Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1
Copyright © 2007
Rev. 1.2, 2010-08-20
WWW.Microsemi .COM
RangeMAX
LXMG1621-xx
DIGITAL DIMMING DUAL LAMP CCFL INVERTER MODULE
TM
®
DESCRIPTION
The LXMG1621 Direct Drive™ CCFL
(Cold Cathode Fluorescent Lamp)
Inverter Modules are specifically
designed for driving two lamp LCD
backlight displays.
Similar to the LXMG1620, the
LXMG1621 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 LXMG1620 or any
traditional dimming CCFL inverters, the
LXMG1621 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. “night readable”).
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 “burst
drive” that energizes the lamp was
designed specifically to ensure that no
premature lamp degradation occurs (see
the “How RangeMAX works” section).
The module design is based on a new
Direct Drive topology, which provides a
number of cost and performance
advantages.
Microsemi’s 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 LXMG1621 is fully customizable
(electronically and mechanically) to
specific customer requirements.
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
Protected By U.S. Patents: 5,923,129; 5,930,121; Patents Pending
KEY FEATURES
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
RoHS Compliant
UL 60950 E17590
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, “Low Brightness”
Capability Allows For Advanced
Power Management
PRODUCT HIGHLIGHT
UNIVERSAL DIMMING INPUT
V
DC
OR POTENTIOMETER
1
2
3
W
1
2
3
W
BRITE
DC Voltage
Source
Potentiometer
MODULE ORDER INFO
PART NUMBER
L
AMP
CURRENT
L
AMP RUN VOLTAGE (RMS)
LXMG1621-01 7mA 500-750
LXMG1621-02 6mA 350-550
LXMG1621-04 6mA 470-640
L
L
X
X
M
M
G
G
1
1
6
6
2
2
1
1
-
-
X
X
X
X