PanelMatch鈩?/div>
I N T E G R A T E D
P R O D U C T S
LXM1643-12-61
12V Quad 6W CCFL Programmable Inverter Module
P
RELIMINARY
D
ATASHEET
DESCRIPTION
KEY FEATURES
WWW .
Microsemi
.C
OM
The LXM1643-12-61 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 10 to 16mA (per lamp pair)
in 2mA 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 LXM1643-12-61
inverter is
intended for panel assemblies where lamp
pairs share close proximity with one
another. The LXM1643-12-62 inverter
should be considered for panel
applications with individual lamp
connections or where lamps are spaced
well apart from each other.
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.
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鈥檚 specifications
IMPORTANT:
For the most current data and a panel to inverter cross reference, consult
MICROSEMI鈥檚
website:
http://www.microsemi.com
PRODUCT HIGHLIGHT
Universal Dimming Input PWM, VDC, or
DC Voltage
Source
Potentiometer
PWM
Signal
LXM1643-12-61
LXM1643-12-61
Selectable Maximum Output Current 10mA to 16mA
RMS
PACKAGE ORDER INFO
P
ART
N
UMBER
LXM1643-12-61
Copyright
錚?/div>
2002
Rev. 0.5, 2003-01-20
O
UTPUT
C
ONNECTORS
Two JST SM04(4.0)B-BHS-1-TB
I
NVERTER
M
ATES
D
IRECTLY TO
P
ANEL
C
ONNECTORS
JST BHR-04VS-1
Page 1
Microsemi
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
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