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.
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
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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
Functional Block Diagram
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