AS3833 - austriamicrosystems

AS3833 6 channel high-precision LED controller

The AS3833 is a 6 channel high precision LED controller with PWM input for driving external bipolar transistors in LCD-backlight panels, optimized for 2D and 3D operation. 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 supp.

Features

include under-voltage and thermal shutdown as well as open and short LED detection. 2 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% Channel to channel accuracy+/- 0.6% 1 PWM input with internal phase shift Open LED detection and disconnect Short LED protection and auto-turnoff Undervoltage shutdown Temperature shutdown Temperature supervision of external BJT BJT Beta compensation SMPS feedback control DCDC Softstart Function Over Voltage Protection (OV.