AAT2430B

PRODUCT SUMMARY

16 Channel White LED Driver Solution with LED Current and Timing Control

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Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com

201968A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • May 18, 2012

General Description

The AAT2430B is a highly integrated, high efficiency white

LED backlight solution for large size LCD panels used in

LCD TVs. By controlling external power MOSFETs (such as

the Skyworks' AAT2491 high-voltage TrenchDMOS

array), the AAT2430B facilitates 16 current sink channels

to provide precision constant-current drive for strings of

white LEDs, where the number of series-connected LEDs

per string is only limited by the system LED voltage sup-

ply. Current in each backlight string and string-to-string

matching is controlled using I-Precise™ sensing and con-

trol circuitry, a novel on-chip method to accurately control

drain current in external discrete power MOSFETs inde-

pendent of their construction and without the need for

precision sense resistors.

A 15MHz SPI compatible interface allows fast, indepen-

dent digital control of each current sink. Full scale LED

current is programmed using an external resistor. DOT

correction may be applied globally to all sink channels

with 8-bit resolution. Both phase delay and grayscale

clock (GS Clock) PWM on-time are user programmable

with 12-bit resolution for each current sink channel.

Timing and synchronization are determined by exter-

The AAT2430B provides latched fault handling and fault

reporting through the SPI interface and fault flag output

pin. The fault detection system reports open or short cir-

cuit LED strings and over-temperature events. The short

circuit LED detection threshold is user programmable.

The LED string supply voltage may be regulated by using

the voltage or current mode current sense feedback sig-

nal to the LED voltage regulator. This analog signal rep-

circuitry shuts down the device in the event of an over-

temperature condition.

The AAT2430B is available in the Pb-free, thermally

enhanced 64-pin 9mm x 9mm QFN and 64-pin 14mm x

14mm LQFP packages.

Features

• 16 Programmable LED Current Sinks

• SPI Interface

• High Resolution Digital Control for Individual

Channels

(Dot Correction)

• Device Addressing

• Integrated Fault Protection

• 9mm x 9mm 64-pin QFN Package with 0.5mm pitch

or 14mm x 14mm 64-pin Low Profile QFP Package

with 0.8mm pitch

Applications

• Large Size LCD TVs, Panels

• White LED Backlight, Dynamic Edge LCD TV Backlight