Skip to main content

AS3824

16-channel local dimming LED backlight controller

as3824_functional_block_diagram_-_web.jpg

AS3824 is a 16-channel LED TV backlight controller which performs local dimming of sections of a display screen to provide both improved picture quality and valuable power savings of up to 20-30%.

The new backlight controller is intended for use in the latest high-definition (HD) and ultra-high-definition (UHD, or ‘4K’) televisions, as well as high dynamic range (HDR) monitors and displays.

The AS3824 includes a fully flexible 12-bit PWM generator for each of its 16 channels, to enable sections of a display screen to be dimmed independently. Each PWM generator may be synchronized with an external synchronization signal.

The local dimming enabled by the AS3824 also provides for additional system power savings compared to global backlight controllers.

Lifecycle status

● Active

Features

No limit of VLED or ILED, controller not exposed to high voltage/current

One global high accurate 10bit DAC which sets the LED current (+-.5% accurate)

16 independent 8 bit DACs can be used to boost/decrease LED current within certain frames

Benefits

All LED backlight topologies

Optimum power savings through local dimming

Highest brightness uniformity

High Dynamic range boost function

Global Dimming Mode available

Lowest BOM

Two Package types available

Applications

HD TVs

UHD TVs

Monitor

HDR (High Dynamic Range) Monitors and Displays

Packages

QFN-48 (7.0 x 7.0 mm with 0.5mm pitch)

LQFP-44 (10 x 10 mm 0.8mm pitch)

Block Diagrams

as3824_functional_block_diagram_-_web.jpg

Functional Block Diagram

as3824_typical_applications_diagram_-_web.jpg

Typical Applications Diagram

Stay connected

Get in touch with us directly through our worldwide sales offices, or contact one of our global distributors and representatives.

Inquiries Distributors and Representatives Register for newsletters
Product Briefs and Summaries
Name Date Version
AS3824 Product Summary (566.05 KB) 06/03/2020 1.0