公开(公告)号：US08736345B2

公开(公告)日：2014-05-27

申请号：US13415329

申请日：2012-03-08

申请人： Chao Yao ,  Tingzhi Yuan ,  Qiang Luo ,  Zhiliang Chen ,  Lieyi Fang

发明人： Chao Yao ,  Tingzhi Yuan ,  Qiang Luo ,  Zhiliang Chen ,  Lieyi Fang

IPC分类号： H03L5/00

CPC分类号： H03K19/0175 ,  H03K19/017527 ,  H03K2217/0063 ,  H03K2217/0081

摘要： System and method for controlling one or more switches. The system includes a first converting circuit, a second converting circuit, and a signal processing component. The first converting circuit is configured to convert a first current and generate a first converted voltage signal based on at least information associated with the first current. The second converting circuit is configured to convert a second current and generate a second converted voltage signal based on at least information associated with the second current. The signal processing component is configured to receive the first converted voltage signal and the second converted voltage signal and generate an output signal based on at least information associated with the first converted voltage signal and the second converted voltage signal.

摘要翻译： 用于控制一个或多个开关的系统和方法。 该系统包括第一转换电路，第二转换电路和信号处理部件。 第一转换电路被配置为转换第一电流并且至少基于与第一电流相关联的信息产生第一转换电压信号。 第二转换电路被配置为转换第二电流并且至少基于与第二电流相关联的信息产生第二转换电压信号。 信号处理部件被配置为接收第一转换电压信号和第二转换电压信号，并且至少基于与第一转换电压信号和第二转换电压信号相关联的信息产生输出信号。

公开(公告)号：US08723558B2

公开(公告)日：2014-05-13

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： H03K3/00

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：US20140022824A1

公开(公告)日：2014-01-23

申请号：US14034479

申请日：2013-09-23

申请人： ON-BRIGHT ELECTRONICS (SHANGHAI) CO., LTD.

发明人： Xiaomin Huang ,  Lieyi Fang

IPC分类号： H02M3/335

CPC分类号： H02M3/33507 ,  H02M3/33523 ,  H02M2001/0019

摘要： System and method for regulating an output voltage of a power conversion system. The system includes an error amplifier coupled to a capacitor. The error amplifier is configured to receive a reference voltage, a first voltage, and an adjustment current and to generate a compensation voltage with the capacitor. The first voltage is associated with a feedback voltage. Additionally, the system includes a current generator configured to receive the compensation voltage and generate the adjustment current and a first current, and a signal generator configured to receive the first current and a second current. The signal generator is further configured to receive a sensing voltage and to generate a modulation signal. Moreover, the system includes the gate driver directly or indirectly coupled to the signal generator and configured to generate a drive signal based on at least information associated with the modulation 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。 该系统包括耦合到电容器的误差放大器。 误差放大器被配置为接收参考电压，第一电压和调整电流，并且产生与电容器的补偿电压。 第一电压与反馈电压相关联。 另外，该系统包括配置成接收补偿电压并产生调整电流和第一电流的电流发生器，以及被配置为接收第一电流和第二电流的信号发生器。 信号发生器还被配置为接收感测电压并产生调制信号。 此外，该系统包括直接或间接地耦合到信号发生器并且被配置为基于至少基于与调制信号相关联的信息产生驱动信号的栅极驱动器。

公开(公告)号：US08618885B2

公开(公告)日：2013-12-31

申请号：US13081370

申请日：2011-04-06

申请人： Liqiang Zhu ,  Lieyi Fang

发明人： Liqiang Zhu ,  Lieyi Fang

IPC分类号： H03L7/18

CPC分类号： H03K3/01 ,  H03K5/1565 ,  H03K7/08 ,  H03M1/56 ,  H05B33/0815

摘要： Oscillator system and method thereof. The oscillator system includes a first voltage-to-current converter configured to receive a first voltage and generate a first current based on at least information associated with the first voltage, and a second voltage-to-current converter configured to receive a second voltage and generate a second current based on at least information associated with the second voltage. Additionally, the oscillator system further includes a current-mode N-bit digital-to-analog converter configured to receive at least the second current and a first clock signal and to generate a third current based on at least information associated with the second current and the first clock signal. N is a first integer. The first clock signal is associated with a first clock frequency corresponding to a first clock period. Moreover, the oscillator system further includes a current comparator coupled to the first voltage-to-current converter and the current-mode N-bit digital-to-analog converter.

摘要翻译： 振荡器系统及其方法。 振荡器系统包括第一电压 - 电流转换器，其被配置为接收第一电压并基于至少与第一电压相关联的信息产生第一电流，以及第二电压 - 电流转换器，被配置为接收第二电压和 至少基于与第二电压相关联的信息产生第二电流。 此外，振荡器系统还包括电流模式N位数模转换器，其被配置为至少接收第二电流和第一时钟信号，并且至少基于与第二电流相关联的信息产生第三电流，以及 第一个时钟信号。 N是第一个整数。 第一时钟信号与对应于第一时钟周期的第一时钟频率相关联。 此外，振荡器系统还包括耦合到第一电压 - 电流转换器和电流模式N位数模转换器的电流比较器。

公开(公告)号：US08598806B2

公开(公告)日：2013-12-03

申请号：US13335092

申请日：2011-12-22

申请人： Miao Li ,  Liqiang Zhu ,  Jun Zhou ,  Lieyi Fang

发明人： Miao Li ,  Liqiang Zhu ,  Jun Zhou ,  Lieyi Fang

IPC分类号： H05B41/36

CPC分类号： H05B41/282

摘要： System and method for driving one or more cold-cathode fluorescent lamps. For example, the method includes generating at least one drive signal associated with a signal frequency, the signal frequency being equal to a first predetermined frequency, receiving a current-sensing signal, the current-sensing signal being associated with a lamp current for the one or more cold-cathode fluorescent lamps in response to at least the first predetermined frequency, and determining whether the current-sensing signal is larger than a first threshold in magnitude, the current-sensing signal being related to the first predetermined frequency. Additionally, the method includes, if the current-sensing signal related to the first predetermined frequency is determined to be larger than the first threshold in magnitude at anytime during a first period of time, changing the signal frequency from the first predetermined frequency to a second predetermined frequency, the second predetermined frequency being different from the first predetermined frequency.

摘要翻译： 用于驱动一个或多个冷阴极荧光灯的系统和方法。 例如，该方法包括产生与信号频率相关联的至少一个驱动信号，信号频率等于第一预定频率，接收电流感测信号，该电流感测信号与一个灯电流相关联 或更多个冷阴极荧光灯，并且确定电流感测信号是否大于第一阈值，电流感测信号与第一预定频率相关。 另外，如果在第一时间段内的任何时间将与第一预定频率相关的电流感测信号的幅度确定为大于第一阈值，则将该信号频率从第一预定频率改变为第二阈值 预定频率，第二预定频率不同于第一预定频率。

公开(公告)号：US20130294121A1

公开(公告)日：2013-11-07

申请号：US13900430

申请日：2013-05-22

申请人： On-Bright Electronics (Shanghai) Co., Ltd.

发明人： Lieyi Fang ,  Shifeng Zhao ,  Bo Li ,  Zhiliang Chen

IPC分类号： H02H7/12

CPC分类号： H02H7/1203 ,  H02H7/12

摘要： System and method for protecting a power converter. A system includes a threshold generator configured to generate a threshold signal, and a first comparator configured to receive the threshold signal and a first signal and to generate a comparison signal. The first signal is associated with an input current for a power converter. Additionally, the system includes a pulse-width-modulation generator configured to receive the comparison signal and generate a modulation signal in response to the comparison signal, and a switch configured to receive the modulation signal and adjust the input current for the power converter. The threshold signal is associated with a threshold magnitude as a function of time. The threshold magnitude increases with time at a first slope during a first period, and the threshold magnitude increases with time at a second slope during a second period. The first slope and the second slope are different.

摘要翻译： 保护电源转换器的系统和方法。 一种系统包括被配置为产生阈值信号的阈值发生器，以及配置成接收阈值信号和第一信号并产生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：脉冲宽度调制发生器，被配置为接收比较信号并响应于比较信号产生调制信号;以及开关，被配置为接收调制信号并调整功率转换器的输入电流。 阈值信号与作为时间的函数的阈值幅度相关联。 阈值幅度在第一周期期间以第一斜率随时间增加，并且阈值幅度在第二周期期间以第二斜率随时间增加。 第一斜坡和第二斜坡不同。

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：US08536851B2

公开(公告)日：2013-09-17

申请号：US13288821

申请日：2011-11-03

申请人： Yuan Lin ,  Jun Ye ,  Lieyi Fang

发明人： Yuan Lin ,  Jun Ye ,  Lieyi Fang

IPC分类号： G05F5/00 ,  H02M3/335

CPC分类号： H02M3/33507 ,  H02M2001/0022 ,  Y02B70/1433

摘要： Switch-mode power conversion system and method thereof. The switch-mode power conversion system includes a primary winding configured to receive an input voltage, and a secondary winding coupled to the primary winding and configured to, with one or more other components, generate an output signal. Additionally, the switch-mode power conversion system includes a feedback component configured to receive the output signal and generate a feedback signal based on at least information associated with the output signal, and a voltage detector configured to receive the input voltage and output a detection signal. Moreover, the switch-mode power conversion system includes a mode controller configured to receive the detection signal and the feedback signal and generate a switch signal based on at least information associated with the detection signal and the feedback signal, and a switch configured to receive the switch signal and affect a first current flowing through the primary winding.

摘要翻译： 开关电源转换系统及其方法。 开关模式功率转换系统包括被配置为接收输入电压的初级绕组和耦合到初级绕组的次级绕组，并且被配置成与一个或多个其他部件一起产生输出信号。 另外，开关模式功率转换系统包括被配置为接收输出信号并基于至少与输出信号相关联的信息产生反馈信号的反馈分量，以及被配置为接收输入电压并输出检测信号的电压检测器 。 此外，开关模式电力转换系统包括模式控制器，其被配置为接收检测信号和反馈信号，并且至少基于与检测信号和反馈信号相关联的信息产生开关信号，以及开关，被配置为接收 开关信号并影响流经初级绕组的第一电流。

公开(公告)号：US20130200938A1

公开(公告)日：2013-08-08

申请号：US13415329

申请日：2012-03-08

申请人： Chao Yao ,  Tingzhi Yuan ,  Qiang Luo ,  Zhiliang Chen ,  Lieyi Fang

发明人： Chao Yao ,  Tingzhi Yuan ,  Qiang Luo ,  Zhiliang Chen ,  Lieyi Fang

IPC分类号： H03K17/00

CPC分类号： H03K19/0175 ,  H03K19/017527 ,  H03K2217/0063 ,  H03K2217/0081

摘要： System and method for controlling one or more switches. The system includes a first converting circuit, a second converting circuit, and a signal processing component. The first converting circuit is configured to convert a first current and generate a first converted voltage signal based on at least information associated with the first current. The second converting circuit is configured to convert a second current and generate a second converted voltage signal based on at least information associated with the second current. The signal processing component is configured to receive the first converted voltage signal and the second converted voltage signal and generate an output signal based on at least information associated with the first converted voltage signal and the second converted voltage signal.

摘要翻译： 用于控制一个或多个开关的系统和方法。 该系统包括第一转换电路，第二转换电路和信号处理部件。 第一转换电路被配置为转换第一电流并且至少基于与第一电流相关联的信息产生第一转换电压信号。 第二转换电路被配置为转换第二电流并且至少基于与第二电流相关联的信息产生第二转换电压信号。 信号处理部件被配置为接收第一转换电压信号和第二转换电压信号，并且至少基于与第一转换电压信号和第二转换电压信号相关联的信息产生输出信号。

公开(公告)号：US20130033905A1

公开(公告)日：2013-02-07

申请号：US13215028

申请日：2011-08-22

申请人： Yuan Lin ,  Zhenglan Xia ,  Xiuhong Zhang ,  Lieyi Fang

发明人： Yuan Lin ,  Zhenglan Xia ,  Xiuhong Zhang ,  Lieyi Fang

IPC分类号： H02M3/335

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

摘要： System and method for regulating a power converter. The system includes a first comparator configured to receive a first input signal and a second input signal and generate a first comparison signal based on at least information associated with the first input signal and the second input signal, a pulse-width-modulation generator configured to receive at least the first comparison signal and generate a modulation signal based on at least information associated with the first comparison signal, a driver component configured to receive the modulation signal and output a drive signal to a switch to adjust a primary current flowing through a primary winding of the power converter, and a voltage-change-rate detection component configured to sample the feedback signal to generate a first sampled signal for a first modulation period and to sample the feedback signal to generate a second sampled signal for a second modulation period.