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  Microsemi Electronic Components Datasheet  

LX1699 Datasheet

CCFL Backlight Controller IC

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TM
LX1699
® High Performance CCFL controller
PRODUCTION DATASHEET
DESCRIPTION
The LX1699 is a high performance, low The LX1699 has improved lamp current
cost CCFL (Cold Cathode Fluorescent accuracy, fully programmable lamp
Lamp) controller optimized for wide input frequency and burst dimming frequency
voltage range display backlighting oscillators, and Microsemi’s patented full-
applications.
proof lamp strike circuitry.
The LX1699 brightness control Programmable open lamp strike timeout
architecture supports Intel’s DPST and open lamp, short lamp, and over
(Display Power Saving Technology) that voltage fault detection are fully
adjusts the brightness as a function of implemented.
video content.
Reverse analog dimming control is
The controller includes a built-in reference provided to set the lamp current from
voltage regulator so it can be operated maximum lamp current to max -1.8mArms
directly from the battery without the need range.
of an external 5V supply from the system.
The LX1699 power stage is full
bridge driven and includes DC coupled
high side drivers on chip for the external
P-channel high side and N-channel low
side power MOSFETs. Also for fixed
input supply applications the IC may be
Digital Dimming duty cycle is controlled
by providing either a DC voltage or a
PWM signal to the BRITE_D pin. Burst
frequency can be controlled by either by
the on chip precision oscillator or directly
by a logic signal at BRITE_D.
used as a Direct Drive CCFL controller The LX1699 is available in the 20 pin 4 x
connected directly to the high voltage 4mm QFN surface mount packages.
transformer primary via a single pair of Operating temperature ranges is -20’C ~
N-FET drivers.
70’C.
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
Patents Pending
KEY FEATURES
Microsemi Patented Direct Drive TM
or Full Bridge Configurable
6.5 to 24 Volts Wide Input Voltage
Range
Supports Intel TM DPST for System
PWM Input
Compatible with Microsemi’s New
SMBus CCFL Controllers
Fully Programmable Open Lamp
and Load Fault Time Outs
Detects and Shuts Down for all
Common Lamp Faults
On Chip Full Wave Rectifiers for
Lamp Voltage and Current
Uses Industry Standard High
Voltage Transformers
APPLICATIONS
Note Book LCD Displays
Transportable Computers
Web Tablet LCD displays
PRODUCT HIGHLIGHT
JST SM07 B-SRSS-TB-G
CN1
INV_PWR
INV_PWR
INV_PWM
DISOFF#
DAC_BRIG
GND
GND
1
2
3
4
5
6
7
F1 1.5A 24V
10K
R8
10K
R7
220pF
C7
1K
R5
4.7nF
C8
100K
R14
NU
C9
100nF
C10
1.0uF
C11
ISNS
R11 1K
VSNS
VDD
VDD
R3
511K
U1 LX1699CLQ
1
F_OSC
20
B_OSC
2 ENABLE
VIN_SNS 19
3 EA_OUT
4
BRITE_A
AGND
VDD
18
VDD
17
5 BRITE_D
VBAT 16
6 VCOMP
VP5 15
7 C_TO
AOH 14 AOH
8 I_SNS
BOH 13 BOH
9
V_SNS
12
AOL
AOL
10 PGND
BOL 11 BOL
47K
R2
33nF
C6
220pF
C5
470nF
C4
100nF
C2
C3
470nF
VBAT
AM4542C
U3B
BOH 4
C1
4.7uF
25V
AOH 4
AM4542C
U2B
VBS
10K
R13
C15 1uF
AM4542C
U3A
BOL 2
VAS
AOL 2
AM4542C
U2A
T1
TMP SIT24220-0839
4
1
JST SM02 B-BHSS-1-TB(LF)(SN)
100nF
C17
SM02
CN2
1
2
2
3
CI-8.5
24:2200
5
C16
15pF
3KV
VSNS
ISNS
C13 C14
10nF 4.7nF
C12 R12
340 Ohm
NU
PACKAGE ORDER INFO
TA (°C) LQ
Plastic 4x4 mm MLPQ 20-pin
RoHS Compliant / Pb-free
-20 to 70
LX1699CLQ
Note: Available in Tape & Reel. Append the letters “TR” to the part number.
(i.e. LX1699CLQ-TR)
THERMAL DATA
θJA = 31 °C/W
THERMAL RESISTANCE-JUNCTION TO AMBIENT
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.
Copyright © 2009
Rev. 1.0, 2008-09-05
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1


  Microsemi Electronic Components Datasheet  

LX1699 Datasheet

CCFL Backlight Controller IC

No Preview Available !

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TM
®
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


Part Number LX1699
Description CCFL Backlight Controller IC
Maker Microsemi Corporation
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LX1699 Datasheet PDF






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