PanelMatch鈩?/div>
I N T E G R A T E D
P R O D U C T S
LXM1644-12-61
12V Quad 6W CCFL Programmable Inverter Module
P
RELIMINARY
D
ATASHEET
DESCRIPTION
KEY FEATURES
WWW .
Microsemi
.C
OM
The LXM1644-12-61 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.
The modules are available with 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
in 1mA steps to allow the inverter to
properly match to a wide array of LCD
panel lamp current specifications.
LXM1644
modules
unlike
the
LXM1643 series does not provide wide
range 鈥榖urst鈥?mode dimming, rather
dimming is provided by amplitude control
of the output current waveform, this limits
the potential dim range to typically less
than 5:1.
For applications not requiring wide
range dimming, amplitude control results
in lower ripple on the input supply and
reduced
potential
transient
noise
generation. Many STN type panels are
particularly well suited for current
amplitude dimming.
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 LXM1644-12-61 inverter is in-
tended for panel assemblies where lamp
pairs share close proximity with one
another and 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.
Externally Programmable
Maximum Output Current
Easy to Use Brightness
Control
Analog Current Amplitude
Dimming Method
Output Open/Short-Circuit
Protection 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
Compact, Low Profile
Design
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
LXM1644-12-61
LXM1644-12-61
Selectable Maximum Output Current 10mA to 16mA
RMS
PACKAGE ORDER INFO
ART
N
UMBER
O
UTPUT
C
ONNECTORS
Two JST SM04(4.0)B-BHS-1-TB
LXM1644-12-61
Copyright
錚?/div>
2002
Rev. 0.5a, 2003-01-20
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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