LX1692FIPW

LX1692F TM ® Full Bridge Resonant CCFL Controller P RODUCTION D ATA S HEET DESCRIPTION KEY FEATURES WWW . Microsemi . C OM Microsemi’s LX1692F is a cost reduced, third generation CCFL (Cold Cathode Fluorescent Lamp) controller. The integrated controller is optimized to drive CCFL’s using resonant full bridge inverter topology. 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. The LX1692F includes safety features that limit the transformer secondary voltage and protect against fault conditions which include open lamp, and broken lamp faults. The LX1692F regulates the CCFL brightness in three ways: analog dimming, digital dimming, or combined analog and digital dimming methods simultaneously to achieve the widest dimming range (> 60 to 1). The LX1692F can accept a brightness control signal that is either an analog voltage or a low frequency PWM. The LX1692F also features integrated gate drivers for the four external power MOSFETs. An integrated 4V LDO powering all internal control circuitry greatly simplifies supply voltage requirements. The LX1692F is available in either a 20-Pin TSSOP or SOIC package. Low Stress to Transformers Wide Dimming Range Analog Dimming: > 3 to 1 Digital Dimming : > 20 to 1 Combined: > 60 to 1 Programmable Burst Dimming Frequency Programmable Time-Out Protection Fixed Operating Frequency Open-Lamp Voltage Protection Soft Rise/Fall Burst Dimming Control 3% Tolerance Brightness Reference Voltage BENEFITS Even Display Light Distribution Longer Lamp Life with Optimized Lamp Current Amplitude Reduced Operating Voltage Lowers Corona Discharge and Prolongs Inverter Life High “Nits / Watt” Efficiency Makes Less Heat and Brighter Displays 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 PRODUCT HIGHLIGHT APPLICATIONS LCD TV LCD Monitor PACKAGE ORDER INFO LX1692F LX1692F TA (°C) -20 to +85 PW Plastic TSSOP 20-Pin LX1692FIPW DW Plastic SOIC 20-Pin LX1692FIDW RoHS Compliant / Pb-free RoHS Compliant / Pb-free Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX1692FIPW-TR) Copyright © 2008 Rev. 1.0, 8/28/2008 Microsemi Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 1 TM ® W WW . Microsemi . C OM INFORMATION 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: IPGdatasheets@microsemi.com 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