MICROSEMI LXMG1813-12-6XS

PanelMatch™ VEasyLIT™ LXMG1813-12-6xS
12V 6W CCFL Programmable Inverter Module
®
TM
P RODUCTION D ATASHEET
KEY FEATURES
DESCRIPTION
Automatic brightness control can
extend the life of the display and save
power (particularly important for battery
powered products).
For applications
needing full manual control of lamp
brightness (dimming) we recommend the
LXMG1813-12-6x (non-S), which does
not offer the light sensor input.
The maximum output current of the
inverter is externally programmable over
a range of 4mA to 7mA in 1mA steps to
allow the inverter to properly match
(PanelMatch™) to a wide array of LCD
panel lamp current specifications. For
lower input voltage requirements the
LXMG1811-05-6x or -6xS will work
from a 5V input supply.
Other benefits of the inverter’s
topology include stable fixed-frequency
operation, secondary-side strike voltage
regulation and both open/shorted lamp
protection with fault timeout.
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
Protected by U.S. Patents: 5,923, 129; 5,930,121; 6,198,234; Patents Pending
ƒ Automatic Lamp Dimming Using
External LXMG1800_LS Light
Sensor Board Assembly
ƒ Externally Programmable
Maximum Output Current
ƒ Wide Input Voltage Range
ƒ Fixed Frequency Operation
ƒ Output Short-Circuit Protection
and Automatic Strike-Voltage
Regulation and Timeout
ƒ RangeMAX Wide Range
Dimming (50:1+)
ƒ Rated From -30°C to 80°C
ƒ UL60950 Pending
ƒ RoHS Compliant
WWW . Microsemi .C OM
The LXMG1813-12-6xS is a Single
Output 6W CCFL (Cold Cathode
Fluorescent Lamp) Inverter Module
designed for the driving LCD backlight
lamps for panels in the range of 3.9” to
15”.
Utilizing the full-bridge drive topology
capabilities of the Microsemi’s highly
integrated LX1697 CCFL backlight
controller the inverter allows a wider input
voltage range (9V to 16.8V) and wider
lamp output voltage range 390V to 790V
compared to Microsemi’s existing Direct
Drive™ inverter solutions.
Also this ‘S’ version includes an
additional input connector which links the
inverter to a light sensor board (the
LXMG1800_LS).
So connected, the
inverter is capable of automatically
adjusting (VEasyLIT™) the brightness of
the LCD display to ambient lighting
conditions.
APPLICATIONS
ƒ Medical Instrument Displays
ƒ Portable Instrumentation
ƒ Desktop Displays
ƒ Industrial Display Controls
BENEFITS
ƒ Smooth, Flicker Free Full-Range
Brightness Control
ƒ Programmable Output Current
Allows Inverter to Mate with a
Wide Variety of LCD Panel’s
Specifications
ƒ
PRODUCT HIGHLIGHT
LXMG1813-12-6XS
1
2
3
VEASYLIT™ AUTOMATIC BRIGHTNESS
INPUT USING LXMG1800_LS
AMBIENT LIGHT SENSOR ASSEMBLY
W
SELECTABLE MAXIMUM OUPUT
CURRENT 4MARMS TO 7MARMS
PACKAGE ORDER INFO
PART NUMBER
OUTPUT CONNECTOR
INVERTER MATES DIRECTLY
TO PANEL CONNECTORS
LXMG1813-12-61S
LXMG1813-12-62S
JST SM02(8.0)B-BHS-1-TB(LF)(SN), Yeon Ho 20015WR-05A00 or equivalent
JST SM02B-BHSS-1-TB(LF)(SN), Yeon Ho 35001WR-02A00 or equivalent
JST BHR-03VS-1
JST BHSR-02VS-1
Copyright © 2008
Rev 1.0, 2008-11-14
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 800-877-6458, 714-898-8121, Fax: 714-893-2570
Page 1
PanelMatch™ VEasyLIT™ LXMG1813-12-6xS
12V 6W CCFL Programmable Inverter Module
®
TM
P RODUCTION D ATASHEET
ABSOLUTE MAXIMUM RATINGS
Input Signal Voltage ( SLEEP Input) ...................................................................................................................... -0.3V to VIN
Input Signal Voltage (ALS_IN) .............................................................................................................................-0.3V to 5.5V
Analog Output (ALS_VCC external load current) ............................................................................................................. -5mA
Ambient Operating Temperature, zero airflow.....................................................................................................-30°C to 80°C
Storage Temperature Range...............................................................................................................................-40°C to 85°C
Note:
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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Input Signal Voltage (VIN) ......................................................................................................................................-0.3V to 19V
Input Power ......................................................................................................................................................................... 8W
Output Voltage, no load ............................................................................................................................................ 1800VRMS
Output Current .......................................................................................................................................................... 7.5mARMS
Output Power ...................................................................................................................................................................... 6W
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, may not function optimally.
Parameter
Symbol
Input Supply Voltage Range (Fully Regulated
Lamp Current)
Input Supply Voltage Range (Functional)
Output Power
Lamp Operating Voltage
Lamp Current (Full Brightness)
Operating Ambient Temperature Range
Recommended Operating Conditions
Min
R.C.
Max
9
12
16.8
8.4
12
4.2
590
16.8
6.0
790
7
80
VIN
PO
VLAMP
IO(LAMP)
TA
390
4
-30
Units
V
W
VRMS
mARMS
°C
ELECTRICAL CHARACTERISTICS
The following specifications apply over the recommended operating condition and ambient temperature of 0°C to 60°C except where
otherwise noted; ALS_IN ≥ 2.3V, SLEEP ≥ 2.0V, VIN = 12V.
LXMG1813-12-6xS
Parameter
Symbol
Test Conditions
Units
Min
Typ
Max
`
OUTPUT PIN CHARACTERISTICS
IL(MAX)
SET1 = Ground, SET2 = Ground
3.5
4.0
4.5
mARMS
Full Lamp Current
IL(MAX)
SET1 = Ground, SET2 = Open
4.5
5.0
5.5
mARMS
Full Lamp Current
IL(MAX)
SET1 = Open, SET2 = Ground
5.5
6.0
6.5
mARMS
Full Lamp Current
IL(MAX)
SET1 = Open, SET2 = Open
6.5
7.0
7.5
mARMS
Full Lamp Current
IL(MAX)
VIN = 9 to 16.8V; SET1 = Open, SET2 = Ground
5.4
6.0
6.6
mARMS
Min. Average Lamp Current
IL(MIN)
ALS_IN ≤ 0.9V, SET1 = SET2 = Ground, BRITE =
floating; IL(MIN) = IL* √(Min Duty Ratio)
Lamp Start Voltage
Operating Frequency
Burst Frequency
Copyright © 2008
Rev 1.0, 2008-11-14
VLS
-30°C < TA < 80°C, VIN ≥ 8.4V
fO
fBURST
Output Burst Frequency
1.0
mARMS
1400
1600
49.8
53
56.2
kHz
195
208
220
Hz
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 800-877-6458, 714-898-8121, Fax: 714-893-2570
VRMS
Page 2
ELECTRICALS
Full Lamp Current
PanelMatch™ VEasyLIT™ LXMG1813-12-6xS
12V 6W CCFL Programmable Inverter Module
®
TM
P RODUCTION D ATASHEET
otherwise noted; ALS_IN ≥ 2.3V, SLEEP ≥ 2.0V, VIN = 12V.
Parameter
`
Symbol
BRTPOT
Potentiometer Min Impedance
`
LXMG1813-12-6xS
Min
Typ
Max
Units
BRITE INPUT
Potentiometer Max Impedance
`
Test Conditions
Full Lamp Current
400
500
kΩ
0
kΩ
Minimum Lamp Current
SLEEP BAR INPUT
RUN Mode
VSLEEP
2.0
VIN
V
SLEEP Mode
VSLEEP
-0.3
0.8
V
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ELECTRICAL CHARACTERISTICS (CONTINUED)
The following specifications apply over the recommended operating condition and ambient temperature of 0°C to 60°C except where
SET1,2 INPUT
SET1,2 Low Threshold
VL
Input Current
ISET
`
ALS (AMBIENT LIGHT SENSOR)
`
POWER CHARACTERISTICS
ALS_VCC
ALSVCC
Sleep Current
IIN(MIN)
Run Current
IRUN
Strike (Open Lamp)
0
VSETx = 0V
-510
-555
µA
4.8
5.1
5.5
V
SLEEP ≤ 0.8V
10
20
SET1 = Open SET2 = Ground, VLAMP = 590VRMS
370
ILOAD = 3mA
TS_DWELL
Supply Current under Fault condition
IFAULT
η
Typical Efficiency
V
-475
1.5
Fault condition
SET1 = Open SET2 = Ground, VLAMP = 590VRMS
75
2
µA
mA
2.5
Sec
8
mA
80
%
FUNCTIONAL PIN DESCRIPTION
CONN
PIN
DESCRIPTION
CN1 (Molex 53261-0871 or equivalent) mates with 51021-0800 housing, 50079-8100 pins. Mates with LX9501G input cable assembly
CN1-1
VIN
Main Input Power Supply (9V ≤ VIN ≤ 16.8V)
CN1-2
CN1-3
GND
Power Supply Return
CN1-4
CN1-5
SLEEP
ON/OFF Control. (0V ≤
SLEEP ≤ 0.8V = OFF, SLEEP ≥ 2.0V = ON
CN1-6
BRITE
CN1-7
SET1
SET1 MSB Connecting this pin to ground decreases the output current (see Table 1)
CN1-8
SET2
SET2 LSB Connecting this pin to ground decreases the output current (see Table 1)
CN2 (Molex 53261-0371 or equivalent) mates with 51021-0800 housing, 50079-8100 pins. Mates with LXMG1800_LS ALS Assembly
CN2-1
ALS_VCC
CN2-2
ALS_IN
CN2-3
ASL_GND
Copyright © 2008
Rev 1.0, 2008-11-14
Nominal 5.1V Supply for ALS Board Assembly. 3mA maximum output load
Brightness Control Voltage input from light sensor board.
ALS Board Power Supply Return.
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 800-877-6458, 714-898-8121, Fax: 714-893-2570
Page 3
ELECTRICALS
Can be left open or connected to a 500k potentiometer to reduce brightness when the LXMG1800_LS is
connected to CN3. Not recommended as brightness control voltage input.
PanelMatch™ VEasyLIT™ LXMG1813-12-6xS
12V 6W CCFL Programmable Inverter Module
®
TM
P RODUCTION D ATASHEET
FUNCTIONAL PIN DESCRIPTION
PIN
DESCRIPTION
CN3 for LXMG1813-12-61S and -62S (JST SM02(8.0)B-BHS-1-TB(LF)(SN) ; Yeon Ho 20015WR-05A00, SM02B-BHSS-1-TB(LF)(SN) ; Yeon Ho
35001WR-02A00) or equivalent
CN3-1
VHI
High voltage connection to high side of lamp. Connect to lamp terminal with shortest lead length. DO NOT
connect to Ground.
CN3-2
VLO
Connection to low side of lamp. Connect to lamp terminal with longer lead length.
DO NOT connect to Ground
TABLE 1
OUTPUT CURRENT SETTINGS
SET1
(Pin 7)
Open*
Open*
Ground
Ground
SET2
(Pin 8)
Open*
Ground
Open*
Ground
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CONN
Nominal Output Current
7.0mA
6.0mA
5.0mA
4.0mA
* If driven by a logic signal it should be open collector or open drain only, not a voltage source.
PHYSICAL DIMENSIONS
LXMG1813-12-6xS
110mm
93.5mm
4.33in.
MOUNTING HOLE
3.18MM ±.08 DIA.
3.68in.
CN1
X
CN2
16mm
0.63in.
3.5mm
12.5mm
9mm ±0.2
0.492in
0.354in.
CN2
CN3
X
X
0.138in.
74mm ±0.2mm
19.5mm
0.768in.
GROUNDED MOUNTING
HOLE 3.18MM ±.08 DIA.
2.91in
Warning
High Voltage is present at high
side of transformer, its core
and the high side of the output
connector, please provide at
least 3 mm clearance (in all
directions) on the component
side of the board to any
conductor when mounting
1.0mm ±0.1
0.0394in.
6.0mm Max
0.236in.
R1.0
PCB tolerances ± 0.5mm , M3 recommended mounting screws
Weight: (9g) typ.
All dimensions are in millimeters, inches are for reference only
PACKAGE DATA
Copyright © 2008
Rev 1.0, 2008-11-14
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 800-877-6458, 714-898-8121, Fax: 714-893-2570
Page 4
PanelMatch™ VEasyLIT™ LXMG1813-12-6xS
12V 6W CCFL Programmable Inverter Module
®
TM
P RODUCTION D ATASHEET
SIMPLIFIED BLOCK DIAGRAM
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VIN
ALS_VCC
5.1V
ALS_IN
100k
0.1µF
402k
LAMP HI
BRITE
1M
2.2µF
Control
Circuitry
VIN
SLEEP
LAMP
+5.1V
10k
SET1
+5.1V
10k
OVSENSE
ISENSE
SET2
LAMP LO
VeasyLIT™ LXMG1800_LS APPLICATION
Key LXMG1800_LS
Features
Light Sensor board should
be mounted on the same
plane with LCD panel for
best results
BLOCK DIAGRAM
Small Size 9.5 x 31 x 2.5 mm
Flush Mount on Sensor Side
Board is Powered by Inverter
User Customizable Light Gain
Human Eye Light Response
Flexible Mounting Location
LXMG1800_LS
Copyright © 2008
Rev 1.0, 2008-11-14
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 800-877-6458, 714-898-8121, Fax: 714-893-2570
Page 5
PanelMatch™ VEasyLIT™ LXMG1813-12-6xS
12V 6W CCFL Programmable Inverter Module
®
TM
P RODUCTION D ATASHEET
TYPICAL APPLICATION
ƒ
If you need to turn the inverter ON/OFF remotely, connect
to TTL logic signal to the SLEEP input.
ƒ
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.
ƒ
Use the SET1 and SET2 (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 manufacturers. Generally the best
lamp lifetime correlates with driving the CCFL at the
manufacture’s nominal current setting. However the SET1
and SET2 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.
ƒ
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. 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 user’s responsibility since not all lamps are
designed to be overdriven.
ƒ
The inverter has a built-in fault timeout function. If the
output is open (lamp disconnected or broken) the inverter
will attempt to strike the lamp up to about two seconds,
after which (without success) the inverter will shutdown.
In this mode the inverter will draw about 8mA from VIN.
In order to restart the inverter it is necessary to toggle the
sleep input or cycle the VIN input supply.
12V
VHI
VIN
BRITE
500k
CCFL
TUBE
LXMG1813-12-6xS
SLEEP
SET1
SET2
NC
NC
GND VLO
Figure 1 – Brightness Control
(Output current set to maximum)
12V
VIN
BRITE
VHI
CCFL
TUBE
LXMG1813-12-6xS
SLEEP
SET1
SET2
GND
VLO
L
L
H
H
L
4.0mARMS
H
5.0mARMS
L
6.0mARMS
H
7.0mARMS
L=GND; H=Open
Figure 2 – Max Output Current
(SET1 and SET2 Inputs)
Copyright © 2008
Rev 1.0, 2008-11-14
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 800-877-6458, 714-898-8121, Fax: 714-893-2570
Page 6
APPLICATION
It is recommended to use LXMG1813-12-6xS only with
the LXMG1800_LS external light sensor assembly. A
500k potentiometer may be added to the inverter’s BRITE
input pin to allow a degree of manual override to the light
sensor. Adjustment of the potentiometer will only dim the
display further; it cannot increase the maximum brightness
level set by the light sensor. If full manual control of
dimming is required by the application we recommend the
use of the LXMG1813-12-6x (non-S) version.
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ƒ
PanelMatch™ VEasyLIT™ LXMG1813-12-6xS
TM
12V 6W CCFL Programmable Inverter Module
®
P RODUCTION D ATASHEET
NOTES
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NOTES
PRODUCTION DATA – Information contained in this document is proprietary to
Microsemi and is current as of publication date. This document may not be modified in
any way without the express written consent of Microsemi. Product processing does not
necessarily include testing of all parameters. Microsemi reserves the right to change the
configuration and performance of the product and to discontinue product at any time
Copyright © 2008
Rev 1.0, 2008-11-14
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 800-877-6458, 714-898-8121, Fax: 714-893-2570
Page 7