PanelMatch™
TM
®
LXMG1626-12-67
12V 10W Dual CCFL Programmable Inverter Module
P
RODUCTION
D
ATA
S
HEET
DESCRIPTION
KEY FEATURES
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Microsemi
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OM
The LXMG1626-12-67¹ is a 10W dual
Output
Direct Drive™
CCFL (Cold Cathode
Fluorescent
Lamp)
Inverter
Module
specifically designed to be compatible with a
variety of LCD panels the have both lamps
on one side of the panel and use a single
common lamp return wire.
LXMG1626 modules provide the
designer with a vastly superior display
brightness range. This brightness range is
achievable with virtually any LCD display.
The modules are available with a
dimming input that permits brightness
control from a Direct Current voltage source,
a PWM signal, or external Potentiometer.
The maximum output current is
externally programmable (through the input
connector) over a range of 10 to 14mA in
steps. This allows the inverter to match the
panel’s lamp current specifications, or it can
be used to purposely drive the lamps at a
lower or higher current to decrease or
increase nominal brightness.
RangeMAX™ Digital Dimming Technique
provides flicker-free brightness control in any
wide range typically (100:1+) dimming
application.
The design of the resultant “burst drive”
that energizes the lamp specifically ensures
that no premature lamp degradation occurs,
while allowing significant power savings at
lower dim levels.
The modules convert DC voltage from
the system battery or AC adapter directly to
high frequency, high-voltage waves
required to ignite and operate CCFL lamps.
The
modules
design
utilizes
Microsemi’s LX1691B backlight controller,
which provides a number of cost and
performance advantages due to the
controller’s high level of integration. A 5V
input supply version (LXMG1626-05-67) is
also available.
Other benefits of this new topology are
stable
fixed-frequency
operation,
secondary-side strike-voltage regulation and
both open/shorted lamp protection with
fault timeout.
Externally Programmable
Maximum Output Current
Easy to Use Brightness Control
RangeMAX™ Wide Range
Dimming
Output Open & Short-Circuit
Protection and Automatic Strike-
Voltage Regulation and Timeout
Fixed Frequency Operation
Rated From -20 to 70°C
UL60950 E175910
RoHS Compliant
APPLICATIONS
Dual Lamp LCD’s Requiring a
Shared Common Lamp Return
Mates to a single JST BHR-
04VS-1 Lamp Connector
Desktop Displays
Industrial Display Controls
BENEFITS
Smooth, Flicker Free 1%-100%
Full-Range Brightness Control
Programmable Output Current
Allows Inverter to Mate With a
Wide Variety of LCD Panel’s
Specifications
Output Open Circuit Voltage
Regulation Minimizes Corona
Discharge For High Reliability
IMPORTANT:
For the most current data, consult
MICROSEMI’s
website:
http://www.microsemi.com
¹
Protected by U.S. Patents 5,923,129; 5,930,121, 6,198, 234; Patents Pending
PRODUCT HIGHLIGHT
INPUT
DC Voltage
Source
Potentiometer
PWM
Signal
2
3
4
Microsemi
LXMG1626-12-67
LXMG1626-12-67
U
NIVERSAL
D
IMMING
I
NPUT
"PWM", V
DC
,
OR
P
OTENTIOMETER
Lamp Current 10 to 14mA in Steps
PACKAGE ORDER INFO
1
HI
P
ART
N
UMBER
LXMG1626-12-67
Copyright
©
2005
Rev. 1.0a, 2007-01-04
O
UTPUT
C
ONNECTOR
JST SM04(4.0)B-BHS-1-TB(LF)(SN) or Yeon Ho 20015WR-07A00
I
NVERTER
M
ATES
D
IRECTLY
TO
P
ANEL
C
ONNECTORS
JST BHR-04VS-1
Page 1
HI
Microsemi
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
PanelMatch™
TM
®
LXMG1626-12-67
12V 10W Dual CCFL Programmable Inverter Module
P
RODUCTION
D
ATA
S
HEET
ABSOLUTE MAXIMUM RATINGS
(NOTE 1)
Input Signal Voltage (V
IN1
).....................................................................................................................................-0.3V to 16V
Input Power ....................................................................................................................................................................... 14W
Output Voltage, no load ............................................................................................................ Internally Limited to 1800V
RMS
Output Current ............................................................................................................................7.5mA
RMS
(Internally Limited)
Output Power .................................................................................................................................................................... 10W
Input Signal Voltage (
SLEEP
Input) ..................................................................................................................... -0.3V to V
IN1
Input Signal Voltage (BRITE) ...............................................................................................................................-0.3V to 5.5V
Ambient Operating Temperature, zero airflow.....................................................................................................-20°C to 70°C
Operating Relative Humidity, non-condensing ................................................................................................................
≤
90%
Storage Temperature Range...............................................................................................................................-40°C to 85°C
Note 1: Exceeding these ratings could cause damage to the device. All voltages are with respect to ground. Currents are positive into, negative out of specified
terminal.
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OM
RECOMMENDED OPERATING CONDITIONS (R.C.)
This module has been designed to operate over a wide range of input and output conditions. However, best efficiency and performance
will be obtained if the module is operated under the condition listed in the ‘R.C.’ column. Min. and Max. columns indicate values beyond
which the inverter, although operational, will not function optimally.
Parameter
Input Supply Voltage Range (Fully Regulated
Lamp Current)
Input Supply Voltage Range (Functional)
Output Power
Linear BRITE Control Input Voltage Range
Lamp Operating Voltage
Lamp Current (Full Brightness)
Operating Ambient Temperature Range
Symbol
V
IN1
P
O
V
BRT_ADJ
V
LAMP
I
OLAMP
T
A
0
460
10
-20
Recommended Operating Conditions
Min
R.C.
Max
10.8
10.2
12
12
8
540
13.2
14.4
9
2.0
620
14
70
Units
V
W
V
V
RMS
mA
RMS
°C
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, the following specifications apply over the recommended operating condition and ambient temperature of
25°C except where otherwise noted.
Parameter
OUTPUT PIN CHARACTERISTICS
Full Bright Lamp Current (two lamps)
Full Bright Lamp Current (two lamps)
Full Bright Lamp Current (two lamps)
Full Bright Lamp Current (two lamps)
Output Current Lamp to Lamp
Deviation
Min. Average Lamp Current
Lamp Start Voltage
Operating Frequency
Burst Frequency
Copyright
©
2005
Rev. 1.0a, 2007-01-04
I
L(MAX)
I
L(MAX)
I
L(MAX)
I
L(MAX)
I
LL%DEV
I
L(MIN)
V
LS
f
O
f
BURST
V
BRT_ADJ
> 2.0V
DC
,
SLEEP
> 2.0V, V
IN1
= 12V
DC
I
SET1
= Ground, I
SET2
= Ground
V
BRT_ADJ
> 2.0V
DC
,
SLEEP
> 2.0V, V
IN1
= 12V
DC
I
SET1
= Ground, I
SET2
= Open
V
BRT_ADJ
> 2.0V
DC
,
SLEEP
> 2.0V, V
IN1
= 12V
DC
I
SET1
= Open, I
SET2
= Ground
V
BRT_ADJ
> 2.0V
DC
,
SLEEP
> 2.0V, V
IN1
= 12V
DC
I
SET1
= Open, I
SET2
= Open
V
BRT_ADJ
> 2.0V
DC
,
SLEEP
> 2.0V, V
IN1
= 12V
DC
I
SET1
= Open, I
SET2
= Open
V
BRT_ADJ
= 0V
DC
,
SLEEP
> 2.0V, V
IN1
= 12V
DC
I
SET1
= I
SET2
= GND; I
MIN
= I
MAX
*
√
of % Duty Cycle
-20°C < T
A
< 70°C, V
IN1
> 10.8V
DC
V
BRT_ADJ
= 2.0V
DC
,
SLEEP
> 2.0V, V
IN1
= 12V
Output Burst Frequency
8.8
10.3
11.3
12.3
10
11.5
12.8
14
5
1.4
1450
62
242
1600
65
254
68
266
11
12.5
13.8
15
mA
RMS
mA
RMS
Symbol
Test Conditions
LXMG1626-12-67
Min
Typ
Max
Units
E
LECTRICALS
E
LECTRICALS
mA
RMS
mA
RMS
%
mA
RMS
V
RMS
kHz
Hz
Microsemi
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 2
PanelMatch™
TM
®
LXMG1626-12-67
12V 10W Dual CCFL Programmable Inverter Module
P
RODUCTION
D
ATA
S
HEET
ELECTRICAL CHARACTERISTICS (CONTINUED)
Unless otherwise specified, the following specifications apply over the recommended operating condition and ambient temperature of
25°C except where otherwise noted.
Parameter
BRITE INPUT
Input Current
Minimum Input for Max. Lamp Current
Maximum Input for Min. Lamp Current
SLEEP INPUT
RUN Mode
SLEEP Mode
SET
1,2
INPUT
SET
1,2
Low Threshold
Input Current
POWER CHARACTERISTICS
Sleep Current
Run Current
Efficiency
I
IN(MIN)
I
IN(RUN)
η
V
IN1
= 12V
DC
,
SLEEP
< 0.8V
V
IN1
= 12V
DC
,
SLEEP
≥
2.0V, I
SET1
= Ground
I
SET2
= Open, V
LAMP
= 520V
RMS
V
IN1
= 12V
DC
,
SLEEP
≥
2.0V, I
SET1
= Ground
I
SET2
= Open, V
LAMP
= 520V
RMS
0.0
10
590
85
50
µA
DC
mA
DC
%
V
L
I
SET
V
SET
≤
0.4V
-300
0.4
V
µA
I
BRT
V
BRT_ADJ
V
BRT_ADJ
V
BRT_ADJ
= 0V
DC
V
BRT_ADJ
= 3V
DC
I
O(LAMP)
= Maximum Lamp Current
I
O(LAMP)
= Minimum Lamp Current
0
-13.2
1
2.0
2.05
µA
DC
µA
DC
V
DC
V
DC
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OM
Symbol
Test Conditions
LXMG1626-12-67
Min
Typ
Max
Units
V
SLEEP
V
SLEEP
2.1
-0.3
V
IN1
0.8
V
DC
V
DC
FUNCTIONAL PIN DESCRIPTION
C
ONN
CN1-1
CN1-2
CN1-3
CN1-4
CN1-5
CN1-6
CN1-7
CN1-8
CN2-1
CN2-2
CN2-3
CN2-4
P
IN
D
ESCRIPTION
CN1
(Molex 53261-0871) Mates with 51021-0800 housing, 50079-8100 pins. Mates with LX9501G input cable assembly
V
IN1
GND
Main Input Power Supply (10.8V < V
IN1
< 13.2V)
Power Supply Return
ON/OFF Control. (0V <
SLEEP
< 0.8 = OFF,
SLEEP
>= 2.1V = ON
Brightness Control (0V to 2.0V
DC
). 2.0V
DC
gives maximum lamp current.
SET
1
MSB Connecting this pin to ground decreases the output current (see Table 1)
SET
2
LSB Connecting this pin to ground decreases the output current (see Table 1)
SLEEP
BRITE
SET
1
SET
2
CN2 for LXMG1626-12-67
(JST SM04(4.0)B-BHS-1-TB(LF)(SN) or Yeon Ho 20015WR-07A00 )
V
HI1
V
HI2
NC
V
LO
High voltage connection to high Side of lamp. Connect to lamp terminal with shortest lead length.
DO NOT
connect to ground.
High voltage connection to high Side of lamp. Connect to lamp terminal with shortest lead length.
DO NOT
connect to ground.
No Connect
Connection to low side of lamp. Connect to lamp terminal with longer lead length.
DO NOT
connect to ground
E
LECTRICALS
E
LECTRICALS
Copyright
©
2005
Rev. 1.0a, 2007-01-04
Microsemi
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 3
PanelMatch™
TM
®
LXMG1626-12-67
12V 10W Dual CCFL Programmable Inverter Module
P
RODUCTION
D
ATA
S
HEET
TABLE 1
OUTPUT CURRENT SETTINGS
SET
1
(Pin 7)
Open*
Open*
Ground
Ground
SET
2
(Pin 8)
Open*
Ground
Open*
Ground
Nominal Output Current
14.0mA
12.8mA
11.5mA
10.0mA
PHYSICAL DIMENSIONS
LXMG1626-12-67
U
NPLATED
M
OUNTING
H
OLE
3MM ±.08
DIA
.
6MM HEAD CLEARANCE BOTH HOLES
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Microsemi
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OM
* If driven by a logic signal it should be open collector or open drain only, not a voltage source.
133mm
5.24in.
119mm
4.69in.
CN1
CN2
21mm
0.827in.
25mm
0.984in.
4.0mm
0.157in.
16mm
0.630in.
G
ROUNDED
M
OUNTING
H
OLE
3MM ±.08
DIA
.
1.0mm
0.0394in.
weight: 18g
7.5mm
0.295in.
Max
PCB tolerances ± 0.5mm , 4-40 recommended mounting screws
SIMPLIFIED BLOCK DIAGRAM
+3V
215K
V
BRITE
0 - 2V
DC
10K
10uF
Ramp
-
+3V
10K
SET
1
+3V
10K
Controller
Comparator
+
High Voltage
Transformer
V
IN1
V
HI1
V
HI2
Transformer
Driver
Ramp
Gen
LAMP
LAMP
P
ACKAGE
D
ATA
P
ACKAGE
D
ATA
OC
SENSE
OV
SENSE
I
SENSE
One of two
SET
2
V
LO
Copyright
©
2005
Rev. 1.0a, 2007-01-04
Microsemi
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 4
PanelMatch™
TM
®
LXMG1626-12-67
12V 10W Dual CCFL Programmable Inverter Module
P
RODUCTION
D
ATA
S
HEET
TYPICAL APPLICATION
12V
DAC or
Pot
BRITE
V
IN1
V
HI1
V
HI2
LXMG1626-12-67
WWW .
Microsemi
.C
OM
500K
The brightness control may be a voltage output DAC or
other voltage source, a digital pot or 500K manual pot. The
inverter contains an internal 215K pull-up to 3V to bias the
pot. A 3.3V Logic Level PWM signal from a micro-
controller may also be used as shown in Figure 1A.
If you need to turn the inverter ON/OFF remotely, connect
to TTL logic signal to the
SLEEP
input.
Connect V
HI1
and V
HI2
to high voltage wires from the
lamps. Connect V
LO
to the low voltage wire lamp return
(wire with thinner insulation). Never connect V
LO
to
circuit ground, as this will defeat lamp current regulation.
If both lamp wires have heavy high voltage insulation,
connect the longest wire to V
LO
. This wire is typically
white.
Use the SET
1
and SET
2
(see Figure 2) inputs to select the
desired maximum output current. Using these two pins in
combination allows the inverter to match a wide variety of
panels from different manufactures. Generally, the best
lamp lifetime correlates with driving the CCFL at the
manufactures nominal current setting. However, the SET
1
and SET
2
inputs allow the user the flexibility to adjust the
current to the maximum allowable output current to
increase panel brightness at the expense of some reduced
lamp life.
Although the SET pins are designed such that just leaving
them open or grounding them is all that is needed to set the
output current, they can also be actively set. Using an open
collector or open drain logic signal will allow you to
reduce the lamp current for situations where greater dim
range is required, as an example in nighttime situations. In
conjunction with a light sensor or other timer the panel
could be set to higher brightness (maximum output
current) for daytime illumination and lower brightness
(minimum or typical output current) at nighttime. Since
the dim ratio is a factor of both the burst duty cycle and the
peak output current, using this technique the effective dim
ratio can be increased greater than the burst duty cycle
alone. Conversely, the SET inputs could be used to
overdrive the lamp temporarily to facilitate faster lamp
warm up at initial lamp turn on. Of course, any possible
degradation on lamp life from such practices is the users
responsibility since not all lamps are designed to be
overdriven.
The inverter has a built in fault timeout function. If both
outputs are open (lamps disconnected or broken) or shorted
to ground the inverter will attempt to strike the lamp for
number of cycles. After about one to two seconds without
success the inverter, will shutdown. In order to restart the
inverter it is necessary to toggle the SLEEP input or cycle
the V
IN1
input supply.
SLEEP
SET
1
SET
2
NC
NC
GND
V
LO
Figure 1
– Brightness Control
(Output current set to maximum)
PWM Signal
from System
P.W.
5µs to 100µS
0 < P.W. < 100% of period
BRITE
LXMG1626-12-67
Figure 1A
– PWM Brightness Control
12V
BRITE
V
IN1
V
HI1
V
HI2
LXMG1626-12-67
SLEEP
SET
1
SET
2
GND V
LO
A
PPLICATION
A
PPLICATION
L
10.0mA
RMS
H
11.5mA
RMS
L
12.8mA
RMS
H
14.0mA
RMS
L=GND; H=Open
Figure 2
– Max Output Current
(SET
1
and SET
2
Inputs)
Copyright
©
2005
Rev. 1.0a, 2007-01-04
L
L
H
H
Microsemi
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 5
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