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ATASHEET
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Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1
Copyright © 2007
Rev. 1.0, 2007-09-28
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PanelMatch™ LXMG1617A-05-6x
5V 6W CCFL Programmable Inverter Module
TM ®
DESCRIPTION
The LXMG1617A-05-6x is a Single
Output 6W Direct Drive™ CCFL (Cold
Cathode Fluorescent Lamp) Inverter
Module designed for driving LCD
backlight lamps. It is typically ideal for
driving 12.1” to 15” TFT panels.
LXMG1617A modules provide the
designer with a superior display brightness
range. This brightness range is achievable
with virtually any LCD display.
The maximum output current is
externally programmable over a range of 5
to 8mA in 1mA steps to allow the inverter
to properly match to a wide array of LCD
panel lamp current specifications. The
modules include a dimming input that
permits brightness control from a DC
voltage source, a PWM signal or an
external potentiometer.
The resultant “burst drive” that
energizes the lamp was designed to ensure
that no premature lamp degradation
occurs, while allowing significant power
savings at lower dim levels.
The module converts a DC voltage
from the system battery or AC adapter
directly to high frequency, high-voltage
waves required to ignite and operate
CCFL lamps. A 12V input inverter is also
available (LXMG1617A-12-6x).
The LXMG1617A modules integrate
the newer highly integrated LX1691B
CCFL backlight controller to provide
wider dimming range (typically 100:1+)
and wider temperature range (-30°C to
80°C) compared to the existing solutions
offered by Microsemi.
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.
The new LXMG1617A (“A Series”)
modules are designed therefore as a
higher performance near drop-in-
replacement (see BRITE minimum input
voltage level) for those customers and
applications currently using the
LXMG1617 inverters.
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
KEY FEATURES
Externally Programmable
Maximum Output Current
Easy to Use Brightness Control
Fixed Frequency Operation
Output Short-Circuit Protection
and Automatic Strike-Voltage
Regulation and Timeout
RangeMAX Wide Range
Dimming
Rated From -30°C to 80°C
UL60950 E175910
RoHS Compliant
APPLICATIONS
Medical Instrument Displays
Portable Instrumentation
Desktop Displays
Industrial Display Controls
BENEFITS
Smooth, Flicker Free 2%-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
PRODUCT HIGHLIGHT
123
W
U
NIVERSAL DIMMING
INPUT
"PWM", VDC, OR POTENTIOMETER
DC Voltage
Source Potentiometer PWM
Signal
SELECTABLE MAXIMUM OUPUT
CURRENT 5MA TO 8MARMS
PACKAGE ORDER INFO
PART NUMBER OUTPUT CONNECTOR INVERTER MATES DIRECTLY TO
PANEL CONNECTORS
LXMG1617A-05-61 JST SM02(8.0)B-BHS-1-TB(LF)(SN), Yeon Ho 20015WR-05A00 or equivalent JST BHR-03VS-1
LXMG1617A-05-62 JST SM02B-BHSS-1-TB(LF)(SN), Yeon Ho 35001WR-02A00 or equivalent JST BHSR-02VS-1
L
LX
XM
MG
G1
16
61
17
7-
-0
05
5-
-6
6X
X
P
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ATASHEET
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
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Copyright © 2007
Rev. 1.0, 2007-09-28
WWW.Microsemi .COM
PanelMatch™ LXMG1617A-05-6x
5V 6W CCFL Programmable Inverter Module
TM ®
ABSOLUTE MAXIMUM RATINGS (NOTE 1)
Input Signal Voltage (VIN) .....................................................................................................................................-0.3V to 6.5V
Input Power .................................................................................................................................................................... 8.25W
Output Voltage, no load ............................................................................................................ Internally Limited to 1900VRMS
Output Current .............................................................................................................................10mARMS (Internally Limited)
Output Power ................................................................................................................................................................... 6.0W
Input Signal Voltage ( SLEEP Input) ....................................................................................................................-0.3V to 5.5V
Input Signal Voltage (BRITE) ...............................................................................................................................-0.3V to 5.5V
Ambient Operating Temperature, zero airflow.....................................................................................................-30°C to 80°C
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.
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.
Recommended Operating Conditions
Parameter Symbol
Min R.C. Max Units
Input Supply Voltage Range (Fully Regulated
Lamp Current) 4.75 5 5.25
Input Supply Voltage Range (Functional)
VIN
4.5 5 5.5
V
Output Power PO 6.0 W
Linear BRITE Control Input Voltage Range VBRT_ADJ 0¹ 2.0 V
Lamp Operating Voltage VLAMP 545 640 735* VRMS
Lamp Current (Full Brightness) IOLAMP 5 8 mARMS
Operating Ambient Temperature Range TA -30 80 °C
¹ The BRITE minimum input voltage level is 0V, whereas it is 0.5V in the original LXMG1617-05-6x inverter.
* Total output power must not exceed 6W. Higher voltage lamps may require maximum output current to be set lower than 8mARMS
ELECTRICAL CHARACTERISTICS
The following specifications apply over the recommended operating condition and ambient temperature of 0°C to 60°C except where
otherwise noted.
LXMG1617A-05-6x
Parameter Symbol Test Conditions Min Typ Max
Units
` OUTPUT PIN CHARACTERISTICS
Full Bright Lamp Current IL(MAX) VBRT_ADJ > 2.0VDC, SLEEP > 2.0V, VIN = 5VDC
ISET1 = Ground, ISET2 = Ground 4.4 5 5.6 mARMS
Full Bright Lamp Current IL(MAX) VBRT_ADJ > 2.0VDC, SLEEP > 2.0V, VIN = 5VDC
ISET1 = Ground, ISET2 = Open 5.4 6 6.6 mARMS
Full Bright Lamp Current IL(MAX) VBRT_ADJ > 2.0VDC, SLEEP > 2.0V, VIN = 5VDC
ISET1 = Open, ISET2 = Ground 6.4 7 7.6 mARMS
Full Bright Lamp Current IL(MAX) VBRT_ADJ > 2.0VDC, SLEEP > 2.0V, VIN = 5VDC
ISET1 = Open, ISET2 = Open 7.4 8 8.6 mARMS
Min. Average Lamp Current
IL(MIN) VBRT_ADJ = 0VDC, SLEEP > 2.0V, VIN = 5VDC
ISET1 = ISET2 = Gnd IL(MIN) = IL(MAX) * √(Min Duty Ratio) 0.6 mARMS
Lamp Start Voltage VLS -30°C < TA < 80°C, VIN > 4.5VDC 1500 1650 VRMS
Operating Frequency fO VBRT_ADJ = 2.0VDC, SLEEP > 2.0V, VIN = 5V 57 60 63 kHz
Burst Frequency fBURST Output Burst Frequency 222 234 246 Hz
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ATASHEET
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 3
Copyright © 2007
Rev. 1.0, 2007-09-28
WWW.Microsemi .COM
PanelMatch™ LXMG1617A-05-6x
5V 6W CCFL Programmable Inverter Module
TM ®
ELECTRICAL CHARACTERISTICS (CONTINUED)
Unless otherwise specified, the following specifications apply over the recommended operating condition and ambient temperature of
0°C to 60°C except where otherwise noted.
LXMG1617A-05-6x
Parameter Symbol Test Conditions Min Typ Max
Units
` BRITE INPUT
VBRT_ADJ = 0VDC -13 µADC
Input Current IBRT VBRT_ADJ = 3VDC 0 µADC
Minimum Input for Max. Lamp Current VBRT_ADJ I
O(LAMP) = Maximum Lamp Current 1.9 2 VDC
Maximum Input for Min. Lamp Current² VBRT_ADJ I
O(LAMP) = Minimum Lamp Current 0 VDC
Minimum PWM Input Frequency FBRT_PWM 2 kHz
` SLEEP BAR INPUT
RUN Mode SLEEP
V 2.0 VIN V
DC
SLEEP Mode SLEEP
V -0.3 0.8 VDC
` SET1,2 INPUT
SET1,2 Low Threshold V
L 0.4 V
Input Current ISET V
SET = 0V -220 µA
` POWER CHARACTERISTICS
Sleep Current IIN(MIN) VIN = 5VDC, SLEEP < 0.8V 5 50 µADC
Run Current IRUN VIN = 5VDC, SLEEP ≥ 2.0V, ISET1 = Open
ISET2 = Ground, VLAMP = 640VRMS 1090 mADC
Run Current Ripple Voltage IRIPPLE VIN = 5V, SLEEP ≥ 2.0V, ISET1 = Open
ISET2 = Ground, VLAMP = 640VRMS 330 mVpp
Efficiency η VIN = 5VDC, SLEEP ≥ 2.0V, ISET1 = Open
ISET2 = Ground, VLAMP = 640VRMS 85 %
² The BRITE minimum input voltage level is 0V, whereas it is 0.5V in the original LXMG1617-05-6x inverter.
FUNCTIONAL PIN DESCRIPTION
CONN PIN DESCRIPTION
CN1 (Molex 53261-0871) Mates with 51021-0800 housing, 50079-8100 pins. Mates with LX9501G input cable assembly
CN1-1
CN1-2 VIN Main Input Power Supply (4.75V < VIN < 5.25V)
CN1-3
CN1-4 GND Power Supply Return
CN1-5 SLEEP ON/OFF Control. (0V < SLEEP ≤ 0.8 = OFF, SLEEP ≥ 2.0V = ON
CN1-6 BRITE Brightness Control (0V to 2.0VDC). 2.0VDC gives maximum lamp current.
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 for LXMG1617A-05-61 and -62 (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
CN2-1 VHI High voltage connection to high Side of lamp. Connect to lamp terminal with shortest lead length.
DO NOT connect to Ground.
CN2-2 VLO Connection to low side of lamp. Connect to lamp terminal with longer lead length.
DO NOT connect to Ground
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ATASHEET
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 4
Copyright © 2007
Rev. 1.0, 2007-09-28
WWW.Microsemi .COM
PanelMatch™ LXMG1617A-05-6x
5V 6W CCFL Programmable Inverter Module
TM ®
TABLE 1 SETTING OUTPUT CURRENT
OUTPUT CURRENT SETTINGS
SET1
(Pin 7) SET2
(Pin 8) Nominal Output Current
Open* Open* 8.0mA
Open* Ground 7.0mA
Ground Open* 6.0mA
Ground Ground 5.0mA
* If driven by a logic signal it should be open collector or open drain only, not a voltage source.
PHYSICAL DIMENSIONS
LXMG1617A-05-6X
1.0mm ±0.1
0.0394in.
Weight: (9g) typ.
7.5mm Max
0.295in.
100mm
3.94in.
GROUNDED MOUNTING
HOLE 2.44MM ±.08 DIA.
CN1
CN2
11mm
0.433in.
3.5mm
0.138in.
16mm
0.63in.
85mm
3.35in
12.5mm
0.492in
X
MOUNTING HOLE
2.44MM ±.08
DIA.
PCB tolerances ± 0.5mm , M2 or 2-56 recommended mounting screws
74mm ±0.2mm
2.91in
R1.0
9mm ±0.2
0.354in.
X
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
All dimensions are in millimeters, inches for reference only
SIMPLIFIED BLOCK DIAGRAM
Ramp
Gen
Transformer
Driver
0 to 2V
DC
+
-
LAMP
VLO
VHI
Comparator
Ramp
VBRITE
SET 1
High
Voltage
Transformer
ISENSE
OVSENSE
SET 2
10k
+3V
+3V
VIN
OC SENSE
10k
Controller
+3V
215k
10.0k
P
PA
AC
CK
KA
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P
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D
ATASHEET
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 5
Copyright © 2007
Rev. 1.0, 2007-09-28
WWW.Microsemi .COM
PanelMatch™ LXMG1617A-05-6x
5V 6W CCFL Programmable Inverter Module
TM ®
TYPICAL APPLICATION
LXMG1617A-05-6x
5V
SET2GND
VHI
VLO
BRITE VIN
SLEEP
SET1
0V to
2.0V 500k
DAC or
Pot
CCFL
TUBE
NC NC
Figure 1 – Brightness Control
(output current set to maximum)
P.W.
10µs to 500µS
BRITE
LXMG1617A-05-6x
0 < P.W. < 100% of period
PWM Signal
from System
Figure 1A – PWM Brightness Control
LXMG1617A-05-6x
SET2GND
VHI
VLO
SLEEP
SET1
CCFL
TUBE
BRITE
5V
VIN
L L 5.0mARMS
L H 6.0mARMS
H L 7.0mARMS
H H 8.0mARMS
L=GND; H=Open
Figure 2 – Max Output Current
(SET1 and SET2 Inputs)
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, if desired; add a resistor to set the lower threshold
voltage above the absolute minimum dim level capability.
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 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.
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
manufactures 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.
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 user’s
responsibility since not all lamps are designed to be
overdriven.
The inverter has a built in fault timeout function. If the
output is open (lamp disconnected or broken) or shorted
the inverter will attempt to strike the lamp up to about one
second, 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.
A
AP
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ON
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P
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D
ATASHEET
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 6
Copyright © 2007
Rev. 1.0, 2007-09-28
WWW.Microsemi .COM
PanelMatch™ LXMG1617A-05-6x
5V 6W CCFL Programmable Inverter Module
TM ®
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.
N
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