LXMG1612-05-02 Microsemi Analog Mixed Signal Group, LXMG1612-05-02 Datasheet - Page 5

• Manufacturer Part Number: LXMG1612-05-02
• Description: MOD INVERTER CCFL DIGITAL SGL 5V
• Manufacturer: Microsemi Analog Mixed Signal Group
• Series: LXMG1612-12-xxr
• Type: Inverters for CCFL and UV Lampsr

Specifications of LXMG1612-05-02

• Voltage - Input: 5.0V
• Output: 1800V
• Size / Dimension: 4.96" L x 0.63" W x 0.31" H (126mm x 16mm x 8mm)
• Mounting Type: Chassis Mount
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Copyright © 2000
Rev. 1.1, 2006-09-05
Highlights
The LXMG1612-05 output current can be adjusted by changing the
value of two resistors on the PCB. The following table shows the
approximate new output current values:
TM
Integrated brightness control circuit includes a DC voltage
to pulse width converter that minimizes system design
work and system noise susceptibility. This 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
disturbances caused by beat frequencies between the lamps
and video frame rates.
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.
0V
Output Current
provides
DAC or
Pot
10k
0 < P.W. < 100% of period
Figure 5 - Potentiometer Brightness Control
7.0mA
6.0mA
5.8mA
5.0mA
4.0mA
3.0mA
R
5V
V
SYNC
Figure 5A - PWM Brightness Control
PWM Signal
from System
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: [phone]
BRITE
BRITE RTN
SLEEP
2ms
P.W.
operation
LXMG1612-05-xx
L X M G 1 6 1 2 - 0 5 - X X O U T P U T C U R R E N T A D J U S T
V
2.00K 1%
2.61K 1%
2.74K 1%
2.74K 1%
2.74K 1%
2.74K 1%
V
SYNC
5V
IN1
R12
In this synchronous mode, the
LXMG1612-05-xx
H O W R A N G E M A X W O R K S ( C O N T I N U E D )
BRITE
with
GND
V
V
78.7K 1%
LO
Not Used
Not Used
Not Used
499K 1%
178K 1%
no
HI
R16
T Y P I C A L A P P L I C A T I O N
visible
CCFL
TUBE
Integrated Products
®
Microsemi
display
5V Highly-Integrated, Digital Dimming CCFL Inverter Module
oscillator operates the inverter burst rate at about 250Hz. 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.
vertical sync pulses at any pulse width.
voltage regulation insure reliable strike under all operating
conditions, automatic over-voltage prevention with broken
or failed lamps, and accurate lamp current regulation.
In applications with no access to a vertical sync., an onboard
A single input will accommodate negative and positive
Separate feedback loops for lamp current and open circuit
The brightness control may be a voltage output DAC, digital
resistor or a simple 10k potentiometer.
additional series resistor with the 10k potentiometer can be
used to set a higher minimum brightness setting 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
connect V
If you need to turn the inverter ON/OFF remotely, connect
to 2.5V to 5V logic signal to the SLEEP input.
Connect V
V
Never connect V
current regulation. If both lamp wires have heavy high
voltage insulation, connect the longest wire to V
wire is typically white.
R20
R41
C7
R21
U4
R30
LO
to the low voltage wire (wire with thinner insulation).
Figure 6
SYNC
R38
R39
R33
be
P
C21
SYNC
RODUCTION
HI
input. If no video synchronization is desired,
R34
acceptable
to high voltage wire from the lamp. Connect
-
to ground.
Component Replacement Locations
LO
C6
R2
C5
C4
R4
to circuit ground as this will defeat lamp
C3
C8
R5
R6
R3
D
for
ATASHEET
U1
C2
C9
many
LXMG1612-05-xx
R7
R16
R10
C11
C12
R11
C14
C13
applications,
C15
If desired, an
R12
C10
R15
LO
R14
C16
. This
R13
but
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