On Semi NCV7692汽车LED灯电流控制解决方案
On Semi公司的NCV7692汽车LED灯电流控制器,采用外接NPN双极器件和反馈电阻来调整驱动LED的电流.单个驱动器使用户能灵活增加单路到多路系统中.专用的调光特性通过PWM输入引脚来实现.当检测到开路或短路时单路驱动器就开关断.LED亮度采用串联在双极晶体管的外接电阻进行编程.单个NCV7692可驱动多个LED串.NCV7692可采用PWM控制,外接可编电流电阻,可选择负温度系统电流控制,开路LED串和短路LED串诊断,多个LED串控制,满足AEC−Q100 规范和PPAP功能.主要用在汽车后组合灯(RCL),日间灯(DRL),雾灯,中央高位刹车灯(CHMSL)阵列,转向灯和其它外部调制应用,通用汽车线性电流LED驱动器.本文介绍了NCV7692主要特性,框图和多种应用框图,以及评估板EVBUM2664主要特性,电路图和评估板EVBUM2664应用电路与PCB设计图.
The NCV7692 is a device which uses an external NPN bipolar device combined with feedback resistor(s) to regulate a current for use in driving LEDs. The target application for this device is automotive rear combination lamps. A single driver gives the user flexibility to add single channels to multichannel systems. A dedicated dimming feature is included via the PWM input pin. The individual driver is turned off when an open load or short circuit is detected.
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