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11. 发明授权

US08804380B2 Zero standby switching power supply solution 有权
标题翻译：零备用开关电源解决方案
公开(公告)号：US08804380B2
公开(公告)日：2014-08-12
申请号：US13436779
申请日：2012-03-30
申请人： Xiaoru Gao , Yajiang Zhu , Chao Chen , Meiling Zhang
发明人： Xiaoru Gao , Yajiang Zhu , Chao Chen , Meiling Zhang
IPC分类号： H02M3/335 , H02M3/315
CPC分类号： H02M3/335 , H02M3/33507 , H02M2001/0032 , Y02B70/16
摘要： A switching mode power supply (SMPS) includes a power transistor coupled to the primary winding of transformer and a resistor coupled between the input power source and a control terminal of the power transistor for triggering a primary current flow through the power transistor for providing startup power. A primary side control circuit is configured to regulate the output of the SMPS. A secondary side control circuit is coupled to the secondary winding and being configured to provide a first electrical signal to the secondary winding when an output voltage of the SMPS is less than a first reference voltage, whereupon an awakening signal is induced in the auxiliary winding and causes the primary side control circuit to provide a turn-on signal to the power transistor. The primary side control circuit is configured to enter a standby mode or a normal operating mode in response to the awakening signal.
摘要翻译：开关模式电源（SMPS）包括耦合到变压器的初级绕组的功率晶体管和耦合在输入电源和功率晶体管的控制端之间的电阻器，用于触发通过功率晶体管的初级电流以提供启动功率。初级侧控制电路被配置为调节SMPS的输出。次级侧控制电路耦合到次级绕组，并且被配置为当SMPS的输出电压小于第一参考电压时，向次级绕组提供第一电信号，于是在辅助绕组中感应出唤醒信号，使得初级侧控制电路向功率晶体管提供导通信号。初级侧控制电路被配置为响应于唤醒信号进入待机模式或正常操作模式。

12. 发明授权

US08526202B2 System and method for synchronous rectifier 有权
标题翻译：同步整流系统及方法
公开(公告)号：US08526202B2
公开(公告)日：2013-09-03
申请号：US12604246
申请日：2009-10-22
申请人： ShaoHua Fang , BaoZhen Chen , Qiang Zong , YaJiang Zhu
发明人： ShaoHua Fang , BaoZhen Chen , Qiang Zong , YaJiang Zhu
IPC分类号： H02M7/217
CPC分类号： H02M3/33592 , H02M3/33561 , H02M3/33576 , H02M7/217 , H03K5/08 , H03K17/133 , H03K17/302 , H03K2017/307 , Y02B70/1475
摘要： A synchronous rectification circuit for a power converter includes a power switch coupled to a transformer and an output capacitor and a switching control circuit configured to provide a control signal to the power switch in response to a first state and a second state of the voltage across the power switch. In the switching control circuit, the second state is determined prior to the first state is determined. In an embodiment, the switching control circuit includes a voltage comparing unit configured to act in response to the first and second inputs. The voltage comparing unit is also configured to output a logic signal according to the voltage difference between the sensed voltage drop across the power switch and a reference threshold voltage. A logic processing circuit is coupled to the voltage comparing unit and configured to provide the first state and the second state of the voltage across the power switch.
摘要翻译：用于功率转换器的同步整流电路包括耦合到变压器的电源开关和输出电容器，以及开关控制电路，其被配置为响应于第一状态和第二状态的电压来向功率开关提供控制信号开关;电源开关。在开关控制电路中，在确定第一状态之前确定第二状态。在一个实施例中，开关控制电路包括被配置为响应于第一和第二输入而动作的电压比较单元。电压比较单元还被配置为根据感测到的电源开关上的电压降与参考阈值电压之间的电压差输出逻辑信号。逻辑处理电路耦合到电压比较单元并且被配置为在电源开关上提供电压的第一状态和第二状态。

13. 发明授权

US08125799B2 Control circuits and methods for switching mode power supplies 有权
标题翻译：用于切换模式电源的控制电路和方法
公开(公告)号：US08125799B2
公开(公告)日：2012-02-28
申请号：US12605081
申请日：2009-10-23
申请人： YaJiang Zhu , Jia Xie , Yongbo Zhang , Chao Chen , Shuzhuang Lv
发明人： YaJiang Zhu , Jia Xie , Yongbo Zhang , Chao Chen , Shuzhuang Lv
IPC分类号： H02M3/335
CPC分类号： H02M3/33523
摘要： Circuits and method for sensing a system output voltage change and transmitting an electrical signal to an auxiliary winding on the primary side. In an embodiment, a primary side controller detects the electrical signal and turns a power switch on and off to transfer energy from a primary winding to a secondary winding. A secondary side controller generates a voltage pulse at a terminal of the secondary winding when the system output voltage is below a reference voltage. The secondary side controller includes an input terminal connected to a system output, an output terminal connected to a terminal of the secondary winding, and a ground terminal connected to a ground potential of the system output.
摘要翻译：用于感测系统输出电压的电路和方法改变并将电信号发送到初级侧的辅助绕组。在一个实施例中，初级侧控制器检测电信号并打开和关闭电源开关以将能量从初级绕组传递到次级绕组。当系统输出电压低于参考电压时，次级侧控制器在次级绕组的端子处产生电压脉冲。次级侧控制器包括连接到系统输出的输入端子，连接到次级绕组的端子的输出端子和连接到系统输出的地电位的接地端子。

14. 发明申请

US20110261596A1 CONTROL CIRCUIT FOR PRIMARY SIDE CONTROL OF SWITCHING POWER SUPPLY 有权
标题翻译：用于开关电源初级控制的控制电路
公开(公告)号：US20110261596A1
公开(公告)日：2011-10-27
申请号：US13090680
申请日：2011-04-20
申请人： Qiang Zong , Huizhen Zhu , Pingan Zhao , Yajiang Zhu
发明人： Qiang Zong , Huizhen Zhu , Pingan Zhao , Yajiang Zhu
IPC分类号： H02M3/335
CPC分类号： H02M3/33507
摘要： A switched mode power supply (SMPS) includes a transformer with a primary winding, a secondary winding, an auxiliary winding, and a power switch coupled to the primary winding. During one switching cycle, the auxiliary winding provides a feedback signal which includes a first voltage pulse that is induced after the power switch is turned on and a second voltage pulse that is induced after the power switch is turned off. A control circuit includes a circuit for generating a sampling signal for sampling the second voltage pulse in a switching cycle at a time that is determined based on the first voltage pulse in the same switching cycle. A sample-and-hold circuit is configured for sampling and storing the second voltage pulse in response to the sampling signal. A switching signal generating circuit is configured to generate a switching signal for controlling the power switch based on an output of the sample-and-hold circuit.
摘要翻译：开关模式电源（SMPS）包括具有初级绕组的变压器，次级绕组，辅助绕组和耦合到初级绕组的功率开关。在一个开关周期期间，辅助绕组提供反馈信号，该反馈信号包括在电源开关导通之后感应的第一电压脉冲和在电源开关断开之后引起的第二电压脉冲。控制电路包括用于产生采样信号的电路，所述采样信号用于在基于相同切换周期中的第一电压脉冲确定的时间的开关周期中对第二电压脉冲进行采样。采样保持电路被配置为响应于采样信号对第二电压脉冲进行采样和存储。开关信号发生电路被配置为基于采样保持电路的输出产生用于控制功率开关的开关信号。

15. 发明申请

US20110096573A1 CONTROL CIRCUITS AND METHODS FOR SWITCHING MODE POWER SUPPLIES 有权
标题翻译：用于切换模式电源的控制电路和方法
公开(公告)号：US20110096573A1
公开(公告)日：2011-04-28
申请号：US12605081
申请日：2009-10-23
申请人： YaJiang Zhu , Jia Xie , Yongbo Zhang , Chao Chen , Shuzhuang Lv
发明人： YaJiang Zhu , Jia Xie , Yongbo Zhang , Chao Chen , Shuzhuang Lv
IPC分类号： H02M3/335
CPC分类号： H02M3/33523
摘要： Circuits and method for sensing a system output voltage change and transmitting an electrical signal to an auxiliary winding on the primary side. In an embodiment, a primary side controller detects the electrical signal and turns a power switch on and off to transfer energy from a primary winding to a secondary winding. A secondary side controller generates a voltage pulse at a terminal of the secondary winding when the system output voltage is below a reference voltage. The secondary side controller includes an input terminal connected to a system output, an output terminal connected to a terminal of the secondary winding, and a ground terminal connected to a ground potential of the system output.
摘要翻译：用于感测系统输出电压的电路和方法改变并将电信号发送到初级侧的辅助绕组。在一个实施例中，初级侧控制器检测电信号并打开和关闭电源开关以将能量从初级绕组传递到次级绕组。当系统输出电压低于参考电压时，次级侧控制器在次级绕组的端子处产生电压脉冲。次级侧控制器包括连接到系统输出的输入端子，连接到次级绕组的端子的输出端子和连接到系统输出的地电位的接地端子。

16. 发明授权

US09112426B2 High power-factor control circuit and method for switched mode power supply 有权
标题翻译：高功率因数控制电路和开关电源的方法
公开(公告)号：US09112426B2
公开(公告)日：2015-08-18
申请号：US13050236
申请日：2011-03-17
申请人： Shihai Zhu , Zeqiang Chen , Xuegang Ren , Yajiang Zhu
发明人： Shihai Zhu , Zeqiang Chen , Xuegang Ren , Yajiang Zhu
IPC分类号： H05B41/282 , H02M1/42 , H05B33/08
CPC分类号： H02M3/33507 , H02M1/4258 , H05B33/0815 , H05B33/0818 , Y02B20/347 , Y02B70/126
摘要： A switch mode power supply (SMPS) system includes a rectifying circuit for coupling to an AC input voltage and a transformer having a primary winding for coupling to the rectifying circuit and a secondary winding coupled to the primary winding. The system also has a power switch coupled to the primary winding and a control circuit coupled to the power switch. The control circuit is configured to control current flow in the primary winding such that an envelop waveform formed by peak points of current pulses are in phase with the magnitude of the AC input voltage. Moreover, the SMPS system is configured to provide a constant average output current.
摘要翻译：开关模式电源（SMPS）系统包括用于耦合到AC输入电压的整流电路和具有用于耦合到整流电路的初级绕组和耦合到初级绕组的次级绕组的变压器。该系统还具有耦合到初级绕组的功率开关和耦合到功率开关的控制电路。控制电路被配置为控制初级绕组中的电流流动，使得由电流脉冲的峰值点形成的包络波形与AC输入电压的大小相同。此外，SMPS系统被配置为提供恒定的平均输出电流。

17. 发明授权

US09083246B2 Control circuit for primary side control of switching power supply 有权
标题翻译：开关电源初级侧控制控制电路
公开(公告)号：US09083246B2
公开(公告)日：2015-07-14
申请号：US13090680
申请日：2011-04-20
申请人： Qiang Zong , Huizhen Zhu , Pingan Zhao , Yajiang Zhu
发明人： Qiang Zong , Huizhen Zhu , Pingan Zhao , Yajiang Zhu
IPC分类号： H02M3/335
CPC分类号： H02M3/33507
摘要： A switched mode power supply (SMPS) includes a transformer with a primary winding, a secondary winding, an auxiliary winding, and a power switch coupled to the primary winding. During one switching cycle, the auxiliary winding provides a feedback signal which includes a first voltage pulse that is induced after the power switch is turned on and a second voltage pulse that is induced after the power switch is turned off. A control circuit includes a circuit for generating a sampling signal for sampling the second voltage pulse in a switching cycle at a time that is determined based on the first voltage pulse in the same switching cycle. A sample-and-hold circuit is configured for sampling and storing the second voltage pulse in response to the sampling signal. A switching signal generating circuit is configured to generate a switching signal for controlling the power switch based on an output of the sample-and-hold circuit.
摘要翻译：开关模式电源（SMPS）包括具有初级绕组的变压器，次级绕组，辅助绕组和耦合到初级绕组的功率开关。在一个开关周期期间，辅助绕组提供反馈信号，该反馈信号包括在电源开关导通之后感应的第一电压脉冲和在电源开关断开之后引起的第二电压脉冲。控制电路包括用于产生采样信号的电路，所述采样信号用于在基于相同切换周期中的第一电压脉冲确定的时间的开关周期中对第二电压脉冲进行采样。采样保持电路被配置为响应于采样信号对第二电压脉冲进行采样和存储。开关信号发生电路被配置为基于采样保持电路的输出产生用于控制功率开关的开关信号。

18. 发明授权

US08482943B2 Power transistor driving circuits and methods for switching mode power supplies 有权
标题翻译：功率晶体管驱动电路和开关模式电源的方法
公开(公告)号：US08482943B2
公开(公告)日：2013-07-09
申请号：US12638809
申请日：2009-12-15
申请人： Jianhua Duan , Qiang Zong , Yajiang Zhu
发明人： Jianhua Duan , Qiang Zong , Yajiang Zhu
IPC分类号： H02M1/12 , H02M3/335
CPC分类号： H03K17/16 , G05F3/26 , G05F3/267 , G05F3/30 , H02M3/33507 , H03K17/04123 , H03K2217/0036
摘要： A power supply controller is provided for providing a drive current to a control terminal of a power transistor in three time intervals. The controller includes control circuits configured to control the drive current in multiple stages. During a first time interval, first drive current includes a current spike for turning on the power transistor in response to a start of the control signal pulse. During a second time interval, a second drive current includes a ramping current substantially proportional to a magnitude of a current through the power transistor. During a third time interval, current flow to the power transistor is at least partially turned off before an end of the control signal pulse.
摘要翻译：提供电源控制器，用于以三个时间间隔向功率晶体管的控制端提供驱动电流。该控制器包括配置成控制多级驱动电流的控制电路。在第一时间间隔期间，第一驱动电流包括用于响应于控制信号脉冲的启动来接通功率晶体管的电流尖峰。在第二时间间隔期间，第二驱动电流包括基本上与通过功率晶体管的电流的大小成比例的斜坡电流。在第三时间间隔期间，在控制信号脉冲结束之前，至功率晶体管的电流至少部分截止。

19. 发明申请

US20120134182A1 CONTROL CIRCUITS AND METHODS FOR SWITCHING MODE POWER SUPPLIES 有权
标题翻译：用于切换模式电源的控制电路和方法
公开(公告)号：US20120134182A1
公开(公告)日：2012-05-31
申请号：US13364269
申请日：2012-02-01
申请人： YaJiang Zhu , Jia Xie , Yongbo Zhang , Chao Chen , Shuzhuang Lv
发明人： YaJiang Zhu , Jia Xie , Yongbo Zhang , Chao Chen , Shuzhuang Lv
IPC分类号： H02M3/335
CPC分类号： H02M3/33523
摘要： A switching mode power supply (SMPS) includes a transformer having a primary winding, a secondary winding for providing an output voltage, and an auxiliary winding. The SMPS also includes a power switch coupled to the primary winding. A first control circuit is coupled to the secondary winding, and is configured to provide a first electrical signal to the secondary winding when the output voltage of the SMPS is less than a reference voltage during a discontinuous time, whereupon a second electrical signal is induced in the auxiliary winding. A second control circuit is coupled to the auxiliary winding and the power switch. The second control circuit is configured to regulate the output of the SMPS by controlling the power switch in response to a feedback voltage signal from the auxiliary winding, and is further configured to turn on the power switch in response to the second electrical signal.
摘要翻译：开关模式电源（SMPS）包括具有初级绕组的变压器，用于提供输出电压的次级绕组和辅助绕组。 SMPS还包括耦合到初级绕组的电源开关。第一控制电路耦合到次级绕组，并且被配置为当在不连续时间期间SMPS的输出电压小于参考电压时，向次级绕组提供第一电信号，由此在第二电信号中引入第二电信号辅助绕组。第二控制电路耦合到辅助绕组和电源开关。第二控制电路被配置为通过响应于来自辅助绕组的反馈电压信号控制功率开关来调节SMPS的输出，并且还被配置为响应于第二电信号而接通功率开关。

20. 发明申请

US20120056551A1 HIGH POWER-FACTOR CONTROL CIRCUIT AND METHOD FOR SWITCHED MODE POWER SUPPLY 有权
标题翻译：高功率因数控制电路和开关电源的方法
公开(公告)号：US20120056551A1
公开(公告)日：2012-03-08
申请号：US13050236
申请日：2011-03-17
申请人： Shihai Zhu , Zeqiang Chen , Xuegang Ren , Yajiang Zhu
发明人： Shihai Zhu , Zeqiang Chen , Xuegang Ren , Yajiang Zhu
IPC分类号： H05B41/282
CPC分类号： H02M3/33507 , H02M1/4258 , H05B33/0815 , H05B33/0818 , Y02B20/347 , Y02B70/126
摘要： A switch mode power supply (SMPS) system includes a rectifying circuit for coupling to an AC input voltage and a transformer having a primary winding for coupling to the rectifying circuit and a secondary winding coupled to the primary winding. The system also has a power switch coupled to the primary winding and a control circuit coupled to the power switch. The control circuit is configured to control current flow in the primary winding such that an envelop waveform formed by peak points of current pulses are in phase with the magnitude of the AC input voltage. Moreover, the SMPS system is configured to provide a constant average output current.
摘要翻译：开关模式电源（SMPS）系统包括用于耦合到AC输入电压的整流电路和具有用于耦合到整流电路的初级绕组和耦合到初级绕组的次级绕组的变压器。该系统还具有耦合到初级绕组的功率开关和耦合到功率开关的控制电路。控制电路被配置为控制初级绕组中的电流流动，使得由电流脉冲的峰值点形成的包络波形与AC输入电压的大小相同。此外，SMPS系统被配置为提供恒定的平均输出电流。

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