LX1697
PRODUCTION DATA SHEET
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1
Copyright © 2007
Rev 1.0, 8/1/2007
WWW.Microsemi .COM
High Performance CCFL Controller
TM ®
L
LX
X1
16
69
97
7
DESCRIPTION
The LX1697 is a high performance
CCFL controller optimized for wide
input voltage range notebook display
back lighting applications.
Its brightness control architecture
supports Intel’s DPST (Display Power
Saving Technology) that adjusts the
brightness as a function of video
content.
Digital Dimming duty cycle is
controlled by providing either a dc
voltage or a digital PW M signal to the
BRITE_D pin. Burst frequency can
be controlled either by the on chip
burst oscillator or directly by a low
frequency PWM logic signal at
BRITE_D.
The LX1697 includes a built in
5.1V regulator so it can be operated
directly from the battery without the
need of an external 5V supply from
the system. The controller’s power
stage consists of direct coupled full
bridge high voltage drivers for the
external N-channel high side and N-
channel low side powe r FETs.
The LX1697 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.
Additional features comprise an enable
input, under-voltage lockout, analog
programmable open lamp strike time-
out, over voltage, and short circuit fault
detection.
The LX1697 can also be used with
Microsemi’s LX1801 SMBus controller
to provide a completely digital
interfaced backlight control system.
The LX1697 is available in the 24
pin 4x4 mm MLPQ surface mount
package and is specified from -20°C to
70°C.
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
KEY FEATURES
7 to 25 Volts Wide Input Voltage
Range
Resistor Programmable Lamp
Operating Frequenc y within ±3%
Tolerance
Resistor Programmable Burst
Operating Frequenc y
Support IntelTM DPST for System
PWM input
Compatible with Microsemi’s ne w
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 displa ys
PACKAGE ORDER INFO
LQ Plastic 24pin MLPQ 4x4mm
TA (°C) RoHS Compliant / Pb-free
-20 to 70 LX1697CLQ
Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX1697CLQ-TR)
PRODUCT HIGHLIGHT
LX1697
GND
ISNS
VBS
BOH
VBH
VDD
MIN_BRITE
BOL
BATTERY VOLTAGE
( 7V – 25V)
VBAT
ON
OFF
VBAT
R_BST
ENABLE
BRITE_D
C_VCO
DIM_MODE
VSNS
PGND
R_LMP
VAS
AOH
VAH
AOL
VDD
VBAT
BLIM
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
TM ®
WWW.Microsemi .COM
Copyright
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.
