LXM1621-03 MICROSEMI, LXM1621-03 Datasheet - Page 8

• Manufacturer Part Number: LXM1621-03
• Manufacturer: MICROSEMI

Specifications of LXM1621-03

• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 22
• Lead Free Status / Rohs Status: Not Compliant

Copyright © 2000
Rev. 1.0a, 2005-02-07
HIGHLIGHTS (CONTINUED)
•
< 10k
In applications with no access to a vertical sync, the
inverter burst frequency can be allowed to “free run” at
95Hz.
disturbances may be found under certain video conditions.
This performance is acceptable for many applications, but
synchronization must be used when no disturbance can be
tolerated.
* use 4.99k for 5V PWM amplitude, 15k for 3.3V PWM
amplitude, and omit for 2.5V PWM amplitute.
PWM Signal
from System
2.5V
Figure 8 - PWM Brightness Control
V
0
SYNC
0 < P.W. < 100% of period
I N T E G R A T E D
< 100µs
In this non-synchronous mode, minor display
DC
5V
Figure 7- Brightness Control
P.W.
BRITE
SLEEP
4.99k*
4.99k
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: [phone]
V
SYNC
LXM1621-xx
H O W T H E R A N G E M A X W O R K S ( C O N T I N U E D )
12V
V
4.7µF
IN
GND
P R O D U C T S
LXM1621-xx
BRITE
T Y P I C A L A P P L I C A T I O N
Linfinity Microelectronics Division
V
V
V
HI2
HI1
LO
Microsemi
RangeMAX™
•
•
•
•
•
D
IGITAL
The brightness control may be a simple 10k potentiometer
or a voltage output DAC. A PWM signal from a micro-
controller may also be used with a suitable filter such as
shown in figure 8.
If synchronization to the video frame rate is desired,
connect the vertical sync pulse from the system video
controller to the appropriate V
synchronization is desired, connect V
If you need to turn the inverter ON/OFF remotely, connect
a 3V or 5V logic signal to the SLEEP input. If remote
ON/OFF is not needed, connect the SLEEP input to V
any other voltage greater than 2.2V
Connect V
V
If both lamp wires have heavy high voltage insulation,
connect the longest wire to V
to ground (GND pin) on the inverter PCB. Always insure
a good lamp return by using a wire. Do not rely on a
chassis ground connection
Also available in single lamp inverters are the
LXM1612-xx-xx or LXM1615-xx-xx, as well as the
12V dual lamp LXM1621-12-xx, LXM1622-xx-xx, and
the Quad output LXM1641-01 versions for multiple
lamp applications.
Separate feedback loops for lamp current and open circuit
voltage regulation insure reliable strike under all operating
conditions, automatic over-voltage prevention with broken
or failed lamps, and accurate lamp current regulation.
LO
to the low voltage wire (wire with thinner insulation).
D
IMMING
P
RODUCTION
R a n g e M A X I N V E R T E R S
HI
to high voltage wire from the lamp. Connect
D
UAL
L
AMP
D
CCFL I
ATA
.
LO
S
. V
NVERTER
HEET
SYNC
DC
LO
LXM1621-xx
SYNC
.
is connected directly
input. If no video
M
to ground.
ODULE
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