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