Description

The AS3696 is a 4 channels precision LED controller with PWM inputs or internal PWM generator for driving external FETs in LCD-backlight panels. Build in safety features include thermal shutdown as well as open and short LED detection.

Key Features

• 2x2 Channel LED driver
• Output current only limited by external FET
• Build in shunt regulator
•  Absolute current accuracy +/- 1%
• Channel to channel accuracy +/- 1%
•  Normal Mode
• Linear current control with external voltage
• Digital PWM control with PWM input
• Build in PWM-generator with analog duty cycle control
• 3D Mode
• Linear current control with external voltage
• Digital PWM control with 2 PWM inputs
• Open LED detection and auto-turnoff
• Short LED detection and auto-turnoff
•  Temperature shutdown
• 2x automatic supply regulation feedback
• Package QFN 32pin 5x5mm, 0.5mm pitch
• Package TQFP 32pin 7x7mm, 0.8mm pitch

Applications

· LED backlighting for 3D- LCD – TV sets and monitors

Block diagram for AS3696 Backlighting IC