公开(公告)号：US09379623B2

公开(公告)日：2016-06-28

申请号：US13052869

申请日：2011-03-21

申请人： Yunchao Zhang ,  Jinya Dong ,  Xiuhong Zhang ,  Lieyi Fang

发明人： Yunchao Zhang ,  Jinya Dong ,  Xiuhong Zhang ,  Lieyi Fang

IPC分类号： H02M3/335 ,  H02M1/00

CPC分类号： H02M3/33523 ,  H02M1/08 ,  H02M3/335 ,  H02M3/33592 ,  H02M2001/0003

摘要： System and method for adjusting a threshold of a power conversion system. The system includes a threshold generator configured to receive a first signal and generate a threshold signal based on at least information associated with the first signal, a comparator configured to receive the threshold signal and a second signal and generate a comparison signal, and a gate driver configured to generate a drive signal based on at least information associated with the comparison signal. The gate driver is coupled to at least a switch configured to receive the drive signal and affect a current flowing through a primary winding coupled to a secondary winding. If the second signal is larger than the threshold signal in magnitude, the drive signal causes the switch to open. The drive signal is associated with a switching frequency.

摘要翻译： 用于调整功率转换系统的阈值的系统和方法。 该系统包括阈值发生器，其被配置为基于至少与第一信号相关联的信息来接收第一信号并产生阈值信号，配置成接收阈值信号和第二信号并产生比较信号的比较器以及门驱动器 被配置为基于至少与所述比较信号相关联的信息来产生驱动信号。 栅极驱动器耦合到至少一个被配置为接收驱动信号并且影响流过耦合到次级绕组的初级绕组的电流的开关。 如果第二信号的幅度大于阈值信号，则驱动信号使开关断开。 驱动信号与开关频率相关联。

公开(公告)号：US20130057331A1

公开(公告)日：2013-03-07

申请号：US13273061

申请日：2011-10-13

申请人： Tingzhi Yuan ,  Yunchao Zhang ,  Zhiqiang Sun ,  Lieyi Fang

发明人： Tingzhi Yuan ,  Yunchao Zhang ,  Zhiqiang Sun ,  Lieyi Fang

IPC分类号： G06G7/186

CPC分类号： H03F1/3205 ,  H03F3/183 ,  H03F2200/03 ,  H03F2201/3215 ,  H04R3/04 ,  H04R2430/01

摘要： System and method for integrating an input signal to generate an output signal. The system includes a first integrator configured to receive the input signal and generate an integrated signal based on at least information associated with the input signal, a second integrator configured to receive the integrated signal and generate the output signal based on at least information associated with the integrated signal, and a compensation capacitor coupled to the first integrator and the second integrator. The first integrator includes a first integration capacitor and a first operational amplifier including a first input terminal and a first output terminal, the first integration capacitor being coupled between the first input terminal and the first output terminal. The second integrator includes a second integration capacitor and a second operational amplifier including a second input terminal and a second output terminal.

公开(公告)号：US20130057238A1

公开(公告)日：2013-03-07

申请号：US13273067

申请日：2011-10-13

申请人： Lieyi Fang ,  Yunchao Zhang ,  Tingzhi Yuan

发明人： Lieyi Fang ,  Yunchao Zhang ,  Tingzhi Yuan

IPC分类号： G05F1/625

CPC分类号： H03F21/00 ,  H03K7/08

摘要： System and method for amplifying an input signal to generate an output signal. The system includes a current generator, an oscillator, and a comparator. The current generator is configured to receive a first voltage signal, and generate a first current signal based on at least information associated with the first voltage signal and the first reference signal. The oscillator is configured to receive at least the first current signal and a second reference signal, and to generate a second voltage signal based on at least information associated with the first current signal and the second reference signal, the second voltage signal being associated with a modulation frequency. Additionally, the comparator is configured to receive the second voltage signal and a third voltage signal, and to generate a modulation signal related to the modulation frequency based on at least information associated with the second voltage signal and the third voltage signal.

摘要翻译： 用于放大输入信号以产生输出信号的系统和方法。 该系统包括电流发生器，振荡器和比较器。 电流发生器被配置为接收第一电压信号，并且至少基于与第一电压信号和第一参考信号相关联的信息产生第一电流信号。 所述振荡器被配置为至少接收所述第一电流信号和第二参考信号，并且至少基于与所述第一电流信号和所述第二参考信号相关联的信息产生第二电压信号，所述第二电压信号与 调制频率。 此外，比较器被配置为接收第二电压信号和第三电压信号，并且至少基于与第二电压信号和第三电压信号相关联的信息产生与调制频率相关的调制信号。

公开(公告)号：US20120075891A1

公开(公告)日：2012-03-29

申请号：US13071384

申请日：2011-03-24

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

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

IPC分类号： H02M3/335

CPC分类号： H02M3/33515 ,  H02M1/08 ,  H02M3/335 ,  H02M3/33523 ,  H02M2001/0009 ,  H05B33/0815

摘要： System and method for regulating a power converter. The system includes a first signal generator configured to receive a first sensed signal and generate an output signal associated with demagnetization. The first sensed signal is related to a first winding coupled to a secondary winding for a power converter, and the secondary winding is associated with at least an output current for the power converter. Additionally, the system includes a ramping signal generator configured to receive the output signal and generate a ramping signal, and a first comparator configured to receive the ramping signal and a first threshold signal and generate a first comparison signal based on at least information associated with the ramping signal and the first threshold signal. Moreover, the system includes a second comparator configured to receive a second sensed signal and a second threshold signal and generate a second comparison signal.

摘要翻译： 用于调节功率转换器的系统和方法。 该系统包括被配置为接收第一感测信号并产生与去磁相关联的输出信号的第一信号发生器。 第一感测信号与耦合到功率转换器的次级绕组的第一绕组有关，次级绕组至少与功率转换器的输出电流相关联。 另外，该系统包括斜坡信号发生器，其被配置为接收输出信号并产生斜坡信号，以及第一比较器，被配置为接收斜坡信号和第一阈值信号，并且至少基于至少与 斜坡信号和第一阈值信号。 此外，该系统包括被配置为接收第二感测信号和第二阈值信号并产生第二比较信号的第二比较器。

公开(公告)号：US09088217B2

公开(公告)日：2015-07-21

申请号：US12859138

申请日：2010-08-18

申请人： Yunchao Zhang ,  Lieyi Fang

发明人： Yunchao Zhang ,  Lieyi Fang

IPC分类号： H02M7/44 ,  H02M3/335 ,  H02M1/00

CPC分类号： H02M3/33507 ,  H02M2001/0019 ,  H02M2001/0032 ,  Y02B70/16

摘要： System and method for regulating an output voltage of a power conversion system. The system includes a sampling component located on a chip configured to receive an input voltage through a terminal. The sampling component is configured to sample the input voltage and generate a sampled voltage. Additionally, the system includes an error amplifier configured to process information associated with the sampled voltage and a threshold voltage and generate a first output signal, and a first signal generator configured to generate a second output signal and one or more third output signals. Moreover, the system includes a comparator configured to receive the first output signal and the second output signal and generate a comparison signal, and a gate driver directly or indirectly coupled to the comparator and configured to generate a drive signal based on at least information associated with the comparison signal.

摘要翻译： 用于调节电力转换系统的输出电压的系统和方法。 该系统包括位于芯片上的采样部件，配置成通过端子接收输入电压。 采样分量被配置为对输入电压进行采样并产生采样电压。 另外，该系统包括误差放大器，其被配置为处理与采样电压相关联的信号和阈值电压并产生第一输出信号，以及第一信号发生器，被配置为产生第二输出信号和一个或多个第三输出信号。 此外，该系统包括比较器，其被配置为接收第一输出信号和第二输出信号并产生比较信号，以及栅极驱动器，其直接或间接地耦合到比较器，并被配置为基于至少基于与 比较信号。

公开(公告)号：US08558609B2

公开(公告)日：2013-10-15

申请号：US13273067

申请日：2011-10-13

申请人： Lieyi Fang ,  Yunchao Zhang ,  Tingzhi Yuan

发明人： Lieyi Fang ,  Yunchao Zhang ,  Tingzhi Yuan

IPC分类号： H03F3/38

CPC分类号： H03F21/00 ,  H03K7/08

摘要： System and method for amplifying an input signal to generate an output signal. The system includes a current generator, an oscillator, and a comparator. The current generator is configured to receive a first voltage signal, and generate a first current signal based on at least information associated with the first voltage signal and the first reference signal. The oscillator is configured to receive at least the first current signal and a second reference signal, and to generate a second voltage signal based on at least information associated with the first current signal and the second reference signal, the second voltage signal being associated with a modulation frequency. Additionally, the comparator is configured to receive the second voltage signal and a third voltage signal, and to generate a modulation signal related to the modulation frequency based on at least information associated with the second voltage signal and the third voltage signal.

公开(公告)号：US20120147630A1

公开(公告)日：2012-06-14

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： H02M3/335

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：US08879283B2

公开(公告)日：2014-11-04

申请号：US12912050

申请日：2010-10-26

申请人： Dongze Yang ,  Yaming Cao ,  Yunchao Zhang ,  Lieyi Fang

发明人： Dongze Yang ,  Yaming Cao ,  Yunchao Zhang ,  Lieyi Fang

IPC分类号： H02M3/335 ,  H02M1/32 ,  H02M1/00

CPC分类号： H02M3/33515 ,  H02H7/1213 ,  H02M1/08 ,  H02M1/32 ,  H02M3/33507 ,  H02M2001/0009

摘要： System and method for protecting a power converter. The system includes a first comparator configured to receive a first 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. Additionally, the system includes a second comparator configured to receive a second threshold signal and the first signal and to generate a second comparison signal. The second threshold signal is different from the first threshold signal in magnitude. Moreover, the system includes a first detection component configured to receive at least the second comparison signal, detect the second comparison signal only if one or more predetermined conditions are satisfied, and generate a first detection signal based on at least information associated with the detected second comparison signal.

摘要翻译： 保护电源转换器的系统和方法。 该系统包括被配置为接收第一阈值信号和第一信号并产生第一比较信号的第一比较器。 第一个信号与功率转换器的输入电流相关联。 另外，该系统包括第二比较器，其被配置为接收第二阈值信号和第一信号并产生第二比较信号。 第二阈值信号的大小与第一阈值信号不同。 此外，该系统包括被配置为至少接收第二比较信号的第一检测组件，仅在满足一个或多个预定条件时检测第二比较信号，并且至少基于与检测到的第二比较信号相关联的信息产生第一检测信号 比较信号。

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：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。