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LX1693
TM (R)
High Performance CCFL Controller w/ALS
PRODUCTION DATA SHEET
DESCRIPTION
KEY FEATURES
WWW .Microsemi .C OM
The LX1693 is a high performance CCFL controller optimized for wide input voltage range notebook display back lighting applications. Its new brightness control architecture provides versatile support for ambient light sensor (ALS) control of panel brightness. It also supports Intel's DPST (Display Power Saving Technology) that adjusts the brightness as a function of video content. The ALS control architecture is compatible with all Microsemi visible light sensor products. The controller's digital dimming mode includes three brightness inputs: ALS_IN for the light sensor, BRITE_D for brightness and BST_SYNC for digital dimming and synchronization.. Burst frequency can be controlled either by the on chip burst oscillator or directly by an external logic signal at BST_SYNC. The on chip burst oscillator can either free run or
synchronize to an external signal. Digital Dimming duty cycle is controlled by providing either a DC voltage or a PWM signal to the BRITE_D pin. The LX1693 can be operated directly from the battery without the need of an external 5V supply from the system. The LX1693 power stage includes direct coupled full bridge high voltage drivers for the external N-channel high side and N-channel low side power FETs. The LX1693 includes lamp current and open lamp voltage regulation, fully programmable lamp frequency and burst dimming frequency oscillators, and our patented fool-proof lamp strike circuitry. Analog programmable open lamp strike time-out, over voltage, and short circuit fault detection are fully implemented. The LX1693 is available in the 28 pin 4 x5 MLPQ surface mount package.
7 to 25 Volts Wide Input Voltage Range Versatile Support for Ambient Light Sensor Brightness Control Resistor Programmable Lamp Operating Frequency within 4% Tolerance Resistor Programmable Burst Operating Frequency Support IntelTM DPST for System PWM input Compatible with Microsemi's new SMBus CCFL controllers Fully Programmable Open Lamp and Load Fault Time Outs On Chip Full Wave Rectifiers for Lamp Voltage and Current Cost Effective and Low Parts Count Inverter Modules Uses Industry Standard High Voltage Transformers
APPLICATIONS
Note Book LCD displays Transportable Computers Web Tablet LCD 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
LX1693 LX1693
PACKAGE ORDER INFO
TA (C) -20 to 70
LQ
Plastic MLPQ 4x5mm 28 pin
RoHS Compliant / Pb-free
LX1693CLQ
Note: Available in Tape & Reel. Append the letters "TR" to the part number. (i.e. LX1693CLQ-TR)
Copyright (c) 2007 Rev 1.0, 8/1/2007
Microsemi
Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1
TM
(R)
WWW .Microsemi .C OM
INFORMATION
Thank you for your interest in Microsemi(R) 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

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