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1. 发明申请

US20100259952A1 SWITCHING MODE POWER SUPPLY CONTROLLER WITH HIGH VOLTAGE STARTUP CIRCUITS 有权
标题翻译：具有高电压启动电路的开关电源控制器
公开(公告)号：US20100259952A1
公开(公告)日：2010-10-14
申请号：US12421461
申请日：2009-04-09
申请人： Yajiang Zhu , Zheng Ying , Xianfeng Liu , Yanping Wang
发明人： Yajiang Zhu , Zheng Ying , Xianfeng Liu , Yanping Wang
IPC分类号： H02M3/335
CPC分类号： H02M1/36
摘要： A controller for a switching mode power supply includes two semiconductor chips. The first semiconductor chip has a high-voltage startup transistor coupled to a high-voltage supply input terminal and configured to provide a charging current in a startup phase or protection mode of a switching mode power supply (SMPS) and to provide substantially no current in a normal operation phase of the SMPS. The second semiconductor chip has a control circuit for controlling the switching mode power supply. The second semiconductor chip also has first and second on-chip high-voltage resistors coupled to the high-voltage supply input terminal and the high-voltage startup transistor in the first semiconductor chip. The first and the second on-chip high-voltage resistors are configured to provide a voltage and a current related to a voltage at the high-voltage supply input terminal.
摘要翻译：开关电源的控制器包括两个半导体芯片。第一半导体芯片具有耦合到高电压电源输入端子的高电压启动晶体管，并被配置为在开关模式电源（SMPS）的启动阶段或保护模式下提供充电电流，并且基本上不提供电流 SMPS的正常运行阶段。第二半导体芯片具有用于控制开关模式电源的控制电路。第二半导体芯片还具有耦合到第一半导体芯片中的高压电源输入端子和高压启动晶体管的第一和第二片上高压电阻器。第一和第二片上高压电阻器被配置为提供与高压电源输入端子处的电压相关的电压和电流。

2. 发明授权

US08045348B2 Switching mode power supply controller with high voltage startup circuits 有权
标题翻译：具有高压启动电路的开关电源控制器
公开(公告)号：US08045348B2
公开(公告)日：2011-10-25
申请号：US12421461
申请日：2009-04-09
申请人： Yajiang Zhu , Zheng Ying , Xianfeng Liu , Yanping Wang
发明人： Yajiang Zhu , Zheng Ying , Xianfeng Liu , Yanping Wang
IPC分类号： H02M1/00
CPC分类号： H02M1/36
摘要： A controller for a switching mode power supply includes two semiconductor chips. The first semiconductor chip has a high-voltage startup transistor coupled to a high voltage supply input terminal and configured to provide a charging current in a startup phase or protection mode of a switching mode power supply (SMPS) and to provide substantially no current in a normal operation phase of the SMPS. The second semiconductor chip has a control circuit for controlling the switching mode power supply. The second semiconductor chip also has first and second on-chip high-voltage resistors coupled to the high-voltage supply input terminal and the high-voltage startup transistor in the first semiconductor chip. The first and the second on-chip high-voltage resistors are configured to provide a voltage and a current related to a voltage at the high-voltage supply input terminal.
摘要翻译：开关电源的控制器包括两个半导体芯片。第一半导体芯片具有耦合到高电压电源输入端的高电压启动晶体管，并被配置为在开关模式电源（SMPS）的启动阶段或保护模式下提供充电电流，并且基本上不提供电流正常运行阶段的SMPS。第二半导体芯片具有用于控制开关模式电源的控制电路。第二半导体芯片还具有耦合到第一半导体芯片中的高压电源输入端子和高压启动晶体管的第一和第二片上高压电阻器。第一和第二片上高压电阻器被配置为提供与高压电源输入端子处的电压相关的电压和电流。

3. 发明申请

US20140239930A1 CONSTANT-VOLTAGE AND CONSTANT-CURRENT BUCK CONVERTER AND CONTROL CIRCUIT 有权
标题翻译：恒定电流和恒定电流转换器和控制电路
公开(公告)号：US20140239930A1
公开(公告)日：2014-08-28
申请号：US14033341
申请日：2013-09-20
申请人： Hu Wang , Yajiang Zhu , Ruixia Fei , Shuzhuang Lv
发明人： Hu Wang , Yajiang Zhu , Ruixia Fei , Shuzhuang Lv
IPC分类号： H02M3/10
CPC分类号： H02M3/156 , H02M1/08 , H02M3/10 , H02M7/2176 , H02M2001/0009 , H02M2001/0022
摘要： A control circuit is provided for a buck converter that includes at least an inductor coupled to an output of the buck converter. The control circuit includes a power switch configured for coupling to a line voltage and configured for charging the inductor, an input line voltage sampling circuit, and a constant-voltage (CV) and constant-current (CC) control module coupled to the power switch. During a charging period of the inductor, the CV and CC control module is configured to control the power switch to provide a constant output current by maintaining a constant peak inductor current, even when the input line voltage changes. During a discharging period of the inductor, the CV and CC control module is configured to monitor the sensed output voltage to control the power switch to provide a constant output voltage.
摘要翻译：提供了一种用于降压转换器的控制电路，其包括耦合到降压转换器的输出的至少一个电感器。控制电路包括被配置为耦合到线路电压并被配置为对电感器充电的电源开关，输入线电压采样电路和耦合到电源开关的恒压（CV）和恒流（CC）控制模块。在电感器的充电期间，CV和CC控制模块配置为通过保持恒定的峰值电感电流来控制电源开关以提供恒定的输出电流，即使输入线路电压发生变化。在电感器的放电期间，CV和CC控制模块被配置为监视感测的输出电压，以控制电源开关以提供恒定的输出电压。

4. 发明授权

US08792258B2 Method and apparatus for reducing standby power of switching mode power supplies 有权
标题翻译：降低开关电源待机功率的方法和装置
公开(公告)号：US08792258B2
公开(公告)日：2014-07-29
申请号：US12248665
申请日：2008-10-09
申请人： Yajiang Zhu , Ruixia Fei , Wenhui Dong , Shaohua Fang
发明人： Yajiang Zhu , Ruixia Fei , Wenhui Dong , Shaohua Fang
IPC分类号： H02M3/335 , H02M3/338
CPC分类号： H02M3/33507 , H02M2001/0032 , Y02B70/16
摘要： An apparatus for coupling a switching mode power supply (SMPS) controller to a rectified line voltage. The apparatus includes a high-voltage startup transistor configured to provide a charging current during a startup phase of the SMPS controller and to provide substantially no current during a normal operation phase of the SMPS controller. A switch coupled to the high-voltage startup transistor. The switch receives a control signal from the SMPS controller, for turning off the switch during the startup phase and turning on the switch during the normal operation phase. A biasing device is connected in series with the switch and maintains the startup transistor in an off state when the SMPS controller is in the normal operation phase. A standby current in the apparatus is substantially lower when the SMPS controller is in the normal operation phase than the charging current in the apparatus when the SMPS is in the startup phase.
摘要翻译：一种用于将开关模式电源（SMPS）控制器耦合到整流线路电压的装置。该装置包括高压启动晶体管，其被配置为在SMPS控制器的启动阶段期间提供充电电流，并且在SMPS控制器的正常操作阶段期间基本上不提供电流。一个开关，耦合到高电压启动晶体管。开关从SMPS控制器接收控制信号，在启动阶段关闭开关，并在正常运行阶段打开开关。当SMPS控制器处于正常工作阶段时，偏置装置与开关串联连接，并将启动晶体管保持在断开状态。当SMPS处于启动阶段时，当SMPS控制器处于正常操作阶段时，装置中的备用电流大大低于装置中的充电电流。

5. 发明授权

US09356508B2 Constant-voltage and constant-current buck converter and control circuit 有权
标题翻译：恒压恒流降压转换器和控制电路
公开(公告)号：US09356508B2
公开(公告)日：2016-05-31
申请号：US14033341
申请日：2013-09-20
申请人： Hu Wang , Yajiang Zhu , Ruixia Fei , Shuzhuang Lv
发明人： Hu Wang , Yajiang Zhu , Ruixia Fei , Shuzhuang Lv
IPC分类号： G05F1/56 , G05F3/06 , H02M7/66 , H02M3/10 , H02M3/156 , H02M7/217 , H02M1/00
CPC分类号： H02M3/156 , H02M1/08 , H02M3/10 , H02M7/2176 , H02M2001/0009 , H02M2001/0022
摘要： A control circuit is provided for a buck converter that includes at least an inductor coupled to an output of the buck converter. The control circuit includes a power switch configured for coupling to a line voltage and configured for charging the inductor, an input line voltage sampling circuit, and a constant-voltage (CV) and constant-current (CC) control module coupled to the power switch. During a charging period of the inductor, the CV and CC control module is configured to control the power switch to provide a constant output current by maintaining a constant peak inductor current, even when the input line voltage changes. During a discharging period of the inductor, the CV and CC control module is configured to monitor the sensed output voltage to control the power switch to provide a constant output voltage.
摘要翻译：提供了一种用于降压转换器的控制电路，其包括耦合到降压转换器的输出的至少一个电感器。控制电路包括被配置为耦合到线路电压并被配置为对电感器充电的电源开关，输入线电压采样电路和耦合到电源开关的恒压（CV）和恒流（CC）控制模块。在电感器的充电期间，CV和CC控制模块配置为通过保持恒定的峰值电感电流来控制电源开关以提供恒定的输出电流，即使输入线路电压发生变化。在电感器的放电期间，CV和CC控制模块被配置为监视感测的输出电压，以控制电源开关以提供恒定的输出电压。

6. 发明授权

US08964415B2 Circuits and methods for increasing power factor of switch mode power supply 有权
标题翻译：提高开关电源功率因数的电路和方法
公开(公告)号：US08964415B2
公开(公告)日：2015-02-24
申请号：US13610790
申请日：2012-09-11
申请人： Yajiang Zhu , Na Liu , Siyuan Xu
发明人： Yajiang Zhu , Na Liu , Siyuan Xu
IPC分类号： H02M3/335
CPC分类号： H02M1/4258 , Y02B70/126
摘要： A switching mode power supply (SMPS) includes a rectifying device configured for converting a periodically varying input AC (alternating current) voltage into a DC (direct current) voltage, and a transformer including a primary winding, a secondary winding, and an auxiliary winding. The primary winding is coupled to the rectifying device. An input capacitor is coupled to the rectifying device and the primary winding of the transformer. A first power switch is coupled to the input capacitor. A control circuit is coupled to the first power switch and is configured to control the first power switch based on a phase or amplitude of the input AC voltage. By controlling the charging and discharging of the input capacitor, power is provided to the primary winding during a longer portion of the AC input voltage cycle, allowing the rectifier device to have a larger conduction angle to increase a power factor (PF).
摘要翻译：开关模式电源（SMPS）包括被配置为将周期性变化的输入AC（交流）电压转换为DC（直流）电压的整流装置，以及包括初级绕组，次级绕组和辅助绕组。初级绕组耦合到整流装置。输入电容器耦合到整流装置和变压器的初级绕组。第一电源开关耦合到输入电容器。控制电路耦合到第一电源开关，并且被配置为基于输入AC电压的相位或幅度来控制第一功率开关。通过控制输入电容器的充电和放电，在交流输入电压周期的较长部分期间向初级绕组提供功率，允许整流器件具有较大的导通角以增加功率因数（PF）。

7. 发明授权

US08897039B2 Method and system for pulse frequency modulated switching mode power supplies 有权
标题翻译：脉冲调制开关电源的方法和系统
公开(公告)号：US08897039B2
公开(公告)日：2014-11-25
申请号：US12136760
申请日：2008-06-10
申请人： Yajiang Zhu , Tao Peng , Ruixia Fei , Shaohua Fang
发明人： Yajiang Zhu , Tao Peng , Ruixia Fei , Shaohua Fang
IPC分类号： H02M3/335 , H02M1/44 , H03K7/06 , H03K5/1532 , H03K17/16
CPC分类号： H02M3/33523 , H02M1/44 , H03K5/1532 , H03K7/06 , H03K17/16
摘要： A pulse frequency modulation (PFM) controller for controlling a switching mode power supply. The controller includes an output terminal for providing a control signal to turn on and off a current in the power supply to regulate an output of the power supply. A first input terminal receives a feedback signal related to the output of the power supply, the feedback signal exhibiting a ringing waveform when the current in the power supply is turned off. The controller also includes a control circuit configured to provide the control signal in response to the feedback signal. The control signal is adapted to turn on the current in the power supply when the feedback signal is substantially at a valley of the ringing waveform of the feedback signal. In an embodiment, such a PFM controller can reduce turn-on transition loss in a power supply and provides frequency dithering to reduce electromagnetic interference.
摘要翻译：用于控制开关模式电源的脉冲频率调制（PFM）控制器。该控制器包括输出端子，用于提供控制信号以接通和关断电源中的电流以调节电源的输出。第一输入端子接收与电源的输出相关的反馈信号，当电源中的电流关闭时，反馈信号呈现振铃波形。该控制器还包括控制电路，该控制电路被配置为响应于反馈信号提供控制信号。当反馈信号基本上处于反馈信号的振铃波形的谷谷时，控制信号适于接通电源中的电流。在一个实施例中，这样的PFM控制器可以减少电源中的导通过渡损耗并提供频率抖动以减少电磁干扰。

8. 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。

9. 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。

10. 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。

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