Description

 The AS3691 features four high precision current sources for driving up to four LED strings (RGB or single color leds). Each of the four currents sources can be controlled independently by PWM inputs. The full scale current value is set by external resistors.

Key Features

•  4 x 400mA constant current outputs
•  Programmable with external resistors
•  4 independent PWM inputs
•  Absolute current accuracy ±0.5%
•  Automatic Supply Regulation to reduce power dissipation
•  Very wide output voltage current source voltage compliance
  •  Down to 0.41V
  •  Up to 15V
   
•  Integrated overtemperature protection
•  Separate sense pads (Rfb1-Rfb4) for easy and precise PCB Layout
•  Package
  •  DIE
  •  QFN24 4x4mm
   
•  Patent Pending

Applications

•  General Lighting
•  Backlighting
•  RGB Backlighting for LCD
•  White Color Balancing

Block diagram for AS3691 Backlighting IC