公开(公告)号：US08648630B2

公开(公告)日：2014-02-11

申请号：US13297085

申请日：2011-11-15

申请人： Jiqing Yang ,  Meng Li ,  Qiang Luo ,  Lieyi Fang

发明人： Jiqing Yang ,  Meng Li ,  Qiang Luo ,  Lieyi Fang

IPC分类号： H03B1/00 ,  H03K3/00

CPC分类号： H03K17/302 ,  H03K17/063 ,  H03K2217/0081

摘要： System and method are provided for driving a transistor. The system includes a floating-voltage generator, a first driving circuit, and a second driving circuit. The floating-voltage generator is configured to receive a first bias voltage and generate a floating voltage, the floating-voltage generator being further configured to change the floating voltage if the first bias voltage changes and to maintain the floating voltage to be lower than the first bias voltage by a first predetermined value in magnitude. The first driving circuit is configured to receive an input signal, the first bias voltage and the floating voltage. The second driving circuit is configured to receive the input signal, a second bias voltage and a third bias voltage, the first driving circuit and the second driving circuit being configured to generate an output signal to drive a transistor.

摘要翻译： 提供了用于驱动晶体管的系统和方法。 该系统包括浮置电压发生器，第一驱动电路和第二驱动电路。 浮置电压发生器被配置为接收第一偏置电压并产生浮置电压，该浮动电压发生器进一步被配置为如果第一偏置电压改变则改变浮动电压，并且将浮置电压保持为低于第一偏置电压 偏置电压大小为第一预定值。 第一驱动电路被配置为接收输入信号，第一偏置电压和浮置电压。 第二驱动电路被配置为接收输入信号，第二偏置电压和第三偏置电压，第一驱动电路和第二驱动电路被配置为产生驱动晶体管的输出信号。

公开(公告)号：US08559152B2

公开(公告)日：2013-10-15

申请号：US13005427

申请日：2011-01-12

申请人： Yaming Cao ,  Jinya Dong ,  Yunchao Zhang ,  Lieyi Fang

发明人： Yaming Cao ,  Jinya Dong ,  Yunchao Zhang ,  Lieyi Fang

IPC分类号： H02H5/04

CPC分类号： H02M1/32 ,  H02H3/006 ,  H02M3/33507

摘要： System and method for protecting a power converter. The system includes a duty-cycle detection component configured to receive a modulation signal, determine a first duty cycle corresponding to a first period of the modulation signal, compare the first duty cycle with a threshold duty cycle, and generate a duty-cycle comparison signal. Additionally, the system includes a threshold generator configured to receive the duty-cycle comparison signal and generate a threshold signal corresponding to a second period of the modulation signal, the second period being after the first period, and a comparator configured to receive the threshold signal and a first signal and to generate a first comparison signal. The first signal is associated with an input current for a power converter. Moreover, the system includes a pulse-width-modulation component configured to receive the first comparison signal and generate the modulation signal for adjusting the input current for the power converter.

摘要翻译： 保护电源转换器的系统和方法。 该系统包括：占空比检测部件，被配置为接收调制信号，确定与调制信号的第一周期对应的第一占空比，将第一占空比与阈值占空比进行比较，并产生占空比比较信号 。 另外，该系统包括阈值发生器，其被配置为接收占空比比较信号并产生对应于调制信号的第二周期的阈值信号，第二周期在第一周期之后，以及比较器，被配置为接收阈值信号 和第一信号并产生第一比较信号。 第一个信号与功率转换器的输入电流相关联。 此外，该系统包括脉冲宽度调制分量，其被配置为接收第一比较信号并产生用于调整功率转换器的输入电流的调制信号。

公开(公告)号：US20130258723A1

公开(公告)日：2013-10-03

申请号：US13465899

申请日：2012-05-07

申请人： Lieyi FANG ,  Zhiqiang SUN

发明人： Lieyi FANG ,  Zhiqiang SUN

IPC分类号： H02M3/335

CPC分类号： H02M3/33523 ,  H02M3/33507 ,  H02M3/33515 ,  H02M2001/0003

摘要： System and method for regulating a power conversion system. A system controller for regulating a power conversion system includes a first controller terminal, a second controller terminal and a third controller terminal. The system controller is configured to receive an input signal at the first controller terminal and turn on or off a switch based on at least information associated with the input signal to adjust a primary current flowing through a primary winding of the power conversion system, receive a first signal at the second controller terminal from the switch, and charge a capacitor through the third controller terminal in response to the first signal.

摘要翻译： 用于调节电力转换系统的系统和方法。 用于调节功率转换系统的系统控制器包括第一控制器端子，第二控制器端子和第三控制器端子。 系统控制器被配置为在第一控制器终端处接收输入信号，并且基于至少与输入信号相关联的信息来接通或关闭开关，以调节流过电力转换系统的初级绕组的初级电流，接收 在第二控制器端从信号开关发出第一信号，并响应于第一信号通过第三控制器端对电容器充电。

公开(公告)号：US08526203B2

公开(公告)日：2013-09-03

申请号：US12581775

申请日：2009-10-19

申请人： Xiaomin Huang ,  Yaming Cao ,  Xiuhong Zhang ,  Lieyi Fang

发明人： Xiaomin Huang ,  Yaming Cao ,  Xiuhong Zhang ,  Lieyi Fang

IPC分类号： H02M3/335

CPC分类号： H02M3/33523

摘要： System and method for regulating a power converter. The system includes a first signal generator configured to receive at least an input signal and generate at least a first output signal associated with demagnetization and a second output signal associated with sampling. Additionally, the system includes a sampling component configured to receive at least the input signal and the second output signal, sample the input signal based on at least information associated with the second output signal, and generate at least a third output signal associated with one or more sampled magnitudes. Moreover, the system includes an error amplifier configured to receive at least the third output signal and a first threshold voltage and generate at least a fourth output signal with a capacitor, the capacitor being coupled to the error amplifier.

摘要翻译： 用于调节功率转换器的系统和方法。 该系统包括第一信号发生器，其被配置为接收至少一个输入信号并且产生与去磁有关的至少第一输出信号和与取样相关联的第二输出信号。 另外，该系统包括被配置为至少接收输入信号和第二输出信号的采样分量，至少基于与第二输出信号相关联的信息对输入信号进行采样，并且产生与一个或多个输出信号相关联的至少第三输出信号 更多采样幅度。 此外，该系统包括误差放大器，该误差放大器被配置为接收至少第三输出信号和第一阈值电压并且用电容器产生至少第四输出信号，该电容器耦合到误差放大器。

公开(公告)号：US20130169325A1

公开(公告)日：2013-07-04

申请号：US13367088

申请日：2012-02-06

申请人： Yongsheng Su ,  Liqiang Zhu ,  Qiang Luo ,  Lieyi Fang

发明人： Yongsheng Su ,  Liqiang Zhu ,  Qiang Luo ,  Lieyi Fang

IPC分类号： H03L7/00

CPC分类号： H03L7/00 ,  H05B33/0815 ,  Y02B20/346

摘要： System and method for signal synchronization. The system includes a first selection component, a first signal generator, a second signal generator and a first gate drive component. The first selection component is configured to receive a first mode signal and generate a first selection signal based on at least information associated with the first mode signal. The first signal generator is configured to, if the first selection signal satisfies one or more first conditions, receive a first input signal and generate at least a first clock signal based on at least information associated with the first input signal. Furthermore, the first gate drive component is configured to, if the first selection signal satisfies the one or more first conditions, receive at least the first clock signal and output a first drive signal to a first switch.

摘要翻译： 用于信号同步的系统和方法 该系统包括第一选择部件，第一信号发生器，第二信号发生器和第一栅极驱动部件。 第一选择部件被配置为接收第一模式信号并且至少基于与第一模式信号相关联的信息产生第一选择信号。 第一信号发生器被配置为，如果第一选择信号满足一个或多个第一条件，则至少基于与第一输入信号相关联的信息，接收第一输入信号并产生至少第一时钟信号。 此外，第一栅极驱动部件被配置为，如果第一选择信号满足一个或多个第一条件，则至少接收第一时钟信号并将第一驱动信号输出到第一开关。

公开(公告)号：US20130147379A1

公开(公告)日：2013-06-13

申请号：US13344880

申请日：2012-01-06

申请人： Jun Zhou ,  Yunchao Zhang ,  Lieyi Fang

发明人： Jun Zhou ,  Yunchao Zhang ,  Lieyi Fang

IPC分类号： H05B37/02

CPC分类号： H05B33/0815 ,  H05B33/0803 ,  H05B33/0806 ,  H05B33/0842 ,  H05B33/0848 ,  H05B33/0866 ,  H05B33/089 ,  Y02B20/346

摘要： System and method for regulating one or more currents. The system includes a system controller, an inductor, a first resistor, a switch and a first diode. The system controller includes a first controller terminal and a ground terminal, the system controller being configured to output a drive signal at the first controller terminal. The inductor includes a first inductor terminal and a second inductor terminal, the first inductor terminal being coupled to the ground terminal, the second inductor terminal being coupled to one or more light emitting diodes. The first resistor includes a first resistor terminal and a second resistor terminal, the first resistor terminal being coupled to the ground terminal. The switch is configured to receive the drive signal and coupled to the second resistor terminal. The first diode includes a first diode terminal and a second diode terminal and coupled to the first resistor.

摘要翻译： 用于调节一个或多个电流的系统和方法。 该系统包括系统控制器，电感器，第一电阻器，开关和第一二极管。 所述系统控制器包括第一控制器端子和接地端子，所述系统控制器被配置为在所述第一控制器端子处输出驱动信号。 电感器包括第一电感器端子和第二电感器端子，第一电感器端子耦合到接地端子，第二电感器端子耦合到一个或多个发光二极管。 第一电阻器包括第一电阻器端子和第二电阻器端子，第一电阻器端子耦合到接地端子。 开关被配置为接收驱动信号并耦合到第二电阻器端子。 第一二极管包括第一二极管端子和第二二极管端子，并耦合到第一电阻器。

公开(公告)号：US20130033105A1

公开(公告)日：2013-02-07

申请号：US13215000

申请日：2011-08-22

申请人： Jiqing Yang ,  Meng Li ,  Liqiang Zhu ,  Lieyi Fang

发明人： Jiqing Yang ,  Meng Li ,  Liqiang Zhu ,  Lieyi Fang

IPC分类号： H02J4/00

CPC分类号： H05B33/0812 ,  G09G3/32 ,  H05B33/0815 ,  H05B33/0827 ,  H05B33/0842 ,  H05B37/02 ,  Y10T307/406

摘要： System and method are provided for generating a plurality of channel currents. The system includes a channel reference generator configured to receive a first reference current and generate at least a first channel driving current and a second channel driving current, a first channel current divider configured to receive the first channel driving current and generate a first input current, a second input current, and a third input current, a second channel current divider configured to receive the second channel driving current and generate a fourth input current, a fifth input current, and a sixth input current, a first channel driver configured to receive the first input current, the second input current, and the third input current and generate a first channel current, and a second channel driver configured to receive the fourth input current, the fifth input current, and the sixth input current and generate a second channel current.

公开(公告)号：US08339814B2

公开(公告)日：2012-12-25

申请号：US12893474

申请日：2010-09-29

申请人： Xiuhong Zhang ,  Zhen Zhu ,  Yaming Cao ,  Lieyi Fang

发明人： Xiuhong Zhang ,  Zhen Zhu ,  Yaming Cao ,  Lieyi Fang

IPC分类号： H02M3/335

CPC分类号： H02M3/33507 ,  H02M2001/0032 ,  Y02B70/16

摘要： Method and system for efficient power control with multiple modes. According to an embodiment, the present invention provides a power system with selectable power modes. The power system includes a first terminal for outputting energy, and the first terminal is electrically coupled to a load. The system also includes a pulse-frequency modulation (PFM) component that is configured to adjust a pulse frequency based on the load. The system additionally includes a pulse-width modulation (PWM) component that is configured to adjust a pulse width based on the load. The system further includes a switch that is electrically coupled to the first terminal. Also, the system includes a control component, the control component being configured to provide a control signal that is capable of causing the switch to be turned on or off. The control signal is associated with an output of the PWM component and the pulse width if an output is greater than a predetermined value. The control signal is associated with an output of the PFM component and the pulse frequency if an output is lower than a predetermined value.

摘要翻译： 多种模式的高效功率控制方法和系统。 根据实施例，本发明提供了一种具有可选功率模式的电力系统。 电力系统包括用于输出能量的第一端子，并且第一端子电耦合到负载。 该系统还包括脉冲频率调制（PFM）组件，其被配置为基于负载来调节脉冲频率。 该系统还包括脉冲宽度调制（PWM）组件，其被配置为基于负载调整脉冲宽度。 该系统还包括电耦合到第一端子的开关。 此外，该系统包括控制部件，该控制部件被配置为提供能够使开关导通或断开的控制信号。 如果输出大于预定值，则控制信号与PWM分量的输出和脉冲宽度相关联。 如果输出低于预定值，则控制信号与PFM分量的输出和脉冲频率相关联。

公开(公告)号：US20120319742A1

公开(公告)日：2012-12-20

申请号：US13213931

申请日：2011-08-19

申请人： Xiangkun Zhai ,  Yuan Lin ,  Xiaomin Huang ,  Lieyi Fang

发明人： Xiangkun Zhai ,  Yuan Lin ,  Xiaomin Huang ,  Lieyi Fang

IPC分类号： H03K17/06

CPC分类号： H02M3/33507 ,  H03K17/0414 ,  H03K17/0422 ,  H03K17/063

摘要： System and method for driving a bipolar junction transistor for a power converter. The system includes a current generator configured to output a drive current signal to a bipolar junction transistor to adjust a primary current flowing through a primary winding of a power converter. The current generator is further configured to output the drive current signal to turn on the bipolar junction transistor during a first time period, a second time period, and a third time period, the second time period separating the first time period from the third time period, drive the bipolar junction transistor to operate in a hard-saturation region during the first time period and the second time period, and drive the bipolar junction transistor to operate in a quasi-saturation region during the third time period.

摘要翻译： 用于驱动功率转换器的双极结型晶体管的系统和方法。 该系统包括电流发生器，其被配置为将驱动电流信号输出到双极结型晶体管，以调节流过功率转换器的初级绕组的初级电流。 电流发生器还被配置为输出驱动电流信号以在第一时间段，第二时间段和第三时间段内导通双极结晶体管，第二时间段将第一时间段与第三时间段 在第一时间段和第二时间段期间驱动双极结晶体管在硬饱和区域中工作，并且在第三时间段期间驱动双极结晶体管在准饱和区域中工作。

公开(公告)号：US08106641B2

公开(公告)日：2012-01-31

申请号：US11692098

申请日：2007-03-27

申请人： Yuan Lin ,  Jun Ye ,  Lieyi Fang

发明人： Yuan Lin ,  Jun Ye ,  Lieyi Fang

IPC分类号： G05F1/46

CPC分类号： H02M1/32 ,  H02M2001/0032 ,  Y02B70/16 ,  Y10S323/901

摘要： System and method for providing stable control for power systems. According to an embodiment, the present invention provides an apparatus for providing one or more control signals for a power system. The apparatus includes an input terminal for receiving an electrical energy, which can be characterized by a first input voltage. The apparatus includes a control component that is configured to generate a first control signal based on at least information associated with the first input voltage. The apparatus additionally includes an output terminal for sending the first control signal. Moreover, the apparatus includes a timing component that is coupled to the control component. The control component is configured to process at least information associated with a first value of the first input voltage at a first time and a first reference voltage and to generate a second control signal.

摘要翻译： 为电力系统提供稳定控制的系统和方法。 根据实施例，本发明提供了一种用于为电力系统提供一个或多个控制信号的装置。 该装置包括用于接收电能的输入端子，其可以由第一输入电压表征。 该装置包括控制部件，其被配置为基于至少基于与第一输入电压相关联的信息生成第一控制信号。 该装置还包括用于发送第一控制信号的输出端子。 此外，该装置包括耦合到控制部件的定时部件。 控制部件被配置为至少处理与第一输入电压的第一值相关联的信息和第一参考电压并产生第二控制信号。