公开(公告)号：US20150286230A1

公开(公告)日：2015-10-08

申请号：US14244746

申请日：2014-04-03

Applicant: MICROCHIP TECHNOLOGY INC.

Inventor： Scott Lynch

IPC: G05F1/56

CPC classification number: H05B33/0845 ,  G05F1/56 ,  H05B33/0815 ,  H05B33/0824 ,  H05B33/083 ,  Y02B20/345

Abstract: Employed within an LED driver operating from the AC power line, the invention controls both input current and output power. With this regulation circuit, input current appears purely resistive, precisely tracking the input voltage waveshape. At the same time, it provides good line regulation and inherent phase dimmer compatibility, requiring no special circuitry to detect and handle a dimmer.

Abstract translation: 在由AC电源线工作的LED驱动器内部使用，本发明控制输入电流和输出功率。 采用这种调节电路，输入电流纯电阻，精确跟踪输入电压波形。 同时，它提供良好的线路调节和固有的相位调光器兼容性，不需要专门的电路来检测和处理调光器。

公开(公告)号：US20150216004A1

公开(公告)日：2015-07-30

申请号：US14680010

申请日：2015-04-06

Applicant: Microchip Technology Inc.

Inventor： Scott Lynch ,  Benedict C.K. Choy

IPC: H05B33/08

CPC classification number: H05B33/0812 ,  H05B33/0815 ,  H05B33/0818 ,  H05B33/0827 ,  H05B33/083 ,  H05B33/0845 ,  Y02B20/347

Abstract: An LED driver circuit for controlling direct current supplied to a plurality of serially connected segments of Light Emitting Diodes (LEDs) is disclosed. In one embodiment, the LED driver circuit comprises a self-commutating circuit, which comprises a plurality of current control elements, each current control element having two ends, a first end connected to a different end of each segment along the plurality of serially connected segments of LEDs and a second end connected to a path to ground. The path to ground comprises a sense resistor and the path to ground is shared by the second end of each current control element. Each current control element is coupled to an adjacent current control element by a cross-regulation circuit and controlled by a signal from an adjacent current control element.

Abstract translation: 公开了一种用于控制提供给发光二极管（LED）的多个串联连接的段的直流电的LED驱动电路。 在一个实施例中，LED驱动器电路包括自整流电路，其包括多个电流控制元件，每个电流控制元件具有两端，第一端连接到沿着多个串联连接的段的每个段的不同端 的LED和连接到地面的路径的第二端。 到地的路径包括检测电阻器，并且到每个电流控制元件的第二端共享地面的路径。 每个电流控制元件通过交叉调节电路耦合到相邻电流控制元件，并由来自相邻电流控制元件的信号控制。