PRODUCT SUMMARY AAT2499 Two-Channel LED Backlight Driver for LCD TV Applications General Description Features The AAT2499 is a highly integrated two channel TVLiteTM LED driver for backlight arrays in large size LCD TV Panels and is specifically paired for operation with the AAT2469 control IC. Integrated current sink MOSFETs can stand off up to 150V and regulate LED current up to 250mA per string. An internal I-Precise current control on each constant current sink circuit assures current accuracy and matching tolerances are better than ±1.5%. • LED string current control up to 250mA/string • 150V LED string protection • 2 Programmable LED Current Sinks ▪ ± 1.5% Accuracy @ 25°C ▪ ± 1.5% Matching @ 25°C • High Speed Shift Register I/O • High Resolution Digital Control for Individual Channels ▪ 12-Bit Resolution Grayscale PWM Brightness1 ▪ 12-Bit Resolution Channel Phase Delay1 • Global Current Setting (Dot Correction) By Simple Reference Adjustment • VSYNC PWM and Delay Synchronization • Integrated Fault Protection ▪ Programmable Fault Blanking ▪ Open and Short Circuit LED(s) ▪ Current Limit Protection ▪ Over-Temperature Protection • Fault Reporting Via Shift Register Read Bits • Soft-Start to Minimize Inrush Current • 16 pin SOP-EP Package with 1.27mm lead pitch The two LED constant current sinks are externally controlled by a 64-bit shift register that provides 12 bits of grayscale and delay programming resolution. The LED string supply voltage is regulated by a current sense feedback signal to the host AAT2469 control IC, which in turn provides a current mode feedback to the system LED power source. The AAT2499 fault system includes open circuit LED, short circuit LED and over temperature detection. All fault conditions are reported via an open drain fault flag and through the serial shift register. Thermal protection circuitry shuts down the device in the event of an overtemperature condition. The AAT2499 is available in a Pb-free 16 pin SOP-EP package. Applications • Large Size LCD TVs ▪ Large Tile Local Dimming Systems ▪ Segmented Edge Backlighting • LCD Panels White LED Backlight. 1. 11-Bit Resolution with PWM Doubling Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202168A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 12, 2012 1 PRODUCT SUMMARY AAT2499 Two-Channel LED Backlight Driver for LCD TV Applications Ordering Information Package Marking1 Part Number (Tape and Reel)2 SOP-EP-16 XXYW2499 AAT2499IAN-T1 Skyworks Green™ products are compliant with all applicable legislation and are halogen-free. For additional information, refer to Skyworks Definition of Green™, document number SQ04-0074. Package Information SOP-EP-16 All dimensions in millimeters. 1. XX = assembly code, YW = year and date code. 2. Sample stock is generally held on part numbers listed in BOLD. 3. The leadless package family, which includes QFN, TQFN, DFN, TDFN and STDFN, has exposed copper (unplated) at the end of the lead terminals due to the manufacturing process. A solder fillet at the exposed copper edge cannot be guaranteed and is not required to ensure a proper bottom solder connection. 2 Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202168A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 12, 2012 PRODUCT SUMMARY AAT2499 Two-Channel LED Backlight Driver for LCD TV Applications Copyright © 2012 Skyworks Solutions, Inc. All Rights Reserved. Information in this document is provided in connection with Skyworks Solutions, Inc. (“Skyworks”) products or services. These materials, including the information contained herein, are provided by Skyworks as a service to its customers and may be used for informational purposes only by the customer. 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Skyworks assumes no liability for applications assistance, customer product design, or damage to any equipment resulting from the use of Skyworks products outside of stated published specifications or parameters. Skyworks, the Skyworks symbol, and “Breakthrough Simplicity” are trademarks or registered trademarks of Skyworks Solutions, Inc., in the United States and other countries. Third-party brands and names are for identification purposes only, and are the property of their respective owners. Additional information, including relevant terms and conditions, posted at www.skyworksinc.com, are incorporated by reference. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202168A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 12, 2012 3