公开(公告)号：US20150373790A1

公开(公告)日：2015-12-24

申请号：US14722972

申请日：2015-05-27

Applicant: NXP B.V.

Inventor： Hendrik Boswinkel ,  Leendert van den Broeke

IPC: H05B33/08 ,  H05B37/02

CPC classification number: H05B33/083 ,  H05B33/0827 ,  H05B33/0845 ,  H05B33/0857 ,  H05B33/086 ,  H05B37/0272

Abstract: A circuit and lighting unit for dimmable lighting applications are disclosed, the circuit comprising: a controllable current supply having a positive output and a negative output and being for supplying current to at most one of a first path and a second path, the first and second path each comprising, in use, a series arrangement of a switch and an LED string; the switches each having a respective input, output, and control terminal, the respective inputs being connected in common to a one of the outputs of the controllable current supply, and an open/closed switching status of each switch being selectable by a respective switching signal at its respective control terminal; wherein the second path switch control terminal is electrically coupled to the first path switch output such that the second switching signal is inverted relative to the first switching signal.

Abstract translation: 公开了一种用于可调光照明应用的电路和照明单元，该电路包括：具有正输出和负输出的可控电流源，用于向第一路径和第二路径中的至少一个提供电流，第一和第二 在使用中，每个路径包括开关和LED串的串联布置; 开关各自具有相应的输入，输出和控制端子，各个输入端共同连接到可控电流源的输出之一，每个开关的开/关开关状态可由相应的开关信号选择 在其各自的控制终端; 其中所述第二路径开关控制端子电耦合到所述第一路径开关输出，使得所述第二开关信号相对于所述第一开关信号反相。