公开(公告)号：US20070139095A1

公开(公告)日：2007-06-21

申请号：US11327155

申请日：2006-01-05

申请人： Lieyi Fang ,  Shifeng Zhao ,  Zhiliang Chen ,  Zhenhua Li

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

IPC分类号： H03K17/687

CPC分类号： H03K17/60 ,  H02M1/08 ,  H02M3/33507 ,  H03K17/0826 ,  H03K17/22 ,  H03K17/605 ,  H03K17/64

摘要： A system and method for driving a bipolar junction transistor is provided. The system includes a first transistor including a first gate, a first terminal, and a second terminal. The first gate is configured to receive a first control signal. Additionally, the system includes a second transistor including a second gate, a third terminal, and a fourth terminal. The second gate is configured to receive a second control signal. Moreover, the system includes a first resistor including a fifth terminal and a sixth terminal. The fifth terminal is connected to the first terminal, and the sixth terminal is biased to a first predetermined voltage. The fourth terminal is biased to a second predetermined voltage. The second terminal and the third terminal are connected at a node, and the node is connected to a base for a bipolar junction transistor.

摘要翻译： 提供一种用于驱动双极结型晶体管的系统和方法。 该系统包括第一晶体管，其包括第一栅极，第一端子和第二端子。 第一门被配置为接收第一控制信号。 另外，该系统包括包括第二栅极，第三端子和第四端子的第二晶体管。 第二门被配置为接收第二控制信号。 此外，该系统包括包括第五端子和第六端子的第一电阻器。 第五端子连接到第一端子，第六端子被偏置到第一预定电压。 第四端子偏置到第二预定电压。 第二端子和第三端子连接在节点处，并且节点连接到用于双极结型晶体管的基极。

公开(公告)号：US20070041228A1

公开(公告)日：2007-02-22

申请号：US11213657

申请日：2005-08-26

申请人： Lieyi Fang ,  Shifeng Zhao ,  Bo Li ,  Zhiliang Chen

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

IPC分类号： H02H7/10

CPC分类号： H02M3/33507 ,  H02M1/32

摘要： System and method for protecting a power converter. The system includes a first comparator configured to receive a threshold signal and a first signal and to generate a comparison signal. The first signal is a sum of a second signal and a third signal, and the third 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 control the input current for the power converter. An amplitude for the first signal becomes larger if an amplitude for the input voltage becomes larger. The second signal is generated by receiving an input voltage for the power converter, converting the received input voltage to a fourth signal, and converting the fourth signal to the second 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阈值信号和第一信号并产生比较信号的第一比较器。 第一信号是第二信号和第三信号的和，并且第三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控制功率转换器的输入电流。 如果输入电压的幅度变大，则第一信号的振幅变大。 通过接收功率转换器的输入电压，将接收到的输入电压转换为第四信号，并将第四信号转换为第二信号，产生第二信号。

公开(公告)号：US6016002A

公开(公告)日：2000-01-18

申请号：US993820

申请日：1997-12-18

申请人： Julian Zhiliang Chen ,  Thomas A. Vrotsos ,  Wayne T. Chen

发明人： Julian Zhiliang Chen ,  Thomas A. Vrotsos ,  Wayne T. Chen

IPC分类号： H01L29/74 ,  H01L23/60 ,  H01L27/02 ,  H02H7/20 ,  H02H9/04 ,  H05F3/02 ,  H01L23/62 ,  H01L29/00 ,  H01L31/111

CPC分类号： H01L27/0262 ,  H01L27/0266 ,  H01L2924/0002

摘要： An SCR (68) for protecting an integrated circuit (62) against ESD events is provided having a trigger voltage which is automatically adjusted to different trigger voltage levels in response to power being applied to the integrated circuit (62). An enhancement-type P-channel transistor (78) is provided for determining the trigger voltage. When operating power is not being applied to the integrated circuit (62), the P-channel transistor (78) threshold voltage determines the voltage at which the SCR (68) is triggered. When operating power is being applied to the integrated circuit (62), the operating voltage is applied to the gate of the P-channel transistor (78), and then the operating voltage and the threshold voltage for the P-channel transistor (78) determine the trigger voltage of the SCR (68). Then, a PNP and NPN transistor pair (76, 80) that form the SCR (68) are latched to shunt the protected signal path (69) to ground. The SCR (68) remains latched until the voltage applied to the signal path (69) falls beneath a holding voltage of the SCR (68). A plurality of the SCRs (126, 128) may be connected in series, such that the overall holding voltage for the series of SCRs (126, 128) is approximately equal to the sum of the individual holding voltages for the SCRs (126, 128), which overall holding voltage is greater than the trigger voltage. Preferably, the SCR (68) is isolated from the P substrate (92) by a P-N junction which is provided by disposing the SCR (68) within an N-tank (98).

摘要翻译： 提供了用于保护集成电路（62）抵抗ESD事件的SCR（68），其具有响应于施加到集成电路（62）的功率而被自动调整到不同触发电压电平的触发电压。 提供增强型P沟道晶体管（78）用于确定触发电压。 当工作电源未被施加到集成电路（62）时，P沟道晶体管（78）阈值电压确定触发SCR（68）的电压。 当工作电源施加到集成电路（62）时，工作电压被施加到P沟道晶体管（78）的栅极，然后P沟道晶体管（78）的工作电压和阈值电压 确定SCR（68）的触发电压。 然后，形成SCR（68）的PNP和NPN晶体管对（76,80）被锁存以将受保护的信号路径（69）分流到地。 SCR（68）保持锁存，直到施加到信号路径（69）的电压落在SCR（68）的保持电压以下。 多个SCR（126,128）可以串联连接，使得SCR系列（126,128）的整体保持电压近似等于SCR的各个保持电压之和（126,128 ），其总保持电压大于触发电压。 优选地，SCR（68）通过将SCR（68）设置在N-罐（98）内而提供的P-N结与P基板（92）隔离。

公开(公告)号：US08537573B2

公开(公告)日：2013-09-17

申请号：US12958274

申请日：2010-12-01

申请人： Jun Ye ,  Zhen Zhu ,  Shifeng Zhao ,  Zhiliang Chen ,  Lieyi Fang

发明人： Jun Ye ,  Zhen Zhu ,  Shifeng Zhao ,  Zhiliang Chen ,  Lieyi Fang

IPC分类号： H02M3/335

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

摘要： System and method for providing control for switch-mode power supply. According to an embodiment, the present invention provides a system for regulating a power converter. The system comprises a signal processing component that is configured to receive a first voltage and a second voltage, to process information associated with the first voltage and the second voltage, to determine a signal based on at least information associated with the first voltage and the second voltage, and to send the signal to a switch for a power converter. The switch is regulated based on at least information associated with the signal. The signal processing component is further configured to determine the signal to be associated a first mode, if the first voltage is higher than a first threshold.

公开(公告)号：US20120300507A1

公开(公告)日：2012-11-29

申请号：US13350059

申请日：2012-01-13

申请人： Zhiliang Chen ,  Xiuhong Zhang ,  Jun Ye ,  Shifeng Zhao ,  Lieyi Fang

发明人： Zhiliang Chen ,  Xiuhong Zhang ,  Jun Ye ,  Shifeng Zhao ,  Lieyi Fang

IPC分类号： H02M3/335

CPC分类号： H02M3/33523 ,  H02M1/44

摘要： Switch mode power converter system and method thereof. The system includes one or more isolation boxes including at least a first isolation box, an input primary winding for receiving an input signal for the switch mode power converter system, and an output secondary winding for generating an output signal for the switch mode power converter system. The switch mode power converter system is configured to convert the input signal to the output signal. One of the input primary winding and the output secondary winding is substantially enclosed in the first isolation box, and the other of the input primary winding and the output secondary winding is not enclosed in the first isolation box. The first isolation box is conductively connected to a constant-voltage source.

摘要翻译： 开关电源转换器系统及其方法。 该系统包括一个或多个隔离箱，其包括至少第一隔离箱，用于接收开关模式功率转换器系统的输入信号的输入初级绕组和用于产生开关模式功率转换器系统的输出信号的输出次级绕组 。 开关模式功率转换器系统被配置为将输入信号转换成输出信号。 输入初级绕组和输出次级绕组中的一个基本上封装在第一隔离箱中，另一个输入初级绕组和输出次级绕组未封装在第一隔离箱中。 第一隔离箱与恒压源导电连接。

公开(公告)号：US20110292698A1

公开(公告)日：2011-12-01

申请号：US13205417

申请日：2011-08-08

申请人： Lieyi Fang ,  Shifeng Zhao ,  Bo Li ,  Zhiliang Chen

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

IPC分类号： H02H7/10

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：US20110292694A1

公开(公告)日：2011-12-01

申请号：US12958274

申请日：2010-12-01

申请人： Jun Ye ,  Zhen Zhu ,  Shifeng Zhao ,  Zhiliang Chen ,  Lieyi Fang

发明人： Jun Ye ,  Zhen Zhu ,  Shifeng Zhao ,  Zhiliang Chen ,  Lieyi Fang

IPC分类号： H02M3/335

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

摘要： System and method for providing control for switch-mode power supply. According to an embodiment, the present invention provides a system for regulating a power converter. The system comprises a signal processing component that is configured to receive a first voltage and a second voltage, to process information associated with the first voltage and the second voltage, to determine a signal based on at least information associated with the first voltage and the second voltage, and to send the signal to a switch for a power converter. The switch is regulated based on at least information associated with the signal. The signal processing component is further configured to determine the signal to be associated a first mode, if the first voltage is higher than a first threshold.

摘要翻译： 提供开关电源控制的系统和方法。 根据实施例，本发明提供一种用于调节功率转换器的系统。 该系统包括信号处理部件，其被配置为接收第一电压和第二电压，以处理与第一电压和第二电压相关联的信息，以至少基于与第一电压和第二电压相关联的信息来确定信号 电压，并将信号发送到电源转换器的开关。 至少基于与信号相关联的信息来调节开关。 信号处理部件还被配置为如果第一电压高于第一阈值，则确定与第一模式相关联的信号。

公开(公告)号：US20110266960A1

公开(公告)日：2011-11-03

申请号：US12958275

申请日：2010-12-01

申请人： Lieyi Fang ,  Changshan Zhang ,  Zhiliang Chen ,  Shifeng Zhao

发明人： Lieyi Fang ,  Changshan Zhang ,  Zhiliang Chen ,  Shifeng Zhao

IPC分类号： H05B41/36

CPC分类号： H05B41/2822

摘要： System and method for driving a plurality of cold-cathode fluorescent lamps. The system includes a subsystem configured to receive at least a DC voltage and generate a first AC voltage in response to at least the DC voltage, a power converter configured to receive the first AC voltage and convert the first AC voltage to at least a second AC voltage, and a plurality of current balancing devices. Each of the plurality of current balancing devices is configured to receive two currents and balance the two currents. The power converter and the plurality of current balancing devices are capable of being directly or indirectly coupled to a plurality of cold-cathode fluorescent lamps.

摘要翻译： 用于驱动多个冷阴极荧光灯的系统和方法。 该系统包括被配置为接收至少DC电压并响应于至少DC电压产生第一AC电压的子系统，被配置为接收第一AC电压并将第一AC电压转换为至少第二AC 电压和多个电流平衡装置。 多个电流平衡装置中的每一个配置成接收两个电流并平衡两个电流。 功率转换器和多个电流平衡装置能够直接或间接耦合到多个冷阴极荧光灯。

公开(公告)号：US07990202B2

公开(公告)日：2011-08-02

申请号：US11327155

申请日：2006-01-05

申请人： Lieyi Fang ,  Shifeng Zhao ,  Zhiliang Chen ,  Zhenhua Li

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

IPC分类号： H03K17/687

CPC分类号： H03K17/60 ,  H02M1/08 ,  H02M3/33507 ,  H03K17/0826 ,  H03K17/22 ,  H03K17/605 ,  H03K17/64

摘要： A system and method for driving a bipolar junction transistor is provided. The system includes a first transistor including a first gate, a first terminal, and a second terminal. The first gate is configured to receive a first control signal. Additionally, the system includes a second transistor including a second gate, a third terminal, and a fourth terminal. The second gate is configured to receive a second control signal. Moreover, the system includes a first resistor including a fifth terminal and a sixth terminal. The fifth terminal is connected to the first terminal, and the sixth terminal is biased to a first predetermined voltage. The fourth terminal is biased to a second predetermined voltage. The second terminal and the third terminal are connected at a node, and the node is connected to a base for a bipolar junction transistor.

摘要翻译： 提供一种用于驱动双极结型晶体管的系统和方法。 该系统包括第一晶体管，其包括第一栅极，第一端子和第二端子。 第一门被配置为接收第一控制信号。 另外，该系统包括包括第二栅极，第三端子和第四端子的第二晶体管。 第二门被配置为接收第二控制信号。 此外，该系统包括包括第五端子和第六端子的第一电阻器。 第五端子连接到第一端子，第六端子被偏置到第一预定电压。 第四端子偏置到第二预定电压。 第二端子和第三端子连接在节点处，并且节点连接到用于双极结型晶体管的基极。

公开(公告)号：US07795851B2

公开(公告)日：2010-09-14

申请号：US11102574

申请日：2005-04-07

申请人： Jun Ye ,  Zhen Zhu ,  Shifeng Zhao ,  Lieyi Fang ,  Zhiliang Chen

发明人： Jun Ye ,  Zhen Zhu ,  Shifeng Zhao ,  Lieyi Fang ,  Zhiliang Chen

IPC分类号： G05F1/575

CPC分类号： H02M3/156 ,  H02M2001/0032 ,  H03K3/0231 ,  H04Q2213/1308 ,  H04Q2213/13098 ,  H04Q2213/1332 ,  Y02B70/16

摘要： System and method for providing frequency control to a power converter. The system includes a controller configured to receive a load signal and generate a first control signal. The load signal indicates an output load for a power converter. Additionally, the system includes a signal generator configured to receive the first control signal and generates at least a first output signal. The first output signal is associated with a first signal strength and a first frequency. The first frequency is inversely proportional to a sum of a first time period, a second time period, and a third time period. The first signal strength increases with the time during the first time period, the first signal strength decreases with the time during the second time period, and the first signal strength is constant with respect to the time during the third time period.

摘要翻译： 向功率转换器提供频率控制的系统和方法。 该系统包括被配置为接收负载信号并产生第一控制信号的控制器。 负载信号表示电源转换器的输出负载。 另外，该系统包括被配置为接收第一控制信号并产生至少第一输出信号的信号发生器。 第一输出信号与第一信号强度和第一频率相关联。 第一频率与第一时间段，第二时间段和第三时间段的和成反比。 第一信号强度随着第一时间段期间的时间增加，第一信号强度随着第二时间段期间的时间而减小，并且第一信号强度相对于第三时间段内的时间是恒定的。