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    Smart driving method for synchronous rectifier and its apparatus thereof
    1.
    发明授权
    Smart driving method for synchronous rectifier and its apparatus thereof 有权
    同步整流器的智能驱动方法及其装置

    公开(公告)号：US08102680B2

    公开(公告)日：2012-01-24

    申请号：US12429099

    申请日：2009-04-23

    申请人： Yuancheng Ren ,  Junming Zhang ,  Lei Miao ,  Zhaoqi Mao

    发明人： Yuancheng Ren ,  Junming Zhang ,  Lei Miao ,  Zhaoqi Mao

    IPC分类号： H02M3/335

    CPC分类号： H02M3/33592 ,  Y02B70/1475

    摘要： The present invention discloses a smart driving method for a secondary synchronous rectifier of an isolated converter and its apparatus thereof. The apparatus comprises: a main circuit having a secondary synchronous rectifier Q1; a differentiation filter circuit, filtering the drain-source voltage Vds of the secondary synchronous rectifier, comprising a capacitor and at least one resistor connected in series and outputting a filtered voltage Vf from either between said capacitor and said at least one resistor or between said at least one resistor; a smart driver, receiving Vf and Vds and putting out a driving signal to the gate of the secondary synchronous rectifier. The control approach is fulfilled by comparing Vds to a reference voltage Vthr2 and comparing the absolute value of Vf to another reference voltage Vthr3. When Vds Vthr3, Q1 is turned on. When Vds>Vthr1, Q1 is turned off, where Vthr1 is a predetermined reference voltage. The driving is reliable with an additional differentiation filter circuit to eliminate error trigger.

    摘要翻译： 本发明公开了一种用于隔离变换器的次级同步整流器的智能驱动方法及其装置。 该装置包括：具有次级同步整流器Q1的主电路; 微分滤波器电路，对次级同步整流器的漏源电压Vds进行滤波，包括电容器和串联连接的至少一个电阻器，并从所述电容器和所述至少一个电阻器之间或在所述至少一个电阻器之间输出滤波电压Vf 最少一个电阻; 智能驱动器，接收Vf和Vds，并向第二同步整流器的门输出驱动信号。 通过将Vds与参考电压Vthr2进行比较并将Vf的绝对值与另一参考电压Vthr3进行比较来实现控制方法。 当Vds Vthr3时，Q1导通。 当Vds> Vthr1时，Q1截止，其中Vthr1是预定的参考电压。 驱动是可靠的，附加的微分滤波电路可以消除错误触发。

    SMART DRIVING METHOD FOR SYNCHRONOUS RECTIFIER AND ITS APPARATUS THEREOF
    2.
    发明申请
    SMART DRIVING METHOD FOR SYNCHRONOUS RECTIFIER AND ITS APPARATUS THEREOF 有权
    同步整流器的智能驱动方法及其设备

    公开(公告)号：US20090273951A1

    公开(公告)日：2009-11-05

    申请号：US12429099

    申请日：2009-04-23

    申请人： Yuancheng Ren ,  Junming Zhang ,  Lei Miao ,  Zhaoqi Mao

    发明人： Yuancheng Ren ,  Junming Zhang ,  Lei Miao ,  Zhaoqi Mao

    IPC分类号： H02M3/335

    CPC分类号： H02M3/33592 ,  Y02B70/1475

    摘要： The present invention discloses a smart driving method for a secondary synchronous rectifier of an isolated converter and its apparatus thereof. The apparatus comprises: a main circuit having a secondary synchronous rectifier Q1; a differentiation filter circuit, filtering the drain-source voltage Vds of the secondary synchronous rectifier, comprising a capacitor and at least one resistor connected in series and outputting a filtered voltage Vf from either between said capacitor and said at least one resistor or between said at least one resistor; a smart driver, receiving Vf and Vds and putting out a driving signal to the gate of the secondary synchronous rectifier. The control approach is fulfilled by comparing Vds to a reference voltage Vthr2 and comparing the absolute value of Vf to another reference voltage Vthr3. When Vds Vthr3, Q1 is turned on. When Vds>Vthr1, Q1 is turned off, where Vthr1 is a predetermined reference voltage. The driving is reliable with an additional differentiation filter circuit to eliminate error trigger.

    摘要翻译： 本发明公开了一种用于隔离变换器的次级同步整流器的智能驱动方法及其装置。 该装置包括：具有次级同步整流器Q1的主电路; 微分滤波器电路，对次级同步整流器的漏源电压Vds进行滤波，包括电容器和串联连接的至少一个电阻器，并从所述电容器和所述至少一个电阻器之间或在所述至少一个电阻器之间输出滤波电压Vf 最少一个电阻; 智能驱动器，接收Vf和Vds，并向第二同步整流器的门输出驱动信号。 通过将Vds与参考电压Vthr2进行比较并将Vf的绝对值与另一参考电压Vthr3进行比较来实现控制方法。 当Vds Vthr3时，Q1导通。 当Vds> Vthr1时，Q1截止，其中Vthr1是预定的参考电压。 驱动是可靠的，附加的微分滤波电路可以消除错误触发。

    Power systems for driving light emitting diodes and associated methods of control
    8.
    发明授权
    Power systems for driving light emitting diodes and associated methods of control 有权
    用于驱动发光二极管的电力系统和相关联的控制方法

    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。

    BRIDGELESS PFC CONVERTER AND THE METHOD THEREOF
    9.
    发明申请
    BRIDGELESS PFC CONVERTER AND THE METHOD THEREOF 审中-公开
    无桥PFC转换器及其方法

    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。

    Power converters and associated methods of control
    10.
    发明授权
    Power converters and associated methods of control 有权
    电源转换器和相关的控制方法

    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。