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[原创] Maxim MAX25611汽车高压HB-LED控制器解决方案

关键词:电源管理 汽车电子 HB-LED驱动器 MAX25611A/MAX25611B

时间:2019-06-19 11:41:34       来源:中电网

Maxim公司的MAX25611A/MAX25611B是单路HBLED驱动器,主要用在汽车前端照明如远光,近光,日间行车灯(DRL),转向指示灯,雾灯和其它LED照明.输入电压5V-36V,最大输出电压65V,可以驱动一串LED灯.PWM输入提供LED调光比高达5000:1,而REFI输入提供另外模拟调光功能.器件采用广谱调制,以改善电磁兼容性能.MAX25611A/MAX25611B还可以用在Zeta和Cuk转换器配置.满足汽车规范AEC-Q100,可以组成升压,降压-升压,高边降压,Zeta和Cuk转换器等拓扑.主要用在汽车外部照明,远光/近光/信号/位置灯,日间行车灯(DRL),雾灯和自适应前灯总成,抬头显示器以及商用,工业和建筑物照明.本文介绍了MAX25611主要优势和特性,功能框图,多种应用电路包括升压应用,降压-升压应用,高边降压应用,SEPIC应用,Zeta应用,直流开关电源(CUK变换器)应用和电压稳压器应用电路图等以及评估板MAX25611 EVK主要特性,电路图,材料清单和PCB设计图.

The MAX25611A/MAX25611B are single-channel HBLED drivers for automotive front light applications such as high beam, low beam, daytime running light (DRL), turn indicator, fog light, and other LED lights. It can take an input voltage from 5V to 36V and can drive a string of LEDs with a maximum output voltage of 65V.

The MAX25611A/MAX25611B sense output current at the high side of the LED string. High-side current sensing is required to protect for shorts from the output to the ground or battery input. It is also the most flex­ible scheme for driving LEDs, allowing boost, high-side buck, SEPIC mode, or buck-boost mode configurations. The PWM input provides LED dimming ratios of up to 5000:1, and the REFI input..

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