
Microsemi
Linfinity Microelectronics Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1
Copyright
2000
Rev. 0.3,2001-01-18
W
M
.
RangeMAX
LXM1622-12-xx
D
UAL
5W, D
IGITAL
D
IMMING
CCFL I
NVERTER
M
ODULE
P
RELIMINARY
D
ATA
S
HEET
A M I C R O S E M I C O M P A N Y
RangeMAX
Wide
Range
Dimming,
Dual
Output
Inverter.
The LMX1622
series of Direct Drive CCFL (Cold
Cathode Fluorescent Lamp) Inverter
Modules are specifically designed for
driving two lamp LCD displays. They are
available in two power and input voltage
ranges.
LMX1622
modules
designer with a vastly superior display
brightness range. This brightness range is
achievable
with
virtually
any
LCD
display
.
RangeMAX
Digital
Technique.
Digital dimming provides
flicker-free brightness control in any wide
range (100:1+) dimming application.
The modules are available with a dim-
ming input that permits brightness control
from either a DC voltage source or
a PWM signal.
provide
the
Dimming
The resultant “burst drive” that
energizes
the
lamp
specifically to ensure that no premature
lamp degradation occurs (See the “How
RangeMAX Works” section).
Input Voltage Range.
The modules
convert the DC voltage from a fixed 12V
supply directly to high frequency, high-
voltage waves required to ignite and
operate CCFL lamps. A 5V input inverter
is also available; LXM1612-05 series.
Direct Drive Technology.
The
modules design is based on a new Direct
Drive topology, which provides a number
of cost and performance advantages.
Additional Features.
Other benefits
of this new topology are fixed-frequency
operation, secondary-side strike-voltage
regulation, and both open and shorted
lamp protection. If lamp fails to strike the
inverter will timeout and shutdown.
was
designed
IMPORTANT:
For the most current data, consult
MICROSEMI
’s website:
http://www.microsemi.com
RangeMAX Wide Range
Dimming
Fixed 5V input
Easy to Use Brightness Control
Output Short-Circuit Protection
and Automatic Strike-Voltage
Regulation and Timeout
Fixed Frequency Operation
Microamp SLEEP mode
Notebook Sub-Notebook
Computers
Portable Instrumentation
Low Ambient Light
Smooth, Flicker Free 1-100%
Full-Range Brightness Control
Output Open Circuit Voltage
Regulation Minimizes Corona
Discharge For High Reliability
Power Efficient, “Low
Brightness” Capability Allows
For Advanced Power
Management
1
2
3
1
2
3
DC Voltage
Source
Potentiom eter
PW M
Signal
P
ART
N
UMBER
L
AMP
C
URRENT
L
AMP RUN
VOLTAGE
500-750
350-550
350-550
O
UTPUT
C
ONNECTOR
I
NVERTER
M
ATES
D
IRECTLY
TO
P
ANEL
C
ONNECTORS
BHR-03VS-1
BHR-03VS-1
QZ-19-3F01
LMX1622-12-01
LMX1622-12-02
LMX1622-12-03
6.5mA
5.5mA
5.5mA
JST SM02(8.0)B-BHS-1-TB
JST SM02(8.0)B-BHS-1-TB
Honda QZ-19-A3MYL #02
L
X
M
1
6
2
2
-
1
2
-
X
X
BRITE