线性降压LED汽车照明驱动VAS1086

VAS1086是一种宽输入范围恒流电路LED驱动器为广告灯箱、景观照明
其他LED照明应用。对大多数人来说应用,VAS1086只需要一个电流
设置电阻从SET到GND,一个从VIN到GND的陶瓷旁路电容器,无
铝电容器,肖特基二极管或电感需要。对于大电流应用,几个
VAS1086可并联连接以获得高功率输出。VAS1086利用外部电源
电阻,以减少芯片功耗时电源不良。与此同时VAS1086将自动线性减少
模具温度达到时的输出电流120°C时,此方法可避免LED指示灯闪烁。
还应提供超温保护集成的VAS1086随SOP8-e包提供。

General Description VAS1086 is a wide input range constant current LED driver provides cost-effective solution for advertising light boxes, landscape lighting and other LED illumination application. For most applications, VAS1086 only need one current setting resistor from SET to GND, and one ceramic bypass capacitor from VIN to GND, no aluminum capacitor, Schottky diode or inductor needed. For high current application, several VAS1086 can be connected in parallel to obtain high power output. VAS1086 make use of an external power resistor to reduce chip power dissipation when poor power supply is used. Meanwhile , the VAS1086 will automatically reduce linearly the output current when the die temperature reached 120°C, this method avoid LED bar blinking. Over temperature protection is also be integrated. VAS1086 is available with SOP8-e package. 

Features  Wide input range from 2.7 to 40 V  Simple application circuits  Up to 400mA output current capability  Obtain larger output current by in parallel  External power resistor avoid over-heat  ±1% SET voltage accuracy  Support up to 20KHz PWM dimming  Over-Temperature-Protection function  SOP8-e package Ordering Information 

Application  Advertising light boxes  Landscape lighting  The low end of the current sink  Ideal current source 

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