AS3812

16-Channel LED Driver for Local Dimming

Short-Form Datasheet

Page 1

R16DO0039EU0120 Rev.1.20

Jul 17, 2024

The AS3812 is the next generation of fully integrated

16-channel LED backlight driver. LED current set

resistors are integrated in order to save external

components as well as reducing the pin-count of the

IC while maintaining a very high absolute LED current

accuracy of ±1%.

The speed of the current regulation has been

increased to support minimum PWM on times down to

1µs.12-bit fully flexible PWM generators per channel

and 10-bit LED current resolution can be used to

adjust the brightness of the LED strings.

Dialog’s patented digital enhanced DC/DC feedback

function is regulating any external SMPS to the best

suitable output voltage needs of the LED strings to

minimize power dissipation.

Dialog’s patented dimming method allows

synchronizing the PWM generators with V/HSYNC of

the video SOC/GPU.

The device can be programmed via SPI and daisy

chain connection to cascade many devices easily.

Features

▪ 16 fully flexible, 12-bit PWM generators provide

optimium power savings through local dimming

▪ Period, high time, delay, reverse functions

▪ Global 10-bit IDAC gives ±1% LED current

accuracy for highest brightness uniformity

▪ Integrated current sink FETs and current set

resistors – Lower BOM cost

▪ VSYNC and HSYNC inputs and integrated

digital PLL allow synchronization with TV frame

▪ Universally compatible DC/DC feedback

architecture with digital enhancement –

configurable via SPI

▪ Fully protected with integrated features

▪ Short/Open LED detection

▪ Over-temperature shutdown

▪ Register lock/unlock

▪ Minimum PWM on-time of 1ms – enables high

contrast ratios

Applications

▪ Ultra-HD/4K TVs

▪ LCD Monitors

▪ Notebooks/medium-small size displays