Overview
Description
The 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% to 30%.
The AS3824 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.
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 are available
Features
- No limit of VLED or ILED, controller not exposed to high voltage/current
- One global high accurate 10-bit DAC which sets the LED current (±.5% accurate)
- 16 independent 8-bit DACs can be used to boost/decrease LED current within certain frames
- Packages:
- QFN-48 (7.0mm x 7.0mm, 0.5mm pitch)
- LQFP-44 (10mm x 10mm, 0.8mm pitch)
Comparison
Applications
- HD TVs
- UHD TVs
- Monitor
- High dynamic range (HDR) monitors and displays
Documentation
Featured Documentation
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| Type | Title | Date |
| Datasheet - Short-form | PDF 327 KB | |
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Design & Development
Models
ECAD Models
Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on products in the Product Options table. If a symbol or model isn't available, it can be requested directly from the website.
Processing table
| 48 QFN | Tape & Reel | 3 | Get Samples, | ||
| 48 QFN | Tape & Reel | 3 | 1.912 | Get Samples, |
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