公开(公告)号：US08923021B2

公开(公告)日：2014-12-30

申请号：US13338857

申请日：2011-12-28

申请人： Xuegang Ren ,  Jianhua Duan ,  Siyuan Xu ,  Na Liu ,  Zeqiang Chen

发明人： Xuegang Ren ,  Jianhua Duan ,  Siyuan Xu ,  Na Liu ,  Zeqiang Chen

IPC分类号： H02M3/335

CPC分类号： H02M1/36 ,  H02M3/33507 ,  H02M2001/0025

摘要： A switch-mode power supply (SMPS) includes a transformer having a primary winding coupled to a power switch, a secondary winding for providing an output of the power supply, and a controller. The controller includes a first input terminal for receiving a current sensing signal related to a current in the primary winding, a second input terminal for receiving a feedback signal related to a current in the secondary winding, and an output terminal for providing a control signal to turn on and off the power switch. When the feedback signal is higher than a first reference voltage, the controller is configured to cause the SMPS to maintain a constant output current at a first current magnitude. When the feedback signal is lower than the first reference voltage, the controller is configured to cause the SMPS to provide a second output current at a second current magnitude higher than the first current magnitude.

摘要翻译： 开关电源（SMPS）包括具有耦合到功率开关的初级绕组的变压器，用于提供电源的输出的次级绕组和控制器。 该控制器包括用于接收与初级绕组中的电流相关的电流感测信号的第一输入端子，用于接收与次级绕组中的电流有关的反馈信号的第二输入端，以及用于向第二输入端提供控制信号 打开和关闭电源开关。 当反馈信号高于第一参考电压时，控制器被配置为使得SMPS在第一电流幅度下保持恒定的输出电流。 当反馈信号低于第一参考电压时，控制器被配置为使得SMPS以比第一电流幅度高的第二电流幅度提供第二输出电流。

公开(公告)号：US08878448B2

公开(公告)日：2014-11-04

申请号：US13224325

申请日：2011-09-01

申请人： Jianhua Duan ,  Xuegang Ren ,  Na Liu

发明人： Jianhua Duan ,  Xuegang Ren ,  Na Liu

IPC分类号： H05B37/00 ,  H05B33/08

CPC分类号： H05B33/0851 ,  H05B33/0815 ,  H05B33/0818

摘要： A system for driving an LED (light-emitting diode) lamp includes a dimmer circuit coupled to a line input voltage for varying a magnitude of an input voltage and a transformer having a primary winding, a secondary winding, and one or more auxiliary windings, the primary winding coupled to the dimmer circuit. The system also includes an output rectifying circuit coupled to the secondary winding for providing an output current to the LED lamp and a power switch coupled to the primary winding for controlling a current flow in the primary winding. The system further includes a controller having a comparator and a capacitor for providing a control signal to control the power switch for regulating the output current. The controller coupled to the dimmer circuit for receiving an average input voltage signal from the dimmer circuit, wherein the control signal is characterized by a duty cycle that is determined by a ratio of a charging current to a discharging current of the capacitor, and the ratio is related to the average input voltage signal from the dimmer circuit.

摘要翻译： 用于驱动LED（发光二极管）灯的系统包括耦合到用于改变输入电压的大小的线路输入电压的调光器电路和具有初级绕组，次级绕组和一个或多个辅助绕组的变压器， 耦合到调光器电路的初级绕组。 该系统还包括耦合到次级绕组的输出整流电路，用于向LED灯提供输出电流，以及耦合到初级绕组的功率开关，用于控制初级绕组中的电流。 该系统还包括具有比较器和电容器的控制器，用于提供控制信号以控制用于调节输出电流的功率开关。 所述控制器耦合到所述调光器电路，用于接收来自所述调光器电路的平均输入电压信号，其中所述控制信号的特征在于由充电电流与所述电容器的放电电流的比率确定的占空比， 与来自调光电路的平均输入电压信号有关。

公开(公告)号：US20120056548A1

公开(公告)日：2012-03-08

申请号：US13224325

申请日：2011-09-01

申请人： Jianhua Duan ,  Xuegang Ren ,  Na Liu

发明人： Jianhua Duan ,  Xuegang Ren ,  Na Liu

IPC分类号： H05B37/02 ,  G05F5/00

CPC分类号： H05B33/0851 ,  H05B33/0815 ,  H05B33/0818

摘要： A system for driving an LED (light-emitting diode) lamp includes a dimmer circuit coupled to a line input voltage for varying a magnitude of an input voltage and a transformer having a primary winding, a secondary winding, and one or more auxiliary windings, the primary winding coupled to the dimmer circuit. The system also includes an output rectifying circuit coupled to the secondary winding for providing an output current to the LED lamp and a power switch coupled to the primary winding for controlling a current flow in the primary winding. The system further includes a controller having a comparator and a capacitor for providing a control signal to control the power switch for regulating the output current. The controller coupled to the dimmer circuit for receiving an average input voltage signal from the dimmer circuit, wherein the control signal is characterized by a duty cycle that is determined by a ratio of a charging current to a discharging current of the capacitor, and the ratio is related to the average input voltage signal from the dimmer circuit.

摘要翻译： 用于驱动LED（发光二极管）灯的系统包括耦合到用于改变输入电压的大小的线路输入电压的调光器电路和具有初级绕组，次级绕组和一个或多个辅助绕组的变压器， 耦合到调光器电路的初级绕组。 该系统还包括耦合到次级绕组的输出整流电路，用于向LED灯提供输出电流，以及耦合到初级绕组的功率开关，用于控制初级绕组中的电流。 该系统还包括具有比较器和电容器的控制器，用于提供控制信号以控制用于调节输出电流的功率开关。 所述控制器耦合到所述调光器电路，用于接收来自所述调光器电路的平均输入电压信号，其中所述控制信号的特征在于由充电电流与所述电容器的放电电流的比率确定的占空比， 与来自调光电路的平均输入电压信号有关。

公开(公告)号：US20130148387A1

公开(公告)日：2013-06-13

申请号：US13338857

申请日：2011-12-28

申请人： Xuegang Ren ,  Jianhua Duan ,  Siyuan Xu ,  Na Liu ,  Zeqiang Chen

发明人： Xuegang Ren ,  Jianhua Duan ,  Siyuan Xu ,  Na Liu ,  Zeqiang Chen

IPC分类号： H02M3/335

CPC分类号： H02M1/36 ,  H02M3/33507 ,  H02M2001/0025

摘要： A switch-mode power supply (SMPS) includes a transformer having a primary winding coupled to a power switch, a secondary winding for providing an output of the power supply, and a controller. The controller includes a first input terminal for receiving a current sensing signal related to a current in the primary winding, a second input terminal for receiving a feedback signal related to a current in the secondary winding, and an output terminal for providing a control signal to turn on and off the power switch. When the feedback signal is higher than a first reference voltage, the controller is configured to cause the SMPS to maintain a constant output current at a first current magnitude. When the feedback signal is lower than the first reference voltage, the controller is configured to cause the SMPS to provide a second output current at a second current magnitude higher than the first current magnitude.

摘要翻译： 开关电源（SMPS）包括具有耦合到功率开关的初级绕组的变压器，用于提供电源的输出的次级绕组和控制器。 该控制器包括用于接收与初级绕组中的电流相关的电流感测信号的第一输入端子，用于接收与次级绕组中的电流有关的反馈信号的第二输入端，以及用于向第二输入端提供控制信号 打开和关闭电源开关。 当反馈信号高于第一参考电压时，控制器被配置为使得SMPS在第一电流幅度下保持恒定的输出电流。 当反馈信号低于第一参考电压时，控制器被配置为使得SMPS以比第一电流幅度高的第二电流幅度提供第二输出电流。

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。

公开(公告)号：US20110122659A1

公开(公告)日：2011-05-26

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： H02M3/335 ,  G05F1/10

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。