Maxim MAX25606汽车照明六开关阵列管理方案

Maxim公司的MAX25606是汽车照明用六开关阵列管理集成电路,具有六个单独控制的N沟MOSFET开关,每个开关的开态电阻0.2Ω,额定电压16V.单电流源能用来给所有串联的LED供电.单个LED通过跨接的旁路开关开通和关断来进行调光.器件可配置成两个串行应用:每串三个关串联.每个开关能串行连接一个,两个或三个LED.器件还开以并联两个开关,大电流LED供电.器件还包括内部电荷泵,给LED旁路开关的栅极驱动器提供电源.器件具有多支路UART通信既然口,多达64个可寻址的器件,和CAN物理层兼容,优化的PWM调光提供极好的调光性能,可编程的12位PWM调光,PWM调光状态渐变过渡,内部时钟发生器或外接时钟用来调光,可编程的转换速率用于EMI控制.器件满足AEC-Q100 grade 1规范,工作温度-40C 到 +125C.主要用在汽车阵列LED系统和自适应远光灯.本文介绍了MAX25606主要优势和特性,简化框图和框图,6路阵列照明电路以及评估系统MAX25606 EVS主要特性,电路图,材料清单和PCB设计图.

The MAX25606 6-switch matrix manager IC for automotive lighting applications includes a 6-switch array for bypassing individual LEDs in a single- or dual-string application. It features six individually controlled n-channel MOSFET switches with each switch having an on-resistance of 0.2Ω and rated to withstand 16V. A single current source can be used to power all the LEDs connected in series. Individual LEDs can be dimmed by turning on and off the bypass switches across each LED. The device can also be configured in two string applications with three switches in series per string. Each switch can be connected across one, two, or three LEDs in series. It also allows for parallel connection of two switches to bypass high-current LEDs. The IC also includes an internal charge pump that provides power for the gate drive for the LED bypass switches.

The IC features a universal asynchronous receiver-transmitter (UART) communication interface. Each switch can be turned on, turned off, or PWM modulated with 12 bits of PWM duty cycle adjustment. Transitions between two different PWM settings can either happen instantly or a logarithmic fade transition can be a...