RangeMAX铮?/div>
I N T E G R A T E D
P R O D U C T S
LXM1621-xx
D
IGITAL
D
IMMING
D
UAL
L
AMP
CCFL I
NVERTER
M
ODULE
P
RELIMINARY
D
ATA
S
HEET
DESCRIPTION
KEY FEATURES
WWW .
Microsemi
.C
OM
The LXM1621 Direct Drive鈩?CCFL
(Cold Cathode Fluorescent Lamp)
Inverter Modules are specifically
designed for driving two lamp LCD
backlight displays.
Similar to the LXM1620, the
LXM1621 excels in applications where
critical parameters include very wide
range dimmability, high efficiency, and
reliable fail-safe design in a small form
factor.
These 12 volt modules are
specifically designed with desktop and
industrial applications in mind.
Unlike the LXM1620 or any traditional
dimming CCFL inverters, the LXM1621
provides the designer a vastly superior
display brightness range.
100:1+
brightness range is achievable with a
standard LCD display (see Product
Highlight). Our wide range dimming
provides exceptional display readability at
less than 1% of full brightness, allowing
both power savings and low ambient light
operating capability(i.e. 鈥渘ight readable鈥?.
Digital dimming provides flicker-free
brightness control in any wide-range
dimming application.
Incorporation of a video synch-
ronization feature allows wide ratio
dimming without the display disturbances
and interference seen with competitive
products.
The modules are equipped with a
dimming input that permits brightness
control from an external potentiometer or
DC voltage source. The resultant 鈥渂urst
drive鈥?that energizes the lamp was
designed specifically to ensure that no
premature lamp degradation occurs (see
the 鈥淗ow RangeMAX works鈥?section).
The module design is based on a new
Direct Drive topology, which provides a
number of cost and performance
advantages.
Linfinity鈥檚 multiple lamp inverters
include a built in connector array for the
most common LCD lamp configurations.
Other benefits of this new topology are
fixed-frequency operation and secondary-
side strike-voltage regulation.
The LXM1621 is fully customizable
(electronically and mechanically) to
specific customer requirements.
RangeMAX Wide Range Dimming
8V to 16V Input Voltage Range
Small Form Factor
Easy To Use Brightness Control
MicroAmp SLEEP Mode
Output Short-Circuit Protection
And Automatic Strike-Voltage
Regulation
Fixed Frequency Operation
Universal Connector
Configuration
APPLICATIONS
Hi-Brite Displays
Desktop Displays
Low Ambient Light Conditions
(i.e. Aircraft Cabins, Automobile)
Industrial Applications
BENEFITS
High Efficiency Reduces Heating
Problems
Smooth, Flicker Free 0-100% Full-
Range Brightness Control Gives
Your Product A High Quality
Image
Output Open Circuit Voltage
Regulation Minimizes Corona
Discharge For Long Life And High
Reliability
Power Efficient, 鈥淟ow Brightness鈥?/div>
Capability Allows For Advanced
Power Management
IMPORTANT:
For the most current data, consult
MICROSEMI鈥檚
website:
http://www.microsemi.com
PRODUCT HIGHLIGHT
D C V oltage
S o urce
P o tentiom eter
BRITE
3
U
N IV E R S A L
D
IM M IN G
I
N P U T
V
DC
OR
P
O T E N T IO M E T E R
MODULE ORDER INFO
P
ART
N
UMBER
L
AMP
C
URRENT
LXM1621-01
LXM1621-02
LXM1621-03
LXM1621-04
Copyright
铮?/div>
2000
Rev. 0.7d, 2003-01-20
L
AMP RUN VOLTAGE
(RMS)
500-750
350-550
350-550
470-640
Page 1
7mA
6mA
6.5mA
5mA
Microsemi
Linfinity Microelectronics Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
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