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I N T E G R A T E D
P R O D U C T S
LXM1623-05-4x
5V Dual 4W CCFL Programmable Inverter Module
P
RELIMINARY
D
ATASHEET
DESCRIPTION
KEY FEATURES
WWW .
Microsemi
.C
OM
The LXM1623-05-4x 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.
LXM1623 modules provide the
designer with a vastly superior display
brightness range. This brightness range is
achievable with virtually any LCD display.
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.
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. A 12V input inverter is also
available (LXM1623-12-4x), as well as
6W versions (LXM1623-xx-6x) for
driving larger higher voltage panels.
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
RangeMAX Wide Range
Dimming
Output Open & Short-Circuit
Protection and Automatic Strike-
Voltage Regulation and Timeout
Fixed Frequency Operation
Rated From -20 to 70掳C
UL60950 E175910
APPLICATIONS
High Brightness Displays
Portable Instrumentation
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
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
NIVERSAL
D
IMMING
I
NPUT
"PWM", V
DC
,
OR
P
OTENTIOMETER
DC Voltage
Source
Potentiometer
PWM
Signal
2
3
S
ELECTABLE
M
AXIMUM
O
UTPUT
C
URRENT
5
M
A
TO
6.5
M
A
RMS
PACKAGE ORDER INFO
P
ART
N
UMBER
LXM1623-05-41
LXM1623-05-42
LXM1623-05-43
Copyright
铮?/div>
2002
Rev. 0.2e, 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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