LXM1641-01 Datasheet, PDF (1/11 Pages) Microsemi Corporation – DIGITAL DIMMING DUAL LAMP CCFL INVERTER MODULE

RangeMAX^TM LXM1641-01/-02/-03
DIGITAL DIMMING QUAD LAMP CCFL INVERTER MODULE
T H E I N F I N I T E P O W E R O F I N N O VAT I O N
PRELIMINARY DATA SHEET
DESCRIPTION
RangeMAX Wide Range Dimming, Quad
Output Inverter. The LXM1641 Direct
Drive^TM CCFL (Cold Cathode Fluorescent
Lamp) Inverter Modules are specifically de-
signed for driving LCD backlight lamps.
Similar to the LXM1640, the LXM1641 ex-
cels in applications where critical parameters
include very wide range dimmability, high ef-
ficiency and reliable fail-safe design in a small
form factor. These 12 volt input modules are
specifically designed with desktop and indus-
trial applications in mind.
Unlike the LXM1640 or any traditional
dimming CCFL inverters, the LXM1641 pro-
vides the designer a vastly superior display
brightness range. 1000:1+ brightness range
is achievable with a standard LCD display (see
Application Section). Our wide range dim-
ming provides exceptional display readability
at less than 1% of full brightness, allowing
both power savings and low ambient light op-
erating capability (i.e. "night readable").
RangeMAX Digital Dimming Tech-
nique. Digital dimming provides flicker-free
brightness control in any wide-range dimming
application. Dimming ratios greater than
1000:1 can be achieved. Incorporation of a
video synchronization feature allows wide
ratio dimming without the display distur-
bances and interference seen with competi-
tive 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
"How RangeMAX Works" Section).
Failsafe Feature For Multiple Lamp Ap-
plications. Our multi-output inverters are
designed to keep your application operating
at near normal brightness in the event that a
lamp fails. This allows the display to remain
"on-line" until lamp replacement is conve-
nient.
Direct Drive Technology. The module
design is based on a new patented¹ Direct
Drive topology, which provides a number of
cost and performance advantages. The
LXM1641-xx Direct Drive inverters eliminate
the classic resonant inductor and capacitors,
thus reducing cost and allowing a substantial
reduction in module size.
Universal Connector Configuration.
Linfinity's multiple lamp inverters include a
built in connector array for the most com-
mon LCD lamp configurations.
Additional Features. Other benefits of
this new topology are fixed-frequency opera-
tion and secondary-side strike-voltage regu-
lation.
Strike-voltage regulation minimizes corona
discharge in the output transformer and re-
lated circuitry, providing longer life and higher
reliability. All LXM1641 modules feature
both open and shorted lamp protection.
The LXM1641 is fully customizable (elec-
tronically and mechanically) to specific cus-
tomer requirements.
1 _{US Patent Numbers: 5923129 & 5930121}
KEY FEATURES
s RangeMAX Wide Range Dimming
s 8V to 16V Input Voltage Range
s Small Form Factor
s Easy To Use Brightness Control
s MicroAmp SLEEP Mode
s Output Short-Circuit Protection And
Automatic Strike-Voltage Regulation
s Fixed Frequency Operation
s Universal Connector Configuration
A P P L I C AT I O N S
s Hi-Brite Displays
s Desktop Displays
s Low Ambient Light Conditions (i.e. Aircraft
Cabins, Automobile)
s Industrial Applications
BENEFITS
s High Efficiency Reduces Heating Problems
s Smooth, Flicker Free 0-100% Full-Range
Brightness Control Gives Your Product A
High Quality Image
s Output Open Circuit Voltage Regulation
Minimizes Corona Discharge For Long Life
And High Reliability
s Power Efficient, "Low Brightness" Capability
Allows For Advanced Power Management
NOTE: For current data & package dimensions, visit our web site: http://www.linfinity.com.
MODULE ORDER INFORMATION
Part Number
Application
Inverter Mates Directly
to Panel Connectors
LXM1641-01
Quad Lamp Panels
JST BHR-03VS-1 (3-pin) &
JST BHR-04VS-1 (4-pin)
LXM1641-02
Sharp 18.1" Panel
JST XHP-9 (9-pin)
LXM1641-03 LG Electronics 18.1" Panel
JST BHSR-02VS-1 (2-pin)
LINFINITY MICROELECTRONICS INC.
Copyright © 1999
Rev. 0.7 12/99
11861 WESTERN AVENUE, GARDEN GROVE, CA. 92841, 714-898-8121, FAX: [phone]
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