公开(公告)号：US20120300520A1

公开(公告)日：2012-11-29

申请号：US13478575

申请日：2012-05-23

申请人： Yuancheng Ren ,  Lei Miao

发明人： Yuancheng Ren ,  Lei Miao

IPC分类号： H02M7/217

CPC分类号： H02M3/33592 ,  H02M1/32 ,  Y02B70/1475

摘要： A switching mode power supply comprising a synchronous rectifying control circuit. The synchronous rectifying control circuit comprising an integrating circuit, a first comparison circuit and a logic circuit. The integrating circuit is configured to provide an integrating signal. The first comparison circuit comprises a first input coupled to the output of the integrating signal, a second input configured to receive a first threshold signal, and an output. The logic circuit comprises a first input coupled to the output of the first comparison circuit and an output coupled to a control terminal of the secondary switch, and the secondary switch is configured to be turned OFF when the integrating signal is less then the first threshold signal.

摘要翻译： 一种开关模式电源，包括同步整流控制电路。 该同步整流控制电路包括积分电路，第一比较电路和逻辑电路。 积分电路被配置为提供积分信号。 第一比较电路包括耦合到积分信号的输出的第一输入，被配置为接收第一阈值信号的第二输入和输出。 逻辑电路包括耦合到第一比较电路的输出的第一输入和耦合到次级开关的控制端的输出，并且次级开关被配置为当积分信号小于第一阈值信号时被断开 。

公开(公告)号：US08098018B2

公开(公告)日：2012-01-17

申请号：US12613286

申请日：2009-11-05

申请人： Bairen Liu ,  Lei Du ,  Yuancheng Ren

发明人： Bairen Liu ,  Lei Du ,  Yuancheng Ren

IPC分类号： H05B41/16

CPC分类号： H05B41/282 ,  Y02B20/183

摘要： The present invention provides a pulse dimming circuit and a method thereof. The pulse dimming circuit is compatible for both DC input signal and PWM input signal using only one circuit board, and includes a first input port, a second input port, a comparison signal generator, a comparator, a logic module, and a switch network electrically coupled to the second input port, an output terminal of the comparator, and an output terminal of the logic module.

摘要翻译： 本发明提供一种脉冲调光电路及其方法。 脉冲调光电路仅使用一个电路板与直流输入信号和PWM输入信号兼容，并且包括第一输入端口，第二输入端口，比较信号发生器，比较器，逻辑模块和电气交换网络 耦合到第二输入端口，比较器的输出端子和逻辑模块的输出端子。

公开(公告)号：US20100259180A1

公开(公告)日：2010-10-14

申请号：US12755341

申请日：2010-04-06

申请人： Yuancheng Ren ,  Lei Du ,  Yong Huang

发明人： Yuancheng Ren ,  Lei Du ,  Yong Huang

IPC分类号： H05B37/02

CPC分类号： H05B33/0818

摘要： An LED circuit is disclosed. The circuit senses the average current flowing through the LED. The sensed signal is compensated and modulated. The modulated signal is then used to control the ON/OFF state of a switch that supplies power to the LED.

摘要翻译： 公开了一种LED电路。 该电路感测流过LED的平均电流。 感测的信号被补偿和调制。 然后调制信号用于控制向LED供电的开关的ON / OFF状态。

公开(公告)号：US20050184713A1

公开(公告)日：2005-08-25

申请号：US11018920

申请日：2004-12-22

申请人： Ming Xu ,  Jinghai Zhou ,  Yuancheng Ren ,  Fred Lee ,  Jia Wei

发明人： Ming Xu ,  Jinghai Zhou ,  Yuancheng Ren ,  Fred Lee ,  Jia Wei

IPC分类号： G05F1/40 ,  H02M3/156

CPC分类号： H02M3/156 ,  H02M2001/0019 ,  H02M2001/0032 ,  H02M2001/007 ,  Y02B70/16

摘要： A two-stage power converter that dynamically adjusts to output current requirements includes a first stage regulator that provides power to a second stage regulator. The first stage can be a buck converter, and the second stage can be a multiple-phase buck converter. The output voltage of the first stage (intermediate bus voltage Vbus) is varied according to the load current to optimize conversion efficiency. To provide maximum efficiency, the Vbus voltage is increased as load current increases. The Vbus voltage provided by the first stage can be varied by duty cycle or operating frequency control. In another embodiment, the switching frequency of the second stage is varied as output current changes so that output current ripple is held constant. In an embodiment employing a multiple-phase buck converter in the second stage, the number of operating phases are varied as output current changes.

摘要翻译： 动态调节输出电流要求的两级功率转换器包括为第二级调节器提供电源的第一级稳压器。 第一级可以是降压转换器，第二级可以是多相降压转换器。 第一级（中间总线电压Vbus）的输出电压根据负载电流而变化，以优化转换效率。 为了提供最大的效率，Vbus电压随着负载电流的增加而增加。 第一级提供的Vbus电压可以通过占空比或工作频率控制来改变。 在另一个实施例中，当输出电流改变时，第二级的开关频率变化，使得输出电流纹波保持恒定。 在采用第二级中的多相降压转换器的实施例中，随着输出电流的变化，工作阶段的数量变化。

公开(公告)号：US06819574B2

公开(公告)日：2004-11-16

申请号：US10350330

申请日：2003-01-24

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

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

IPC分类号： H02M3335

CPC分类号： H02M3/33592 ,  Y02B70/1475

摘要： A power converter having a primary circuit (e.g. full bridge) and a secondary circuit (e.g. current doubler) has switches in the secondary circuit that are controlled by a drive circuit. The drive circuit is connected to a swing node in the primary circuit, and is powered by the swing node. The drive circuit has an isolation device such as a transformer to provide electrical isolation between the primary circuit and secondary circuit. The drive circuit provides a current source for driving the secondary switch gates, thereby reducing power consumption. The present drive circuit provides clean gate drive signals without noise and oscillations. The drive circuits of the invention are simple, and require only a few components.

公开(公告)号：US09608532B2

公开(公告)日：2017-03-28

申请号：US14678932

申请日：2015-04-04

申请人： Pitleong Wong ,  Yuancheng Ren ,  Xunwei Zhou

发明人： Pitleong Wong ,  Yuancheng Ren ,  Xunwei Zhou

IPC分类号： H02M3/335 ,  H02M1/38 ,  H02M1/00 ,  H02M3/158

CPC分类号： H02M3/33592 ,  H02M1/38 ,  H02M3/1588 ,  H02M2001/0009 ,  H02M2001/0058 ,  Y02B70/126 ,  Y02B70/1466 ,  Y02B70/1475 ,  Y02B70/1491

摘要： To maximize power efficiency, dead time between “on” times of a synchronous rectifier (“SR”) MOSFET switch and a main switch for CCM operation in particular in isolated and non-isolated self-driven synchronous DC-DC converters needs to be optimized. To accomplish that objective, the latest conduction time t of a body diode of the SR MOSFET following conduction thereof is determined, compared with a selected fixed optimum period T1, and incrementally or decrementally adjusted in a subsequent switching cycle while t is unequal to T1, depending on whether t is shorter or longer than T1, so that t eventually is made substantially equal to T1 in length. This process is to be repeated continuously.

公开(公告)号：US08604710B2

公开(公告)日：2013-12-10

申请号：US13224893

申请日：2011-09-02

申请人： Bo Yu ,  Yuancheng Ren ,  Lei Du ,  Naixing Kuang ,  Zhijiang Yang

发明人： Bo Yu ,  Yuancheng Ren ,  Lei Du ,  Naixing Kuang ,  Zhijiang Yang

IPC分类号： H05B37/02

CPC分类号： H05B33/0845 ,  H05B33/0815 ,  H05B41/3927 ,  Y02B20/346

摘要： The present disclosure discloses a multi-mode dimming circuit configurable to operate in a first dimming mode, a second dimming mode and a third dimming mode. The present disclosure also discloses separate dimming circuits for respectively realize the three dimming modes. In one embodiment the multi-mode dimming circuit may comprise a first input terminal, a second input terminal, a third input terminal, an output terminal, a resistive device, an oscillation circuit and a pulse width modulation (PWM) circuit. Users may flexibly configure the multi-mode dimming circuit to operate in one of the three different dimming modes by varying the external devices and/or signals coupled to each of the first, second and third input terminals.

摘要翻译： 本公开公开了一种多模式调光电路，其可配置为在第一调光模式，第二调光模式和第三调光模式中操作。 本公开还公开了用于分别实现三个调光模式的单独的调光电路。 在一个实施例中，多模式调光电路可以包括第一输入端，第二输入端，第三输入端，输出端，电阻器件，振荡电路和脉冲宽度调制（PWM）电路。 用户可以通过改变耦合到第一，第二和第三输入端子中的每一个的外部设备和/或信号来灵活地将多模式调光电路配置为以三种不同的调光模式之一工作。

公开(公告)号：US20120056552A1

公开(公告)日：2012-03-08

申请号：US13224893

申请日：2011-09-02

申请人： Bo Yu ,  Yuancheng Ren ,  Lei Du ,  Naixing Kuang ,  Zhijiang Yang

发明人： Bo Yu ,  Yuancheng Ren ,  Lei Du ,  Naixing Kuang ,  Zhijiang Yang

IPC分类号： H05B37/02

CPC分类号： H05B33/0845 ,  H05B33/0815 ,  H05B41/3927 ,  Y02B20/346

摘要： The present disclosure discloses a multi-mode dimming circuit configurable to operate in a first dimming mode, a second dimming mode and a third dimming mode. The present disclosure also discloses separate dimming circuits for respectively realize the three dimming modes. In one embodiment the multi-mode dimming circuit may comprise a first input terminal, a second input terminal, a third input terminal, an output terminal, a resistive device, an oscillation circuit and a pulse width modulation (PWM) circuit. Users may flexibly configure the multi-mode dimming circuit to operate in one of the three different dimming modes by varying the external devices and/or signals coupled to each of the first, second and third input terminals.

摘要翻译： 本公开公开了一种多模式调光电路，其可配置为在第一调光模式，第二调光模式和第三调光模式中操作。 本公开还公开了用于分别实现三个调光模式的单独的调光电路。 在一个实施例中，多模式调光电路可以包括第一输入端，第二输入端，第三输入端，输出端，电阻器件，振荡电路和脉冲宽度调制（PWM）电路。 用户可以通过改变耦合到第一，第二和第三输入端子中的每一个的外部设备和/或信号来灵活地将多模式调光电路配置为以三种不同的调光模式之一工作。

公开(公告)号：US20110234122A1

公开(公告)日：2011-09-29

申请号：US13069283

申请日：2011-03-22

申请人： Bo Yu ,  Yuancheng Ren ,  Lei Du ,  Naixing Kuang ,  Zhishun Li

发明人： Bo Yu ,  Yuancheng Ren ,  Lei Du ,  Naixing Kuang ,  Zhishun Li

IPC分类号： H05B37/02

CPC分类号： H05B33/0827 ,  G09G3/3406

摘要： Circuitry and methods for driving a plurality of LED strings are disclosed herein. In one embodiment, the circuitry comprises a plurality of current regulating circuits electrically coupled to the LED strings and are configured to regulate a current flowing through the LED strings. At least two control circuits are coupled to the current regulating circuits and are configured to generate a control signal according to terminal voltages of the corresponding current regulating circuits. A voltage converter is electrically coupled to the LED strings and to the at least two control circuits, and is configured to regulate the DC driving voltage according to the at least two control signals.

摘要翻译： 本文公开了用于驱动多个LED串的电路和方法。 在一个实施例中，电路包括电耦合到LED串的多个电流调节电路，并且被配置为调节流过LED串的电流。 至少两个控制电路耦合到电流调节电路，并且被配置为根据相应的电流调节电路的端子电压产生控制信号。 电压转换器电耦合到LED串和至少两个控制电路，并且被配置为根据至少两个控制信号来调节DC驱动电压。

公开(公告)号：US07719206B2

公开(公告)日：2010-05-18

申请号：US12145350

申请日：2008-06-24

申请人： Yuancheng Ren ,  Kaiwei Yao ,  Wei Chen

发明人： Yuancheng Ren ,  Kaiwei Yao ,  Wei Chen

IPC分类号： H05B37/02

CPC分类号： H05B41/2855 ,  H05B37/03 ,  H05B37/034

摘要： A detector circuit monitors the phase relationship between the lamp voltage and the excitation voltage, and if one or more conditions are met, triggers the open lamp protection process in a discharge lamp system. The detection circuit can be incorporated into a lamp voltage feedback circuit and implemented on the integrated circuit level with less cost and circuit complexity.

摘要翻译： 检测器电路监视灯电压和激励电压之间的相位关系，并且如果满足一个或多个条件，则触发放电灯系统中的开路灯保护处理。 检测电路可以并入到灯电压反馈电路中，并且以较低的成本和电路复杂度在集成电路级上实现。