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[原创]Maxim MAX25605汽车照明六开关序列LED控制方案

关键词:电源管理 LED驱动器 汽车电子 Maxim MAX25605

时间:2020-11-24 14:07:50       来源:中电网

Maxim公司的MAX25605是六路汽车顺序LED控制器,可以在不用微控制器或软件的情况下顺序开启功能或任何其它顺序照明激活.MAX25605集成了六个级联低RDSON的N沟MOSFET,适用于高达750mA的LED照明应用.每个开关支持高达三个串联LED/开关.整个LED串电压支持高达60V,N沟MOSFET分成两组,每组三个,使得单个器件能顺序一个或两个LED串.集成的栅极驱动器和电平转移用于每个开关,它由内部电荷泵稳压器,支持降压-升压和升压到电池应用.顺序功能和时序由连接电阻到A0,A1,A2和CLK输入进行编程.编程选择包括调光上/下,短路LED阈值,多个器件顺序位置,调光频率和变暗周期.选择算法变暗特性允许逐渐打开LED或关断LED.汽车级质量,满足AEC-Q100资质,工作温度-40C 到 +125C,主要用在顺序开关信号照明和基于硬件的照明激活.本文介绍了MAX25605主要优势和特性,简化框图和框图,多种应用电路以及评估板MAX25605 EVK主要优势和特性,框图,电路图和材料清单与PCB设计图.

 

 The MAX25605 is a six-channel automotive sequential LED controller. The device implements a sequential turn function or any other sequential light animation without the use of a microcontroller or software. The MAX25605 in­tegrates six cascoded low RDSON n-channel MOSFETs suitable for LED lighting applications up to 750mA. Each switch supports up to three series LEDs per switch. The entire LED string voltage supported is up to 60V. The n-channel MOSFETs are divided into two groups of three, allowing a single device to sequence either one or two strings of LEDs. Integrated gate drivers and level shifters for the switches are supplied by an internal charge-pump regulator, supporting buck-bo..

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