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1. 发明授权

US08482946B2 System and method providing over current and over power protection for power converter 有权
标题翻译：为电源转换器提供过流和过电源保护的系统和方法
公开(公告)号：US08482946B2
公开(公告)日：2013-07-09
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： H02H7/122
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。

2. 发明授权

US08391332B2 System and method for controlling variations of switching frequency 有权
标题翻译：用于控制开关频率变化的系统和方法
公开(公告)号：US08391332B2
公开(公告)日：2013-03-05
申请号：US12691624
申请日：2010-01-21
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： H04B1/00
CPC分类号： H03K7/08 , H02M1/44 , H02M3/156
摘要： System and method for providing frequency control to a power converter. The system includes a pseudorandom signal generator configured to generate a digital signal. The digital signal is associated with at least an N-bit datum, and N is a positive integer. Additionally, the system includes a digital-to-analog converter configured to receive the digital signal and generate a first control signal, an output signal generator configured to receive the first control signal and generate at least a first output signal associated with a frequency, and a pulse-width-modulation generator configured to receive at least the first output signal. The N-bit datum represents a pseudorandom number.
摘要翻译：用于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产生数字信号的伪随机信号发生器。数字信号与至少一个N位数据相关联，N是正整数。另外，该系统包括被配置为接收数字信号并产生第一控制信号的数模转换器，被配置为接收第一控制信号并产生与频率相关联的至少第一输出信号的输出信号发生器，以及脉冲宽度调制发生器，被配置为至少接收第一输出信号。 N位数据表示伪随机数。

3. 发明授权

US08379415B2 Systems and methods for reducing EMI in switch mode converter systems 有权
标题翻译：在开关模式转换器系统中降低EMI的系统和方法
公开(公告)号：US08379415B2
公开(公告)日：2013-02-19
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 , H02M3/156
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。

4. 发明授权

US08125802B2 Systems and methods for reducing EMI in switch mode converter systems 有权
标题翻译：在开关模式转换器系统中降低EMI的系统和方法
公开(公告)号：US08125802B2
公开(公告)日：2012-02-28
申请号：US12055577
申请日：2008-03-26
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 , H02M3/156
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。

5. 发明授权

US07859806B2 System and method of electrostatic discharge protection for signals at various voltages 有权
标题翻译：各种电压信号的静电放电保护系统及方法
公开(公告)号：US07859806B2
公开(公告)日：2010-12-28
申请号：US12103608
申请日：2008-04-15
申请人： Zhiliang Chen , Shifeng Zhao , Lieyi Fang , Zhen Zhu , Jun Ye
发明人： Zhiliang Chen , Shifeng Zhao , Lieyi Fang , Zhen Zhu , Jun Ye
IPC分类号： H02H9/00
CPC分类号： H01L27/0285
摘要： System and method for protecting an integrated circuit. The system includes a first transistor coupled to a first voltage and a second voltage, a second transistor coupled to the gate of the first transistor and the first voltage, a third transistor coupled to the gate of the second transistor and the first voltage, and a capacitor coupled to the gate of the second transistor and the second voltage. The first voltage is provided to the integrated circuit, the gate of the third transistor is configured to receive a first control signal, the gate of the second transistor is configured to receive a second control signal, and the second control signal is capable of turning off the second transistor a time period after the third transistor is turned off.
摘要翻译：用于保护集成电路的系统和方法。该系统包括耦合到第一电压和第二电压的第一晶体管，耦合到第一晶体管的栅极和第一电压的第二晶体管，耦合到第二晶体管的栅极和第一电压的第三晶体管，以及电容器耦合到第二晶体管的栅极和第二电压。将第一电压提供给集成电路，第三晶体管的栅极被配置为接收第一控制信号，第二晶体管的栅极被配置为接收第二控制信号，并且第二控制信号能够关断第二晶体管在第三晶体管截止之后的时间周期。

6. 发明申请

US20080238375A1 SYSTEMS AND METHODS FOR REDUCING EMI IN SWITCH MODE CONVERTER SYSTEMS 有权
标题翻译：用于在开关模式转换器系统中降低EMI的系统和方法
公开(公告)号：US20080238375A1
公开(公告)日：2008-10-02
申请号：US12055577
申请日：2008-03-26
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： G05F1/10
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。

7. 发明申请

US20080212248A1 Adaptive multi-level threshold system and method for power converter protection 有权
标题翻译：自适应多电平阈值系统和电源转换器保护方法
公开(公告)号：US20080212248A1
公开(公告)日：2008-09-04
申请号：US12031242
申请日：2008-02-14
申请人： Zhen Zhu , Jun Ye , Shifeng Zhao , Lieyi Fang , Zhiliang Chen
发明人： Zhen Zhu , Jun Ye , Shifeng Zhao , Lieyi Fang , Zhiliang Chen
IPC分类号： H02H3/00
CPC分类号： H02M1/32 , H02M3/33507
摘要： System and method for protecting a power converter. The system includes a compensation system configured to receive an input signal and generate a control signal, a cycle threshold generator configured to receive the control signal and generate a cycle threshold, and a comparator configured to receive the cycle threshold and a feedback signal and generate a comparison signal. 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 an input current for a power converter. The input current is associated with an output power for the power converter. The cycle threshold corresponds to a threshold power level for the output power. The threshold power level is constant, decreases, or increases with respect to the input 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输入信号并产生控制信号的补偿系统，配置成接收控制信号并产生周期阈值的周期阈值发生器，以及配置成接收周期阈值和反馈信号并产生比较信号。此外，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。输入电流与功率转换器的输出功率有关。周期阈值对应于输出功率的阈值功率电平。阈值功率电平相对于输入信号是恒定的，减小的或增加的。

8. 发明申请

US20070279820A1 SYSTEM AND METHOD PROVIDING OVER CURRENT AND OVER POWER PROTECTION FOR POWER CONVERTER 有权
标题翻译：为电源转换器提供电流和功率保护的系统和方法
公开(公告)号：US20070279820A1
公开(公告)日：2007-12-06
申请号：US11752926
申请日：2007-05-24
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： H02H3/00
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。

9. 发明申请

US20070139095A1 System and method for driving bipolar transistors in switching power conversion 有权
标题翻译：用于在开关电源转换中驱动双极晶体管的系统和方法
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。

10. 发明申请

US20070041228A1 Control system and method with constant maximum current for power converter protection 有权
标题翻译：功率转换器保护恒定最大电流的控制系统和方法
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。

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