P
A T E N T S
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TM
E N D I N G
LIN D
O C
#:
1611
RangeMAX
T
H E
LXM1611-01
D
A T A
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I G I TA L
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I M M I N G
C C F L I
N V E RT E R
M
O D U L E
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N F I N I T E
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O W E R
O F
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N N O VA T I O N
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R E L I M I N A R Y
S
H E E T
DESCRIPTION
RangeMAX Wide Range Dimming, Single
Output Inverter.
The LXM1611 series of
Direct Drive
TM
CCFL (Cold Cathode Fluores-
cent Lamp) Inverter Modules are specifically
designed for driving LCD backlight lamps.
Similar to the LXM1610, the LXM1611 ex-
cels in applications where critical parameters
include very wide range dimmability, high
efficiency and reliable fail-safe design in a
small form factor.
Unlike the LXM1610 or any traditional
dimming CCFL inverters, the LXM1611 pro-
vides the designer a vastly superior display
brightness range. 100:1+ brightness range
is achievable with virtually any LCD display.
Our wide range dimming provides excep-
tional display readability at less than 1% of
full brightness, allowing both power savings
and low ambient light operating capability
(i.e. "night readable").
The LXM1611 is recommended for use in
panels with low-voltage insulation on the
lamp return wire.
RangeMAX Digital Dimming Tech-
nique.
Digital dimming provides flicker-
free brightness control in any wide-range
dimming application. Dimming ratios greater
than 100:1 can be achieved. Incorporation
of a video synchronization feature allows
wide ratio dimming without the display dis-
turbances and interference seen with com-
petitive 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)
Wide Input Voltage Range.
The mod-
ules convert unregulated DC voltage from the
system battery or AC adapter directly to high-
frequency, high-voltage waves required to
ignite and operate CCFL lamps.
Direct Drive Technology.
The module
design is based on a new Direct Drive topol-
ogy, which provides a number of cost and
performance advantages. The LXM1611-01
series Direct Drive inverters eliminate the clas-
sic resonant inductor and capacitors, thus
reducing cost and allowing a 30% reduction
in module size.
Additional Features.
Other benefits of
this new topology are fixed-frequency op-
eration and secondary-side strike-voltage
regulation.
Strike-voltage regulation minimizes corona
discharge in the output transformer and re-
lated circuitry, providing longer life and higher
reliability. All LXM1611 modules feature both
open and shorted lamp protection.
The LXM1611 is fully customizable (elec-
tronically and mechanically) to specific cus-
tomer requirements.
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K E Y F E AT U R E S
RangeMAX Wide Range Dimming
8V to 18V Input Voltage Range
30% Smaller Than CS-ZVS Models
Easy To Use Brightness Control
MicroAmp SLEEP Mode
Output Short-Circuit Protection And
Automatic Strike-Voltage Regulation
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7.3mm Max. Module Height, 16mm Module
Width
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Fixed Frequency Operation
A P P L I C AT I O N S
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Notebook And Sub-Notebook Computers
Portable Instrumentation
Desktop Displays
Low Ambient Light Conditions (i.e. Aircraft
Cabins, Automobile)
BENEFITS
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High Efficiency And Sleep Mode Feature
Extends Computer Battery Life
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Smooth, Flicker Free 1-100% Full-Range
Brightness Control Gives Your Product A
High Quality Image
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Output Open Circuit Voltage Regulation
Minimizes Corona Discharge For Long Life
And High Reliability
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Power Efficient, "Low Brightness" Capability
Allows For Advanced Power Management
NOTE:
For current data & package dimensions, visit our web site:
http://www.linfinity.com.
PRODUCT HIGHLIGHT
R
ANGE
MAX
5
VS
.
A
NALOG
D
IMMING
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RangeMAX technology allows the designer to operate
in a lower "brightness" and therefore at lower "power
consumption" than can be reached using traditional
analog dimming inverters.
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Dotted line indicates area where panel variations and
parasitics will impact minimum light level with analog
dimming.
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Data presented for a RangeMAX inverter driving a
13.3" LCD with a 1.2 Nit to 120 Nit brightness range.
The minimum power levels were 0.4 watts
(RangeMAX) vs. 2.1 watts (analog dimming) for a
power consumption savings of 1.7 watts.
Power Used (Watts)
Standard Analog
Dimming Inverter
4
3
2
1
LinFinity's
RangeMAX
0
30
45
60
75
90
105
Light Output (Nits)
M O D U L E O R D E R I N F O R M AT I O N
LXM1611-01
Copyright 漏 1999
Rev. 0.4 8/99
L
IN
F
INITY
M
ICROELECTRONICS
I
NC
.
11861 W
ESTERN
A
VENUE
, G
ARDEN
G
ROVE
, CA. 92841, 714-898-8121, F
AX
: 714-893-2570
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