LXM1622-12-01 Microsemi Analog Mixed Signal Group, LXM1622-12-01 Datasheet - Page 4

• Manufacturer Part Number: LXM1622-12-01
• Description: MOD INVERTER CCFL DIM DUAL 5W
• Manufacturer: Microsemi Analog Mixed Signal Group
• Series: LXM1622r
• Type: Inverters for CCFL and UV Lampsr

Specifications of LXM1622-12-01

• Voltage - Input: 12V
• Output: 1800V
• Size / Dimension: 4.88" L x 1.26" W x 0.30" H (124mm x 32mm x 7.6mm)
• Mounting Type: Chassis Mount
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Copyright © 2000
Rev. 1.0, 2005-02-07
varying lamp current magnitude to adjust light output,
RangeMAX inverters use a fixed lamp current value with a duty
cycle control method.
(continuous lamp current) down to a 5% duty cycle, allowing the
lamp to be dimmed to less than 3% of its full brightness.
design consideration was given to controlling lamp start voltage
to softly start current flow. This eliminates current overshoot
that can result in premature cathode wear and reduce lamp life.
LAMP VOLTAGE & LAMP CURRENT – BURST MODE OPERATION
2.2V
0.25 -
V
B R IT E
Rather than using the traditional dimming technique of
The lamp current burst width can be modulated from 100%
As can be seen in Trace 4 of Figure 3 photo at right, careful
V
D C
S YN C
Figure 4 – RangeMAX Simplified Block Diagram
Ramp
+ 3.5V
Ramp G en.
I N T E G R A T E D
5K
Figure 1 – 50% Burst Duty Cycle
C omparator
+
-
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: [phone]
T ransformer
I
Driver
SE N S E
V
SE N SE
High Voltage
T ransformer
P R O D U C T S
H O W T H E R A N G E M A X W O R K S
Integrated Products
Microsemi
V
V
V
V
RangeMAX™
H I
LO
LO
H I
HIGHLIGHTS
D
•
•
Figure 3 – 5% Burst Duty Cycle (Expanded Time Base)
UAL
Integrated brightness control circuit includes a DC
voltage to pulse width converter that minimizes system
design work and system noise susceptibility.
provides a familiar and convenient interface while
reducing the potential for externally induced noise, which
can cause lamp flicker.
RangeMAX inverter modules are designed to operate
with the burst frequency synchronized to the video frame
rate. This provides operation with no visible display
disturbances caused by beat frequencies between the
lamps and video frame rates. In this synchronous mode,
the inverter burst rate operates at twice the video refresh
rate, well beyond standard 50/60Hz video refresh rates
where the eye can perceive pulsing light.
5W, D
P
RODUCTION
IGITAL
Figure 2 – 5% Burst Duty Cycle
Not recommended for new design
D
IMMING
D
CCFL I
ATA
S
LXM1622-12-xx
NVERTER
HEET
M
ODULE
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