SENSOR DRIVING LIGHTING

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.

Download Datasheet

KEY FEATURES

• 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%

AS3833 APPLICATIONS

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

(click to enlarge)

AS3833 PRODUCT FACTS

Outputs [#]	6
LED current per output [mA]	300
Features	integrated step-up, 1 PWM input with phase shift, use of inexpensive BJTs with BETA compensation, LED string voltage only limited by BJT rating
Error detection	LED short/open with BJT temp. supervision
Read-back
LED-to-LED matching [%]	0.6
Supply voltage [V]	12 - 50
Package	TQFP32 (7x7)-0.8p SOIC28-1.27p