16-Channel Local Dimming LED Backlight Controller
Jump to Page Section:
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
Applications
- HD TVs
- UHD TVs
- Monitor
- High dynamic range (HDR) monitors and displays
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 | Get Samples, | |
| 48 QFN | Tape & Reel | Get Samples, |
Tips for Using This Parametric Table:
- Hide Filters button in header: Collapse or expands filters
- Column sort buttons in header: Sort Column alphabetically / numerically descending or ascending
- Reset button in header: Reset all filters to the page default
- Full Screen button in header: Expand the table to full screen view (user must close out of full screen before they can interact with rest of page)
- Export button in header: Export the filtered results of the table to an Excel document
- Filter parts search bar in header: Type to filter table results by part number
- Hide column button in column headers: Select to hide columns in table
- AND / OR toggle switches in header: Toggles the logic of this particular filter to be “AND” or “OR” logic for filtering results
- Multiselect checkboxes at beginning of each row in table: Select these checkboxes to compare products against each other
- Document icon next to product name in row: View the featured document for this product
- Chip icon next to the right of the document icon in row: View the block diagram for this product
- Cart icon to the right of the chip icon: Indicates that samples are available for this product
Support
Renesas Samples
Select an orderable part number:
| Orderable Part ID | Sample |
|---|---|
| AS3824A1-ZQFT | Availability |
| AS3824E1-ZQFT | Availability |