LMX1622-05-01 Microsemi Corporation, LMX1622-05-01 Datasheet - Page 5

• Manufacturer Part Number: LMX1622-05-01
• Description: DUAL 5W / DIGITAL DIMMING CCFL INVERTER MODULE
• Manufacturer: Microsemi Corporation

Copyright
Rev. 0.5,2001-01-18
A
HIGHLIGHTS (CONTINUED)
M I C R O S E M I
In applications with no access to a vertical sync, an onboard
oscillator operates the inverter burst rate at about 270Hz. In
this non-synchronous mode, minor display disturbances can
be found under certain video conditions. This performance
may
synchronization must be used when no disturbance can be
tolerated.
2000
0 < P.W. < 100% of period
0
V
be
S YN C


F ig u re 5 A - PW M B rightness C ontrol
PW M Signal
from System
1mS to 200µ S
2.5 -
5V
acceptable
B R IT E R T N

SLEEP
B R IT E
P.W .
F ig ure 5 - B rightness C ontrol
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: [phone]
LX M 1622-05-xx
V
S YN C
             
                    

for
C O M P A N Y
LXM 1622-05-xx
BR IT E
+5V
many
G N D
V
IN
D C
applications,
              
              
V
Linfinity Microelectronics Division
V
LO
H I

Microsemi
C C F L
T U B E
RangeMAX
but
D
UAL
The Brightness control may be a voltage output DAC, or
other voltage source as shown in Figure 5. A 2.5V to 5V
Logic Level PWM signal from a micro-controller may
also be used as shown in Figure 5A.
If synchronization to the video frame rate is desired,
connect the vertical sync pulse from the system video
controller to the V
is desired, connect V
If you need to turn the inverter ON/OFF remotely, connect
a 2.5V to 5V logic signal to the SLEEP input. If remote
ON/OFF is not needed, connect the SLEEP input to V
other voltage source between 2.5V and 5V.
Connect V
V
Never connect V
lamp current regulation. If both lamp wires have heavy
high voltage insulation, connect the longest wire to V
This wire is typically white.
Also available in single lamp inverters LXM1612-xx-
xx, 12V dual LXM1622-12-xx and 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.
A single input will accommodate negative and positive
vertical sync pulses at any pulse width.
LO
      

5W, D
to the low voltage wire (wire with thinner insulation).
P
RELIMINARY
IGITAL
  % & "
HI
% & "   
to high voltage wire from the lamp. Connect
D
IMMING
LO
SYNC
          
SYNC
to circuit ground as this will defeat
input. If no video synchronization
D
CCFL I
to ground.
ATA
       
S
LXM1622-05-xx
NVERTER
HEET
M
ODULE
Page 5
IN
LO
or
.