公开(公告)号：US09642200B2

公开(公告)日：2017-05-02

申请号：US15147834

申请日：2016-05-05

Applicant: LINEAR TECHNOLOGY CORPORATION

Inventor： Joshua William Caldwell ,  Dongwon Kwon ,  Lucas Andrew Milner

IPC: H05B37/00 ,  H05B33/08

CPC classification number: H05B33/0842 ,  H05B33/0815

Abstract: A method and system of driving an LED load. There is a power stage that is configured to deliver a level of current indicated by a control signal to the LED load when a PWM signal is ON and stop delivering the level of current when the PWM signal is OFF. There is a feedback circuit that is configured to generate the operating point signal, which causes the power stage to deliver a level of current indicated by the control signal, when the PWM signal is ON. A store and hold circuit is configured to store an information indicative of a level of the operating point signal just after the PWM signal is turned OFF and cause the operating point signal to be at that level just before the PWM signal is turned ON.

公开(公告)号：US20160353532A1

公开(公告)日：2016-12-01

申请号：US15147842

申请日：2016-05-05

Applicant: LINEAR TECHNOLOGY CORPORATION

Inventor： Joshua William Caldwell ,  Dongwon Kwon ,  Lucas Andrew Milner

IPC: H05B33/08

CPC classification number: H05B33/0815 ,  H02M3/04 ,  H02M3/156 ,  H02M3/3376 ,  H02M2001/0012 ,  H02M2001/0025 ,  H02M2001/0045 ,  H02M2001/0096 ,  H05B33/0812 ,  H05B33/0845 ,  H05B33/0857

Abstract: A method and system of driving an LED load. A driver is configured to deliver a level of current indicated by a control signal to the LED load when a PWM signal is ON and stop delivering the level of current when the PWM signal is OFF. An output capacitance element is coupled across a differential output of the LED driver. A feedback path, having a store circuit, is configured to store an information indicative of a first voltage level across the output capacitance element as a stored feedback reference signal just after the PWM signal is turned OFF. The feedback path causes the voltage across the output capacitance element to be at the first voltage level just before the PWM signal is turned ON.

Abstract translation: 驱动LED负载的方法和系统。 驱动器被配置为当PWM信号为ON时将控制信号指示的电流电平传递给LED负载，并且当PWM信号为OFF时停止传送电流电平。 输出电容元件跨越LED驱动器的差分输出耦合。 具有存储电路的反馈路径被配置为在PWM信号关闭之后存储指示输出电容元件上的第一电压电平的信息作为存储的反馈参考信号。 反馈路径使得输出电容元件两端的电压在PWM信号接通之前处于第一电压电平。

公开(公告)号：US09596728B2

公开(公告)日：2017-03-14

申请号：US15147842

申请日：2016-05-05

Applicant: LINEAR TECHNOLOGY CORPORATION

Inventor： Joshua William Caldwell ,  Dongwon Kwon ,  Lucas Andrew Milner

IPC: H05B33/08 ,  H02M3/156 ,  H02M3/337

CPC classification number: H05B33/0815 ,  H02M3/04 ,  H02M3/156 ,  H02M3/3376 ,  H02M2001/0012 ,  H02M2001/0025 ,  H02M2001/0045 ,  H02M2001/0096 ,  H05B33/0812 ,  H05B33/0845 ,  H05B33/0857

Abstract: A method and system of driving an LED load. A driver is configured to deliver a level of current indicated by a control signal to the LED load when a PWM signal is ON and stop delivering the level of current when the PWM signal is OFF. An output capacitance element is coupled across a differential output of the LED driver. A feedback path, having a store circuit, is configured to store an information indicative of a first voltage level across the output capacitance element as a stored feedback reference signal just after the PWM signal is turned OFF. The feedback path causes the voltage across the output capacitance element to be at the first voltage level just before the PWM signal is turned ON.

Abstract translation: 驱动LED负载的方法和系统。 驱动器被配置为当PWM信号为ON时将控制信号指示的电流电平传递给LED负载，并且当PWM信号为OFF时停止传送电流电平。 输出电容元件跨越LED驱动器的差分输出耦合。 具有存储电路的反馈路径被配置为在PWM信号关闭之后存储指示输出电容元件上的第一电压电平的信息作为存储的反馈参考信号。 反馈路径使得输出电容元件两端的电压在PWM信号接通之前处于第一电压电平。

公开(公告)号：US20160353537A1

公开(公告)日：2016-12-01

申请号：US15147834

申请日：2016-05-05

Applicant: LINEAR TECHNOLOGY CORPORATION

Inventor： Joshua William Caldwell ,  Dongwon Kwon ,  Lucas Andrew Milner

IPC: H05B33/08

CPC classification number: H05B33/0842 ,  H05B33/0815

Abstract: A method and system of driving an LED load. There is a power stage that is configured to deliver a level of current indicated by a control signal to the LED load when a PWM signal is ON and stop delivering the level of current when the PWM signal is OFF. There is a feedback circuit that is configured to generate the operating point signal, which causes the power stage to deliver a level of current indicated by the control signal, when the PWM signal is ON. A store and hold circuit is configured to store an information indicative of a level of the operating point signal just after the PWM signal is turned OFF and cause the operating point signal to be at that level just before the PWM signal is turned ON.

Abstract translation: 驱动LED负载的方法和系统。 功率级被配置为当PWM信号为ON时将控制信号所指示的电流电平传递给LED负载，并且当PWM信号为OFF时停止提供电流电平。 有一个反馈电路被配置为产生工作点信号，当PWM信号为ON时，该反馈电路使得功率级提供由控制信号指示的电平。 存储和保持电路被配置为在PWM信号关闭之后存储指示操作点信号的电平的信息，并且在PWM信号接通之前使工作点信号处于该电平。