MICROSEMI LXMG1617A-12-42

PanelMatch™ "A Series"
®
TM
LXMG1617A-12-4x
12V 4W CCFL Programmable Inverter Module
P RODUCTION D ATASHEET
KEY FEATURES
DESCRIPTION
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 5V input inverter is also
available (LXMG1617A-05-4x).
The LXMG1617A modules contain
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 and Burst Frequency) 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
ƒ Externally Programmable
Maximum Output Current
ƒ Easy to Use Brightness
Control
ƒ Output Short-Circuit Protection
and Automatic Strike-Voltage
Regulation and Timeout
ƒ RangeMAX Wide Range
Dimming (typ. 100:1+)
ƒ Fixed Frequency Operation
ƒ Rated From -30°C to 80°C
ƒ UL60950 E175910
ƒ RoHS Compliant
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The LXMG1617A-12-4x™ is a Single
Output 4W Direct Drive™ CCFL (Cold
Cathode Fluorescent Lamp) Inverter
Module designed for driving LCD
backlight lamps. It is ideal for driving
typically 8.4” to 12.1” 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
5mA to 6.5mA in 0.5mA steps
(PanelMatch) 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.
APPLICATIONS
ƒ Medical Instrument Displays
ƒ Portable Instrumentation
ƒ Industrial Display Controls
BENEFITS
ƒ Smooth, Flicker Free FullRange Brightness Control
ƒ Programmable Output Current
Allows Inverter to Mate with a
Wide Variety of LCD Panel’s
Specifications
ƒ Output Open Circuit Voltage
Regulation Minimizes Corona
Discharge For High Reliability
PRODUCT HIGHLIGHT
UNIVERSAL DIMMING INPUT
"PWM", VDC, OR POTENTIOMETER
Potentiometer
PWM
Signal
2
1
W
SELECTABLE MAXIMUM OUPUT CURRENT
5MARMS TO 6.5MARMS
PACKAGE ORDER INFO
PART NUMBER
OUTPUT CONNECTOR
INVERTER MATES DIRECTLY
TO PANEL CONNECTORS
LXMG1617A-12-41
LXMG1617A-12-42
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 © 2007
Rev. 1.1, 2010-02-26
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, 800-877-6458, Fax: 714-893-2570
Page 1
LXMG1617A-12-4X
3
DC Voltage
Source
PanelMatch™ "A Series"
®
TM
LXMG1617A-12-4x
12V 4W CCFL Programmable Inverter Module
P RODUCTION D ATASHEET
Input Signal Voltage (VIN) ......................................................................................................................................-0.3V to 15V
Input Power ...................................................................................................................................................................... 5.5W
Output Voltage, no load ............................................................................................................ Internally Limited to 1600VRMS
Output Current ............................................................................................................................7.5mARMS (Internally Limited)
Output Power ................................................................................................................................................................... 4.0W
Input Signal Voltage ( SLEEP Input) ...................................................................................................................... -0.3V to VIN
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.
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ABSOLUTE MAXIMUM RATINGS (NOTE 1)
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
Linear BRITE Control Input Voltage Range¹
Lamp Operating Voltage
Lamp Current (Full Brightness)
Operating Ambient Temperature Range
VIN
PO
VBRT_ADJ
VLAMP
IOLAMP
TA
Recommended Operating Conditions
Min
R.C.
Max
10.8
12
13.2
10.2
12
3.5
13.8
4.0
2.0
635*
6.5
80
0
465
5
-30
550
Units
V
W
V
VRMS
mARMS
°C
¹ The BRITE minimum input voltage level is 0V, whereas it is 0.5V in the original LXMG1617-12-4x inverter, see application info on page 5.
* Total output power must not exceed 4W. Higher voltage lamps may require maximum output current to be set lower than 6.5mARMS
ELECTRICAL CHARACTERISTICS
The following specifications apply over the recommended operating condition and ambient temperature of 0°C to 60°C except where
otherwise noted.
Parameter
`
Symbol
Test Conditions
LXMG1617A-12-4x
Min
Typ
Max
Units
OUTPUT PIN CHARACTERISTICS
IL(MAX)
Full Bright Lamp Current
IL(MAX)
Full Bright Lamp Current
IL(MAX)
Full Bright Lamp Current
IL(MAX)
Min. Average Lamp Current
Lamp Start Voltage
Operating Frequency
Burst Frequency²
IL(MIN)
VLS
fO
fBURST
VBRT_ADJ ≥ 2.0V, SLEEP ≥ 2.0V, VIN = 12V
ISET1 = Ground, ISET2 = Ground
VBRT_ADJ ≥ 2.0V, SLEEP ≥ 2.0V, VIN = 12V
ISET1 = Ground, ISET2 = Open
VBRT_ADJ ≥ 2.0V, SLEEP ≥ 2.0V, VIN = 12V
ISET1 = Open, ISET2 = Ground
VBRT_ADJ ≥ 2.0V, SLEEP ≥ 2.0V, VIN = 12V
ISET1 = Open, ISET2 = Open
VBRT_ADJ = 0V, SLEEP ≥ 2.0V, VIN = 12V
ISET1 = ISET2 = Gnd IL(MIN) = IL(MAX) * √(Min Duty Ratio)
-30°C < TA < 80°C, VIN > 10.8V
VBRT_ADJ = 2.0V, SLEEP ≥ 2.0V, VIN = 12V
Output Burst Frequency
4.5
5
5.5
mARMS
5.0
5.5
6.0
mARMS
5.5
6
6.5
mARMS
6.0
6.5
7.0
mARMS
0.56
mARMS
1300
1450
76
80
83
VRMS
kHz
297
313
328
Hz
² The Burst Frequency of the LXMG1617A-12-4x is twice that of the original LXMG1617-12-4x inverter.
Copyright © 2007
Rev. 1.1, 2010-02-26
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, 800-877-6458, Fax: 714-893-2570
Page 2
ELECTRICALS
Full Bright Lamp Current
PanelMatch™ "A Series"
®
TM
LXMG1617A-12-4x
12V 4W CCFL Programmable Inverter Module
P RODUCTION D ATASHEET
The following specifications apply over the recommended operating condition and ambient temperature of 0°C to 60°C except where
otherwise noted.
Parameter
`
Symbol
`
`
LXMG1617A-12-4x
Min
Typ
Max
Units
-13
0
µA
µA
BRITE INPUT
Input Current
`
Test Conditions
IBRT
VBRT_ADJ = 0V
VBRT_ADJ = 3V
Minimum Input for Max. Lamp Current
VBRT_ADJ
IO(LAMP) = Maximum Lamp Current
Maximum Input for Min. Lamp Current³
VBRT_ADJ
IO(LAMP) = Minimum Lamp Current
Minimum PWM Input Frequency
1.9
2.0
V
0
V
FBRT_PWM
2
kHz
RUN Mode
VSLEEP
2.0
V
SLEEP Mode
VSLEEP
-0.3
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ELECTRICAL CHARACTERISTICS (CONTINUED)
SLEEP BAR INPUT
0.8
V
SET1,2 INPUT
SET1,2 Low Threshold
VL
Input Current
ISET
VSET = 0V
0
V
-540
µA
POWER CHARACTERISTICS
Sleep Current
IIN(MIN)
Run Current
IRUN
Run Current Ripple Voltage
IRIPPLE
η
Efficiency
8
VIN = 12V, SLEEP ≤ 0.8V
VIN = 12V, SLEEP ≥ 2.0V, ISET1 = Open
ISET2 = Ground, VLAMP = 550VRMS
VIN = 12V, SLEEP ≥ 2.0V, ISET1 = Open
ISET2 = Ground, VLAMP = 550VRMS
VIN = 12V, SLEEP ≥ 2.0V, ISET1 = Open
ISET2 = Ground, VLAMP = 550VRMS
20
µA
330
mA
375
mVpp
85
%
³ The BRITE minimum input voltage level is 0V, whereas it is 0.5V in the original LXMG1617-12-4x inverter, see application info on page 5.
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
CN1-2
CN1-3
CN1-4
VIN
GND
Main Input Power Supply (10.8V ≤ VIN ≤ 13.2V)
Power Supply Return
SLEEP
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)
ON/OFF Control. (0V < SLEEP ≤ 0.8 = OFF, SLEEP ≥ 2.0V = ON
Brightness Control (0V to 2.0V). 2.0V gives maximum lamp current.
CN2 for LXMG1617A-12-41 and -42 (JST SM02(8.0)B-BHS-1-TB (LF)(SN) | Yeon Ho 20015WR-05A00 or SM02B-BHSS-1TB (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
Copyright © 2007
Rev. 1.1, 2010-02-26
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, 800-877-6458, Fax: 714-893-2570
Page 3
ELECTRICALS
CN1-5
PanelMatch™ "A Series"
®
TM
LXMG1617A-12-4x
12V 4W CCFL Programmable Inverter Module
P RODUCTION D ATASHEET
WWW . Microsemi .C OM
TABLE 1
OUTPUT CURRENT SETTINGS
SET1
(Pin 7)
Open*
Open*
Ground
Ground
SET2
(Pin 8)
Open*
Ground
Open*
Ground
Nominal Output Current
6.5mA
6.0mA
5.5mA
5.0mA
* If driven by a logic signal it should be open collector or open drain only, not a voltage source.
PHYSICAL DIMENSIONS
LXMG1617A-12-4X
86mm
71mm
3.39in.
MOUNTING HOLE
2.44MM ±0.08 DIA.
2.80in.
CN1
X
16mm
3.5mm
0.63in.
0.138in.
9mm
±0.2mm
12.5mm
0.354in.
0.492in.
Warning
High Voltage is present at high
side of transformer, its core
and the high side of the output
connector, please provide at
least 2 mm clearance (in all
directions) on the component
side of the board to any
conductor when mounting
CN2
W
60mm ± 0.2mm
GROUNDED MOUNTING
HOLE 2.44MM ±0.08
11mm
DIA.
2.36in.
0.433in.
0.8mm ±0.1mm
0.0315in.
6.2mm Max
0.244in.
Weight: (7g) typ.
R1.0
PCB tolerances ± 0.5mm, M2 or 2-56 recommended mounting screws
All dimensions are in millimeters, inches are reference only
SIMPLIFIED BLOCK DIAGRAM
High Voltage
Transformer
Controller
215k
Comparator
VBRITE
+
0V to
2V
10.0k
Ramp
1µF
-
Ramp
Gen
V IN
OCSENSE
PACKAGE DATA
+5V
Transformer
Driver
VHI
LAMP
+3V
10k
SET1
SET2
Copyright © 2007
Rev. 1.1, 2010-02-26
+5V
10k
OVSENSE
ISENSE
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, 800-877-6458, Fax: 714-893-2570
VLO
Page 4
PanelMatch™ "A Series"
®
TM
LXMG1617A-12-4x
12V 4W CCFL Programmable Inverter Module
P RODUCTION D ATASHEET
12V
DAC or
Pot
0V to
2.0V
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 PWM logic
level signal (figure 1A) may be used up to 5V; however the
inverter will reach maximum current at less than 100% duty
cycle. This can be calculated as approximately 2V divided by
the logic high voltage level; with 3.3V logic level this
corresponds to about 60% duty cycle for maximum lamp
current.
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
manufacturer’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, 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.
ƒ
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.
VIN
BRITE
VHI
500k
LXMG1617A-12-4x
SLEEP
SET1
SET2
GND
CCFL
TUBE
VLO
NC
NC
Figure 1 – Brightness Control
(Output current set to maximum)
PWM Signal
from System
BRITE
P.W.
LXMG1617A-12-4x
10µs to 500µS
0 < P.W. < 100% of period
Figure 1A – PWM Brightness Control
12V
VIN
BRITE
VHI
CCFL
TUBE
LXMG1617A-12-4x
SLEEP
SET1
L
L
H
H
SET2
GND
VLO
L
5.0mARMS
H
5.5mARMS
L
6.0mARMS
H
6.5mARMS
L=GND; H=Open
Figure 2 – Max Output Current
(SET1 and SET2 Inputs)
Copyright © 2007
Rev. 1.1, 2010-02-26
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, 800-877-6458, Fax: 714-893-2570
Page 5
APPLICATION
ƒ
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TYPICAL APPLICATION
PanelMatch™ "A Series"
TM
®
LXMG1617A-12-4x
12V 4W 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 © 2007
Rev. 1.1, 2010-02-26
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, 800-877-6458, Fax: 714-893-2570
Page 6