公开(公告)号：US09287798B2

公开(公告)日：2016-03-15

申请号：US13706502

申请日：2012-12-06

Applicant: STMicroelectronics, Inc.

Inventor： Thomas Stamm

IPC: H02M3/335 ,  H02M7/217 ,  H05B33/08

CPC classification number: H02M3/33515 ,  H02M1/42 ,  H02M7/217 ,  H05B33/0815 ,  Y02B20/347

Abstract: A fly-back type switched current regulator includes a primary transformer winding coupled to receive a rectified DC signal derived from an AC signal. The drain of a power transistor is coupled to the primary winding, with the source of the power transistor coupled to an input of a comparison circuit and a primary transformer winding sense resistor. A control terminal of the power transistor is coupled to an output of the comparison circuit. A capacitor stores a variable reference signal for application at a first capacitor terminal to another input of the differential circuit. The variable reference signal is compared to a winding current signal generated by the sense resistor by the comparison circuit. An injection circuit applies an AC signal derived from the rectified DC signal to a second terminal of the capacitor so as to modulate the stored variable reference signal. The regulator is coupled to drive LEDs.

Abstract translation: 回扫式开关电流调节器包括耦合以接收从AC信号导出的整流DC信号的初级变压器绕组。 功率晶体管的漏极耦合到初级绕组，功率晶体管的源极耦合到比较电路的输入端和初级变压器绕组检测电阻器。 功率晶体管的控制端耦合到比较电路的输出端。 电容器存储用于在第一电容器端子处施加到差分电路的另一输入端的可变参考信号。 可变参考信号与由比较电路由检测电阻器产生的绕组电流信号进行比较。 注入电路将从整流后的直流信号得到的交流信号施加到电容器的第二端，以便调制存储的可变参考信号。 调节器耦合到驱动LED。

公开(公告)号：US09204505B2

公开(公告)日：2015-12-01

申请号：US14226316

申请日：2014-03-26

Applicant: STMicroelectronics, Inc.

Inventor： Thomas Stamm ,  Jianwen Shao

IPC: H05B37/02 ,  H05B33/08

CPC classification number: H05B33/0815 ,  H05B33/0824 ,  H05B33/0845 ,  H05B33/0887 ,  Y02B20/341 ,  Y02B20/347

Abstract: An AC/DC power converter is coupled between a fluorescent ballast circuit and a set of light emitting diodes (LEDs) forming an LED lamp. The power converter converts an AC output from the ballast circuit to a DC current applied to drive operation of the LEDs. The power converter transforms and rectifies the AC output from the ballast circuit to generate a DC output current. An open load protection circuit is coupled to protect the ballast circuit when the LED lamp is not connected. Current control is provided by a transistor having a source/drain conduction path coupled to shunt the DC output current in response to a control signal having a duty cycle generated as a function of a zero-crossing of the AC output and a sensed value of the DC output current applied to the LED lamp.

Abstract translation: AC / DC电力转换器耦合在荧光镇流器电路和形成LED灯的一组发光二极管（LED）之间。 功率转换器将镇流器电路的AC输出转换为驱动LED驱动的直流电流。 电源转换器对镇流器电路的交流输出进行变换和整流，以产生直流输出电流。 当LED灯未连接时，开路负载保护电路被连接以保护镇流器电路。 电流控制由具有源极/漏极导电路径的晶体管提供，该晶体管具有耦合以分流直流输出电流的响应于具有作为AC输出的过零点的函数产生的占空比的控制信号，以及 直流输出电流施加到LED灯。

公开(公告)号：US20140320007A1

公开(公告)日：2014-10-30

申请号：US14226316

申请日：2014-03-26

Applicant: STMicroelectronics, Inc.

Inventor： Thomas Stamm ,  Jianwen Shao

IPC: H05B33/08

CPC classification number: H05B33/0815 ,  H05B33/0824 ,  H05B33/0845 ,  H05B33/0887 ,  Y02B20/341 ,  Y02B20/347

Abstract: An AC/DC power converter is coupled between a fluorescent ballast circuit and a set of light emitting diodes (LEDs) forming an LED lamp. The power converter converts an AC output from the ballast circuit to a DC current applied to drive operation of the LEDs. The power converter transforms and rectifies the AC output from the ballast circuit to generate a DC output current. An open load protection circuit is coupled to protect the ballast circuit when the LED lamp is not connected. Current control is provided by a transistor having a source/drain conduction path coupled to shunt the DC output current in response to a control signal having a duty cycle generated as a function of a zero-crossing of the AC output and a sensed value of the DC output current applied to the LED lamp.

Abstract translation: AC / DC电力转换器耦合在荧光镇流器电路和形成LED灯的一组发光二极管（LED）之间。 功率转换器将镇流器电路的AC输出转换为驱动LED驱动的直流电流。 电源转换器对镇流器电路的交流输出进行变换和整流，以产生直流输出电流。 当LED灯未连接时，开路负载保护电路被连接以保护镇流器电路。 电流控制由具有源极/漏极导电路径的晶体管提供，该晶体管具有耦合以分流直流输出电流的响应于具有作为AC输出的过零点的函数产生的占空比的控制信号，以及 直流输出电流施加到LED灯。

公开(公告)号：US20160149500A1

公开(公告)日：2016-05-26

申请号：US15011854

申请日：2016-02-01

Applicant: STMicroelectronics, Inc.

Inventor： Thomas Stamm

IPC: H02M3/335 ,  H05B33/08 ,  H02M1/42

CPC classification number: H02M3/33515 ,  H02M1/42 ,  H02M7/217 ,  H05B33/0815 ,  Y02B20/347

Abstract: A fly-back type switched current regulator includes a primary transformer winding coupled to receive a rectified DC signal derived from an AC signal. The drain of a power transistor is coupled to the primary winding, with the source of the power transistor coupled to an input of a comparison circuit and a primary transformer winding sense resistor. A control terminal of the power transistor is coupled to an output of the comparison circuit. A capacitor stores a variable reference signal for application at a first capacitor terminal to another input of the differential circuit. The variable reference signal is compared to a winding current signal generated by the sense resistor by the comparison circuit. An injection circuit applies an AC signal derived from the rectified DC signal to a second terminal of the capacitor so as to modulate the stored variable reference signal. The regulator is coupled to drive LEDs.

Abstract translation: 回扫式开关电流调节器包括耦合以接收从AC信号导出的整流DC信号的初级变压器绕组。 功率晶体管的漏极耦合到初级绕组，功率晶体管的源极耦合到比较电路的输入端和初级变压器绕组检测电阻器。 功率晶体管的控制端耦合到比较电路的输出端。 电容器存储用于在第一电容器端子处施加到差分电路的另一输入端的可变参考信号。 可变参考信号与由比较电路由检测电阻器产生的绕组电流信号进行比较。 注入电路将从整流后的直流信号得到的交流信号施加到电容器的第二端，以便调制存储的可变参考信号。 调节器耦合到驱动LED。

公开(公告)号：US09866124B2

公开(公告)日：2018-01-09

申请号：US15011854

申请日：2016-02-01

Applicant: STMicroelectronics, Inc.

Inventor： Thomas Stamm

IPC: H02M3/335 ,  H02M3/325 ,  H02M1/00 ,  H02M7/217 ,  H05B33/08 ,  H02M1/42

CPC classification number: H02M3/33515 ,  H02M1/42 ,  H02M7/217 ,  H05B33/0815 ,  Y02B20/347

Abstract: A fly-back type switched current regulator includes a primary transformer winding coupled to receive a rectified DC signal derived from an AC signal. The drain of a power transistor is coupled to the primary winding, with the source of the power transistor coupled to an input of a comparison circuit and a primary transformer winding sense resistor. A control terminal of the power transistor is coupled to an output of the comparison circuit. A capacitor stores a variable reference signal for application at a first capacitor terminal to another input of the differential circuit. The variable reference signal is compared to a winding current signal generated by the sense resistor by the comparison circuit. An injection circuit applies an AC signal derived from the rectified DC signal to a second terminal of the capacitor so as to modulate the stored variable reference signal. The regulator is coupled to drive LEDs.

公开(公告)号：US20140160801A1

公开(公告)日：2014-06-12

申请号：US13706502

申请日：2012-12-06

Applicant: STMICROELECTRONICS, INC.

Inventor： Thomas Stamm

IPC: H02M7/217

CPC classification number: H02M3/33515 ,  H02M1/42 ,  H02M7/217 ,  H05B33/0815 ,  Y02B20/347

Abstract: A fly-back type switched current regulator includes a primary transformer winding coupled to receive a rectified DC signal derived from an AC signal. The drain of a power transistor is coupled to the primary winding, with the source of the power transistor coupled to an input of a comparison circuit and a primary transformer winding sense resistor. A control terminal of the power transistor is coupled to an output of the comparison circuit. A capacitor stores a variable reference signal for application at a first capacitor terminal to another input of the differential circuit. The variable reference signal is compared to a winding current signal generated by the sense resistor by the comparison circuit. An injection circuit applies an AC signal derived from the rectified DC signal to a second terminal of the capacitor so as to modulate the stored variable reference signal. The regulator is coupled to drive LEDs.

Abstract translation: 回扫式开关电流调节器包括耦合以接收从AC信号导出的整流DC信号的初级变压器绕组。 功率晶体管的漏极耦合到初级绕组，功率晶体管的源极耦合到比较电路的输入端和初级变压器绕组检测电阻器。 功率晶体管的控制端耦合到比较电路的输出端。 电容器存储用于在第一电容器端子处施加到差分电路的另一输入端的可变参考信号。 可变参考信号与由比较电路由检测电阻器产生的绕组电流信号进行比较。 注入电路将从整流后的直流信号得到的交流信号施加到电容器的第二端，以便调制存储的可变参考信号。 调节器耦合到驱动LED。