MICROSEMI LXMG1626-05-66

PanelMatch™
5V 10W Dual CCFL Programmable Inverter Module
®
TM
LXMG1626-05-66
P RODUCTION D ATASHEET
KEY FEATURES
DESCRIPTION
ƒ Externally Programmable
Maximum Output Current
ƒ Easy to Use Brightness Control
ƒ RangeMAX™ Wide Range
Dimming
ƒ Output Open & Short-Circuit
Protection and Automatic StrikeVoltage Regulation and Timeout
ƒ Fixed Frequency Operation
ƒ Rated From -20 to 70°C
ƒ RoHS Compliant
The 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
12V
input
supply
version
(LXMG1626-12-66) 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.
ƒ
APPLICATIONS
WWW . Microsemi .C OM
The LXMG1626-05-66 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:
A number of NEC and a few Optrex,
Prime View, Au Optronics, and other
panels that have both lamps on one side of
the panel and use a single common lamp
return wire with non standard output
polarity. 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 either: a DC 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.
ƒ Dual Lamp LCD’s Requiring a
Shared Common Lamp Return
ƒ Mates to a Single JST BHR03VS-1 Lamp Connector
ƒ Output Connector Polarity 1:low,
2:high, 3:high
ƒ Desktop Displays
ƒ Industrial Display Controls
BENEFITS
ƒ Smooth, Flicker Free 1%-100%
Full-Range 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
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
DC Voltage
Source
Potentiometer
PWM
Signal
INPUT
PRODUCT HIGHLIGHT
HI
HI
2
1
W
UNIVERSAL DIMMING INPUT
"PWM", VDC, OR POTENTIOMETER
Lamp current 10 to 14mA in steps
PACKAGE ORDER INFO
INVERTER MATES DIRECTLY
TO PANEL CONNECTORS
LXMG1626-05-66 JST SM03(4.0)B-BHS-1-TB(LF)(SN) or Yeon Ho 20015WR-05A00
JST BHR-03VS-1
PART NUMBER
Copyright © 2005
Rev. 1.0, 2006-01-13
OUTPUT CONNECTOR
Microsemi
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1
LXMG1626-05-66
3
Microsemi
PanelMatch™
5V 10W Dual CCFL Programmable Inverter Module
®
TM
LXMG1626-05-66
P RODUCTION D ATASHEET
Input Signal Voltage (VIN1)....................................................................................................................................-0.3V to 6.5V
Input Power ....................................................................................................................................................................... 14W
Output Voltage, no load ............................................................................................................ Internally Limited to 1800VRMS
Output Current ............................................................................................................................7.5mARMS (Internally Limited)
Output Power ................................................................................................................................................................... 10W
Input Signal Voltage ( SLEEP Input) ....................................................................................................................-0.3V to 5.5V
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.
WWW . Microsemi .C OM
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, will 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 Range
Lamp Operating Voltage
Lamp Current (Full Brightness)
Operating Ambient Temperature Range
VIN1
PO
VBRT_ADJ
VLAMP
IOLAMP
TA
Recommended Operating Conditions
Min
R.C.
Max
4.75
5
5.25
4.5
5
8
5.5
9
2.0
620*
14
70
0
460
10
-20
540
Units
V
W
V
VRMS
mARMS
°C
* At higher lamp voltages the maximum lamp current is limited to about 12mA @ VIN1 = 4.75V, lamp voltage is based on single lamp measurements
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
`
Symbol
Test Conditions
LXMG1626-05-66
Min
Typ
Max
Units
OUTPUT PIN CHARACTERISTICS
IL(MAX)
Full Bright Lamp Current (two lamps)
IL(MAX)
Full Bright Lamp Current ((two lamps)
IL(MAX)
Full Bright Lamp Current ((two lamps)
IL(MAX)
Output Current Lamp to Lamp
Deviation
ILL%DEV
Min. Average Lamp Current
(each output)
Lamp Start Voltage
Operating Frequency
Burst Frequency
Copyright © 2005
Rev. 1.0, 2006-01-13
IL(MIN)
VLS
fO
fBURST
VBRT_ADJ > 2.0VDC, SLEEP > 2.0V, VIN1 = 5VDC
ISET1 = Ground, ISET2 = Ground
VBRT_ADJ > 2.0VDC, SLEEP > 2.0V, VIN1 = 5VDC
ISET1 = Ground, ISET2 = Open
VBRT_ADJ > 2.0VDC, SLEEP > 2.0V, VIN1 = 5VDC
ISET1 = Open, ISET2 = Ground
VBRT_ADJ > 2.0VDC, SLEEP > 2.0V, VIN1 = 5VDC
ISET1 = Open, ISET2 = Open
VBRT_ADJ > 2.0VDC, SLEEP > 2.0V, VIN1 = 5VDC
ISET1 = Open, ISET2 = Open
VBRT_ADJ = 0VDC, SLEEP > 2.0V, VIN1 = 5VDC
ISET1 = ISET2 = GND; IMIN = IMAX * √ of % Duty Cycle
-20°C < TA < 70°C, VIN1 > 4.5VDC
VBRT_ADJ = 2.0VDC, SLEEP > 2.0V, VIN1 = 5V
Output Burst Frequency
8.8
10
11
mARMS
10.3
11.5
12.5
mARMS
11.3
12.8
13.8
mARMS
12.3
14
15
mARMS
5
%
1.4
mARMS
1350
1500
62
65
68
kHz
242
254
266
Hz
Microsemi
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
VRMS
Page 2
ELECTRICALS
Full Bright Lamp Current (two lamps)
PanelMatch™
®
TM
LXMG1626-05-66
5V 10W Dual CCFL Programmable Inverter Module
P RODUCTION D ATASHEET
Parameter
`
Symbol
`
`
LXMG1626-05-66
Min
Typ
Max
Units
-13.2
1
µADC
µADC
BRITE INPUT
Input Current
`
Test Conditions
IBRT
VBRT_ADJ = 0VDC
VBRT_ADJ = 3VDC
Minimum Input for Max. Lamp Current
VBRT_ADJ
IO(LAMP) = Maximum Lamp Current
Maximum Input for Min. Lamp Current
VBRT_ADJ
IO(LAMP) = Minimum Lamp Current
2.0
2.05
0
VDC
VDC
SLEEP INPUT
RUN Mode
VSLEEP
2.1
VIN1
VDC
SLEEP Mode
VSLEEP
-0.3
0.8
VDC
0.4
V
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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.
SET1,2 INPUT
SET1,2 Low Threshold
VL
Input Current
ISET
VSET ≤ 0.4V
-300
µA
POWER CHARACTERISTICS
Sleep Current
IIN(MIN)
Run Current
IIN(RUN)
η
Efficiency
VIN1 = 5VDC, SLEEP < 0.8V
0.0
VIN1 = 5VDC, SLEEP ≥ 2.0V, ISET1 = Ground
ISET2 = Open, VLAMP = 520VRMS
VIN1 = 5VDC, SLEEP ≥ 2.0V, ISET1 = Ground
ISET2 = Open, VLAMP = 520VRMS
10
50
µADC
1490
mADC
80
%
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
CN1-3
CN1-4
VIN1
Main Input Power Supply (4.75V < VIN1 < 5.25V)
GND
Power Supply Return
CN1-5
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 >= 2.1V = ON
Brightness Control (0V to 2.0VDC). 2.0VDC gives maximum lamp current.
CN2-1
VLO
Connection to low side of lamp. Connect to lamp terminal with longer lead length.
DO NOT connect to Ground
CN2-2
VHI1
High voltage connection to high Side of lamp. Connect to lamp terminal with shortest lead length.
DO NOT connect to Ground.
CN2-3
VHI2
High voltage connection to high Side of lamp. Connect to lamp terminal with shortest lead length.
DO NOT connect to Ground.
Copyright © 2005
Rev. 1.0, 2006-01-13
Microsemi
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 3
ELECTRICALS
CN2 for LXMG1626-05-66 (JST SM03(4.0)B-BHS-1-TB(LF)(SN) or Yeon Ho 20015WR-05A00)
PanelMatch™
5V 10W Dual CCFL Programmable Inverter Module
®
TM
LXMG1626-05-66
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
14.0mA
12.8mA
11.5mA
10.0mA
* If driven by a logic signal it should be open collector or open drain only, not a voltage source.
PHYSICAL DIMENSIONS
LXMG1626-05-66
UNPLATED MOUNTING HOLE
133mm
3MM ±.08 DIA.
6MM HEAD CLEARANCE BOTH HOLES
5.24in.
119mm
4.69in.
CN1
CN2
21mm
25mm
0.827in.
4.0mm
0.157in.
16mm
0.630in.
0.984in.
GROUNDED MOUNTING HOLE
3MM ±.08 DIA.
1.0mm
0.0394in.
7.5mm
0.295in.
Max
weight: 18g
PCB tolerances ± 0.5mm , 4-40 recommended mounting screws
Dimensions are in millimeters, inches for reference only.
Comparator
VBRITE
+
0 - 2VDC
9.09K
Ramp
-
Transformer
Driver
Ramp
Gen
VHI1
VHI2
VIN1
OCSENSE
PACKAGE DATA
+3V
High Voltage
Transformer
Controller
215K
LAMP
+3V
LAMP
SIMPLIFIED BLOCK DIAGRAM
10K
SET1
SET2
Copyright © 2005
Rev. 1.0, 2006-01-13
OVSENSE
+3V
10K
One of two
ISENSE
Microsemi
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
VLO
Page 4
PanelMatch™
®
TM
LXMG1626-05-66
5V 10W Dual CCFL Programmable Inverter Module
P RODUCTION D ATASHEET
5V
DAC or
Pot
VIN1
BRITE
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 microcontroller may also be used as shown in Figure 1A.
ƒ
If you need to turn the inverter ON/OFF remotely, connect
to TTL logic signal to the SLEEP input.
ƒ
Connect VHI1 and VHI2 to high voltage wires from the
lamps. Connect VLO to the low voltage wire lamp return
(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.
VHI1
VHI2
500K
LXMG1626-05-66
SLEEP
SET1
SET2
GND
VLO
NC
NC
Figure 1 – Brightness Control
(Output current set to maximum)
PWM Signal
from System
BRITE
P.W.
LXMG1626-05-66
10 µs to 20µS period
0 < P.W. < 100 % of period
Figure 1A – PWM Brightness Control
5V
BRITE
VHI1
VIN1
VHI2
LXMG1626-05-66
SLEEP
SET1
L
L
H
H
SET2
GND VLO
L
10.0mARMS
H
11.5mARMS
L
12.8mARMS
H
14.0mARMS
L=GND; H=Open
Figure 2 – Max Output Current
(SET1 and SET2 Inputs)
Copyright © 2005
Rev. 1.0, 2006-01-13
ƒ
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 a
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 VIN1 input supply
Microsemi
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 5
APPLICATION
ƒ
WWW . Microsemi .C OM
TYPICAL APPLICATION
PanelMatch™
TM
®
LXMG1626-05-66
5V 10W Dual CCFL Programmable Inverter Module
P RODUCTION D ATASHEET
WWW . Microsemi .C OM
NOTES
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 © 2005
Rev. 1.0, 2006-01-13
Microsemi
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 6