LX6512 High Performance CCFL Controller ® TM P RODUCTION D ATA S HEET DESCRIPTION The LX6512 contains safety features that limit the transformer secondary voltage and protect against fault conditions which include open lamp, broken lamp and short-circuit faults. The over voltage fault shutdown is disabled during a user programmable interval to allow lamp strike. The controller can accept a brightness control signal that is either an analog voltage level, or a direct low frequency PWM. Utilizing this signal it provides CCFL brightness dimming control using digital dimming, to achieve a wide dimming range (> 60 to 1). An integrated 4V LDO (Low Dropout Regulator) powers all internal control circuitry and up to 5mA for external circuitry greatly simplifying supply voltage requirements. The LX6512 is available in a 16-Pin SOIC, TSSOP and 3x3 mm 16pin QFN. • Full Bridge or Direct Drive Push Pull Configurable • Patented Striking Topology • Low Stress to Transformers • Wide Dimming Range • Programmable Operating Dimming Frequency • Programmable Time Out Protection • Fixed Operating Frequency • Open Lamp Voltage Protection, Short Lamp Protection, Over Voltage Protection • Compatible with Existing Transformers WWW . Microsemi .C OM Microsemi’s LX6512 is a cost effective, Direct Drive CCFL (Cold Cathode Fluorescent Lamp) controller. The integrated controller is optimized to drive CCFL’s (Cold Cathode Fluorescent Lamps) using either resonant full bridge inverter topology or push-pull Direct Drive configurations. Resonant full bridge topology provides near sinusoidal waveforms over a wide supply voltage range in order to maximize the life of CCFL lamps, control EMI emissions, and maximize efficiency. This new architecture is also coupled with a wide dimming range capability. For fixed input supply applications the LX6512 uses Direct Drive topology to supply fixed frequency PWM signals connected directly to the high voltage transformer primary via a single pair of NFET drivers, providing a simple, low cost inverter solution. KEY FEATURES APPLICATIONS • • • • • Note Book LCD displays Transportable Computers Web Tablet LCD displays Digital Picture Frame Monitor / TV Portable DVD Player IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com Protected by U.S. Patents: 5,615,093; 5,923,129; 5,930,121; 6,198,234; 7,112,929; Patents Pending FUSE F1 CN1 1 2 3 4 5 6 7 8 C9 10uF VDDA R5 115K CON8 R1 61.9K R7 1M U2 1 C14 100pF 2 C2 100nF 3 BRITE_D VIN_SNS F_OSC VDDA B_OSC VDDP 16 VDDA 4 5 15 C6 0.1uF 3 6 14 C4 1uF 2 7 T1 C13 100nF C11 CN2 1 2 CON2 2pF PCB 4 C3 1uF 5 C5 3.9nF 6 7 8 ENA AOH U1 LX6512CLQ C_TO BOH EA_OUT GND V_SNS AOL ISNS BOL 13 1 8 C12 12 2.2nF 11 10 9 R4 374 Ohm LOW COMPONENT COUNT REQUIREMENT FOR TOTAL SYSTEM SOLUTION TA (°C) -20 to 85 D LQ PW THERMAL DATA Plastic SOIC 16-pin θJA = 82.2 °C/W Plastic 3x3 mm QFN 16-pin θJA = 33.3°C/W Plastic TSSOP 16-pin θJA = 99 °C/W RoHS Compliant / Pb-free THERMAL RESISTANCE-JUNCTION TO AMBIENT LX6512CD, LX6512CLQ or LX6512CPW Junction Temperature Calculation: TJ = TA + (PD x θJA). The θJA numbers are guidelines for the thermal performance of the device/pc-board system. All of the above assume no ambient airflow. Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX6512CD-TR) Copyright © 2007 Rev. 1.3, 10/22/2009 LX6512 PACKAGE ORDER INFO Microsemi Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 1 TM ® Thank you for your interest in Microsemi® Analog Mixed Signal products. The full data sheet for this device contains proprietary information. To obtain a copy, please contact your local Microsemi sales representative. The name of your local representative can be obtained at the following link http://www.microsemi.com/contact/contactfind.asp or Contact us directly by sending an email to: [email protected] Be sure to specify the data sheet you are requesting and include your company name and contact information and or vcard. We look forward to hearing from you. Copyright Microsemi Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 WWW . Microsemi .C OM INFORMATION