AS3833: 6 Channel High-Precision LED Controller for 3D-LCD Backlight with Integrated Step-Up Controller

The AS3833 is a 6 channel high precision LED controller with PWM input for driving external bipolar transistors in LED backlight panels, also optimized for 2D and 3D operation in TV applications. The integrated step-up controller provides the necessary output voltage for the LED string supply. The SMPS feedback control optimizes the power efficiency by adjusting the LED string supply voltage.

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  • 6 channel LED controller
  • Step-up controller optimized for 2D/3D mode
  • Supply voltage range: 12V to 50V
  • Output current up to 250mA per channel
  • Absolute current accuracy +/- 0.8%


  • LED Backlighting for 3D-LCD Backlight TV Sets and Monitors
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AS3833 Product Facts

Outputs [#]6
LED current per output [mA]300
Featuresintegrated step-up, 1 PWM input with phase shift, use of inexpensive BJTs with BETA compensation, LED string voltage only limited by BJT rating
Error detectionLED short/open with BJT temp. supervision
LED-to-LED matching [%]0.6
Supply voltage [V]12 - 50
PackageTQFP32 (7x7)-0.8p SOIC28-1.27p