Temperature foldback circuit for LED load control by constant current source

Invention Grant

US09131567B2 Temperature foldback circuit for LED load control by constant current source 有权

Title translation: 恒流源LED负载控制温度折返电路

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Patent Title: Temperature foldback circuit for LED load control by constant current source
Patent Title (中): 恒流源LED负载控制温度折返电路
Application No.: US14050284

Application Date: 2013-10-09
Publication No.: US09131567B2

Publication Date: 2015-09-08
Inventor: Wanfeng Zhang
Applicant: Marvell World Trade Ltd.
Applicant Address: BB St. Michael
Assignee: MARVELL WORLD TRADE LTD.
Current Assignee: MARVELL WORLD TRADE LTD.
Current Assignee Address: BB St. Michael
Main IPC: H05B37/00
IPC: H05B37/00 ; H05B41/00 ; H05B33/08

Temperature foldback circuit for LED load control by constant current source

Abstract:

An apparatus includes an input node, a light-emitting diode (LED) string to receive a current from the input node, a voltage divider to output a control voltage, and a switch to receive the control voltage. The switch coupled to the LED string controls the current through the LED string according to the control voltage.

Abstract(Chinese):

一种装置包括输入节点，用于从输入节点接收电流的发光二极管（LED）串，用于输出控制电压的分压器和用于接收控制电压的开关。耦合到LED串的开关根据控制电压来控制通过LED串的电流。

Public/Granted literature

US20140111090A1 TEMPERATURE FOLDBACK CIRCUIT FOR LED LOAD CONTROL BY CONSTANT CURRENT SOURCE Public/Granted day:2014-04-24

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