线性降压LED汽车照明驱动VAS1086

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