provide a desired output voltage to the load stage with low power loss and optimized thermal design.

摘要翻译： 本公开公开了一种具有降压转换器的热插拔的电力系统。 电力系统包括前级，热插拔级和负载级; 其中所述热插拔级包括：降压转换器，其具有在ON / OFF状态下操作的开关，以便以低功率损耗和优化的热设计向所述负载级提供期望的输出电压。

公开(公告)号：US20120293141A1

公开(公告)日：2012-11-22

申请号：US13474545

申请日：2012-05-17

申请人： Bo Zhang ,  Yuancheng Ren ,  Junming Zhang ,  James C. Moyer ,  Eric Yang

发明人： Bo Zhang ,  Yuancheng Ren ,  Junming Zhang ,  James C. Moyer ,  Eric Yang

IPC分类号： G05F1/70

CPC分类号： H02M1/4233 ,  H02M1/083 ,  H02M2001/0054 ,  Y02B70/126 ,  Y02B70/1491

摘要： A bridgeless PFC (power factor correction) converter with improved efficiency is disclosed. The bridgeless PFC converter comprises: input terminals configured to receive an input AC power supply; an output terminal configured to provide power supply; a high frequency bridge arm comprising a first switch and a third switch coupled between the output terminal and a ground node; a low frequency bridge arm comprising a second switch and a fourth switch coupled between the output terminal and the ground node; an inductor coupled between the input AC power supply and the high frequency bridge arm; and a control circuit configured to control the switching of switches in the high frequency bridge arm and the low frequency bridge arm.

摘要翻译： 公开了一种提高效率的无桥PFC（功率因数校正）转换器。 所述无桥PFC转换器包括：被配置为接收输入AC电源的输入端; 输出端子，被配置为提供电源; 高频桥臂，包括耦合在输出端和接地节点之间的第一开关和第三开关; 低频桥臂，包括耦合在所述输出端子和所述接地节点之间的第二开关和第四开关; 耦合在输入交流电源和高频桥臂之间的电感器; 以及控制电路，被配置为控制高频桥臂和低频桥臂中的开关的切换。

公开(公告)号：US08164218B2

公开(公告)日：2012-04-24

申请号：US12505399

申请日：2009-07-17

申请人： Naixing Kuang ,  Lei Du ,  Junming Zhang ,  Yuancheng Ren

发明人： Naixing Kuang ,  Lei Du ,  Junming Zhang ,  Yuancheng Ren

IPC分类号： H02J1/10 ,  G05F1/577

CPC分类号： H02M3/158 ,  H02M2001/009 ,  Y10T307/414 ,  Y10T307/50

摘要： SIMO power converters and associated methods of control are disclosed herein. In one embodiment, a method of converting a signal input signal into multiple output signals includes supplying power to a plurality of output terminals based on a signal input signal, detecting a voltage at individual output terminals, determining an arithmetic relationship between the detected voltages of the output terminals, and adjusting the power supplied to the plurality of output terminals based at least in part on the determined arithmetic relationship between the detected voltages of the output terminals.

摘要翻译： 本文公开了SIMO功率转换器和相关联的控制方法。 在一个实施例中，将信号输入信号转换为多个输出信号的方法包括基于信号输入信号向多个输出端子供电，检测各个输出端子处的电压，确定检测到的电压的算术关系 输出端子，并且至少部分地基于所确定的输出端子的检测电压之间的算术关系来调整提供给多个输出端子的功率。

公开(公告)号：US20120001603A1

公开(公告)日：2012-01-05

申请号：US13175543

申请日：2011-07-01

申请人： Qian Ouyang ,  Yuancheng Ren

发明人： Qian Ouyang ,  Yuancheng Ren

IPC分类号： G05F1/10

CPC分类号： H02M3/1588 ,  H02M2001/0025 ,  Y02B70/1466

摘要： A voltage regulator with adaptive hysteretic control. The voltage regulator may include a top switch (e.g., MOSFET) configured to couple a power supply supplying an input voltage to a load. An adaptive hysteretic control circuit of the voltage regulator may turn on the top switch when the feedback voltage reaches the low threshold and turn off the top switch when the feedback voltage reaches the high threshold. The adaptive hysteretic control circuit may adjust the upper and lower threshold to make the voltage regulator working like a constant on time control circuit in steady state. When a step down transient happens, the top switch could be turned off when the output voltage reaches the upper threshold, and when a step up transient happens, the top switch could be turned on when the output voltage reaches the lower threshold, it makes the voltage regulator working like a hysteretic control circuit.

摘要翻译： 具有自适应迟滞控制的电压调节器。 电压调节器可以包括被配置为将提供输入电压的电源耦合到负载的顶部开关（例如，MOSFET）。 当反馈电压达到低阈值时，电压调节器的自适应迟滞控制电路可以接通顶部开关，并且当反馈电压达到高阈值时关闭顶部开关。 自适应迟滞控制电路可以调节上限和下限阈值，使电压调节器工作在恒定的导通时间控制电路处于稳定状态。 当降压瞬变发生时，当输出电压达到上限阈值时，顶部开关可以关闭，当升压瞬变发生时，当输出电压达到下限阈值时，顶部开关可以导通， 电压调节器像滞后控制电路一样工作。

公开(公告)号：US20110285301A1

公开(公告)日：2011-11-24

申请号：US13110719

申请日：2011-05-18

申请人： Naixing Kuang ,  Lei Du ,  Junming Zhang ,  Yuancheng Ren

发明人： Naixing Kuang ,  Lei Du ,  Junming Zhang ,  Yuancheng Ren

IPC分类号： H05B37/02

CPC分类号： H05B33/0809 ,  H05B33/0845

摘要： Triac dimmer compatible switching mode power supplies used as LED drivers are disclosed herein. A PFC controller is configured in the switching mode power supplies. With the PFC controller, the current keeping the triac in the on-state is supplied by the DC/DC converter, and the LC resonance is reduced.

摘要翻译： 本文公开了用作LED驱动器的Triac调光器兼容的开关模式电源。 在开关模式电源中配置了PFC控制器。 使用PFC控制器，保持三端双向可控硅开关电流的电流由DC / DC转换器提供，LC谐振减小。

公开(公告)号：US08063570B2

公开(公告)日：2011-11-22

申请号：US12166140

申请日：2008-07-01

申请人： Junming Zhang ,  Yuancheng Ren ,  Kaiwei Yao ,  Eric Yang

发明人： Junming Zhang ,  Yuancheng Ren ,  Kaiwei Yao ,  Eric Yang

IPC分类号： H05B37/02 ,  H05B41/36

CPC分类号： H05B41/2855

摘要： A CCFL inverter circuit integrates a feedback circuit and protection circuit together. For both in-phase and out-of-phase applications, sensed lamp voltages can be used for open lamp and short lamp detection and sensed currents can be used for open lamp detection. The driving circuit adjusts the open lamp frequency by using a duty cycle control signal so that the driving circuit can always achieve the desired lamp voltage gain.

摘要翻译： CCFL逆变电路将反馈电路和保护电路集成在一起。 对于同相和异相应用，感测的灯电压可用于开灯和短灯检测，并且感测电流可用于开灯检测。 驱动电路通过使用占空比控制信号来调节开路频率，使得驱动电路总能达到期望的灯电压增益。