PanelMatch鈩?/div>
I
NTEGRATED
PRODUCTS
LXM1643-12-62
12V Quad 6W CCFL Programmable Inverter Module
P
RELIMINARY
D
ATASHEET
DESCRIPTION
KEY FEATURES
WWW .
Microsemi
.C
OM
The LXM1643-12-62 is a Quad 6W
Output Direct Drive鈩?CCFL (Cold
Cathode Fluorescent Lamp) Inverter
Module specifically designed for driving
LCD backlight lamps. It is ideal for
driving typical 12.1鈥?to 18.1鈥?TFT panels.
LXM1643 modules provides the
designer with a vastly superior display
brightness range then typical with analog
(amplitude control) dimming.
The inverter includes a dimming input
that permits brightness control from either
a DC voltage source or a PWM signal or
external Potentiometer. The maximum
output current is externally programmable
over a range of 5 to 8mA in 1mA steps to
allow the inverter to properly match to a
wide array of LCD panel lamp current
specifications.
RangeMAX
Digital
Dimming
Technique provides flicker-free brightness
control in any wide range typically (50:1+)
dimming application.
The resultant 鈥渂urst drive鈥?that
energizes the lamp was designed
specifically to ensure that no premature
lamp degradation occurs, while allowing
significant power savings at lower dim
levels.
The modules convert DC voltage from
the system battery or AC adapter directly
to high frequency, high-voltage waves
required to ignite and operate CCFL
lamps.
The LXM1643-12-62
inverter is
intended for panel assemblies with
individual lamp connections, or where
lamps are spaced apart from each other.
The LXM1643-12-61 inverter should be
used for panel applications where lamp
pairs are in close proximity and share a
common return (low side) wire.
Other benefits of this new topology
are stable fixed-frequency operation,
secondary-side strike-voltage regulation
and both open/shorted lamp protection
with fault timeout.
PRODUCT HIGHLIGHT
Externally Programmable
Maximum Output Current
Easy to Use Brightness
Control
RangeMAX Wide Range
Dimming
Output Short-Circuit Protection
and Automatic Strike-Voltage
Regulation and Timeout
Fixed Frequency Operation
Rated From -20 to 70擄C
UL 60950 E175910
APPLICATIONS
High Brightness Displays
Desktop Displays
Industrial Display Controls
BENEFITS
Smooth, Flicker Free 2%-
100% Full-Range Brightness
Control
Programmable output
current allows inverter to
mate with a wide variety of
LCD panel specifications
IMPORTANT:
For the most current data, consult
MICROSEMI鈥檚
website:
http://www.microsemi.com
Universal Dimming Input PWM, VDC, or Potentiometer
DC Voltage
Source
Potentiometer
PWM
Signal
LXM1643-12-62
LXM1643-12-62
Selectable Maximum Output Current 5mA to 8mA
RMS
PACKAGE ORDER INFO
P
ART
N
UMBER
LXM1643-12-62
O
UTPUT
C
ONNECTORS
Four JST SM02B-BHSS-1-TB
I
NVERTER
M
ATES
D
IRECTLY TO
P
ANEL
C
ONNECTORS
JST BHSR-02VS-1
Copyright
錚?/div>
2002
Rev. 0.5, 2003-01-20
Microsemi
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1
1
2
3
4
5
6
