PanelMatch錚?/div>
I N T E G R A T E D
P R O D U C T S
LXM1624-12-4x
12V Dual 4W CCFL Programmable Inverter Module
P
RELIMINARY
D
ATASHEET
DESCRIPTION
KEY FEATURES
WWW .
Microsemi
.C
OM
The LXM1624-12-4x is a Dual 4W
Output Direct Drive鈩?CCFL (Cold
Cathode Fluorescent Lamp) Inverter
Module specifically designed for driving
LCD backlight lamps. It is ideal for
driving typical 6.4鈥?to 10.4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 5 to 6.5mA
in 0.5mA steps to allow the inverter to
properly match to a wide array of LCD
panel lamp current specifications.
LXM1624
modules
unlike
the
LXM1623 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 modules design is based on
Microsemi鈥檚 new LX1689 backlight
controller, which provides a number of
cost and performance advantages due to
the controller鈥檚 high level of integration.
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 Automatic Strike-
Voltage Regulation and Timeout
Fixed Frequency Operation
Rated From -20 to 70擄C
UL60950 E175910
APPLICATIONS
High Brightness Displays
Portable Instrumentation
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
Output Open Circuit Voltage
Regulation Minimizes Corona
Discharge For High Reliability
IMPORTANT:
For the most current data, consult
MICROSEMI鈥檚
website:
http://www.microsemi.com
PRODUCT HIGHLIGHT
U
N IV E R S A L
DC
D
OR
IM M IN G
P
I
N P U T
"P W M ", V
,
O T E N T IO M E T E R
DC Voltage
Source
Potentiom eter
PW M
Signal
1
2
3
3
2
1
LXM1624-12-4
X
LXM1624-12-4
X
S
ELECTABLE
M
A X IM U M
TO
O
UTPUT
RM S
C
URRENT
5
M
A
6 .5
M
A
PACKAGE ORDER INFO
P
ART
N
UMBER
LXM1624-12-41
LXM1624-12-42
LXM1624-12-43
Copyright
錚?/div>
2002
Rev. 0.2a, 2003-01-20
O
UTPUT
C
ONNECTOR
JST SM02(8.0)B-BHS-1-TB
JST SM02B-BHSS-1-TB
Honda QZ-19-A3MYL #02
I
NVERTER
M
ATES
D
IRECTLY
TO
P
ANEL
C
ONNECTORS
JST BHR-03VS-1
JST BHSR-02VS-1
HONDA QZ-19-3F01
Page 1
Microsemi
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
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