LXM1615-03-04 View Datasheet(PDF) - Microsemi Corporation
Part Name
Description
Manufacturer
LXM1615-03-04 Datasheet PDF : 5 Pages
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RangeMAX™
LXM1615-03-xx
3.6/5V 2W, DIGITAL DIMMING CCFL INVERTER MODULE
A MICROSEMI COMPANY
PRELIMINARY DATA SHEET
HIGHLIGHTS (CONTINUED)
• 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.
3.2V - 4.2V
or 5V
3.3V
DC
+3.3V
B R IT E
V
BATT
V
HI
LXM1615-03-xx
V SYN C
V
LO
SYNC GND
CCFL
TUBE
Figure 5 - Brightness Control
PW M Signal
from System
BRITE
P.W .
< 200µS
LXM1615-03-xx
0 < P.W. < 100% of period
• The Brightness control may be a voltage output DAC, or
other voltage source as shown in Figure 5. A 3.3V 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 VSYNC input. If no video
synchronization is desired, connect VSYNC to ground.
• If you need to turn the inverter ON/OFF remotely, use the
+3.3V Logic Supply pin.
• Connect VHI to high voltage wire from the lamp.
Connect VLO to the low voltage wire (wire with thinner
insulation). Never connect VLO to circuit ground as this
will defeat lamp current regulation. If both lamp wires
have heavy high voltage insulation, connect the longest
wire to VLO. This wire is typically white.
"# $
Also available in higher power single lamp inverters
LXM1612-xx-xx, Dual Output LXM1621-01,
LXM1622-xx-xx and Quad Output LXM1641-01
versions for multiple lamp applications.
Figure 5A - PW M Brightness Control
% &'(!' )
The LXM1615-03-xx output current can be adjusted lower
by changing the value of one resistor (R10) on the PCB.
The following table shows the new output current values:
4.0mArms
3.5mArms
3.0mArms
2.5mArms
2.0mArms
137K 1% (stock setting)
95.3K1%
68.1K1%
49.9K1%
36.5K1%
CN1
F1
R1
R2
R3
R4
C7
R5
C9
R6
C8
C10
R8
C4
U1
D1
C13
C14
C15
C16
C17
R11 R10
R18
R19
Preliminary Data – Information contained in this document is pre-production data and is proprietary to LinFinity. It
may not be modified in any way without the express written consent of LinFinity. Product referred to herein is offered
in sample form only and LinFinity reserves the right to change or discontinue this proposed product at any time.
Copyright © 2000
Rev. 0.3d,2000-11-30
Microsemi
Linfinity Microelectronics Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 5
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