Microsemi LXMG1627-12-62 12v dual 6w programmable ccfl inverter module Datasheet

PanelMatch™
®
TM
LXMG1627-12-6x
12V Dual 6W Programmable CCFL Inverter Module
P RODUCTION D ATASHEET
KEY FEATURES
DESCRIPTION
The resultant “burst drive” that
energizes the lamp was designed
specifically to ensure 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. A 5V input inverter is also
available (LXMG1627-05-6x), as well as
4W versions (LXMG1627-xx-4x) for
driving smaller lower voltage/power
panels.
The module’s design is based on
Microsemi’s
LX6512
backlight
controller, which provides a number of
cost and performance advantages due to
the controller’s high level of integration.
Other benefits of this new topology
are stable fixed-frequency operation,
secondary-side strike-voltage regulation
and both open and short 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 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 -30°C to 80°C
ƒ UL60950 E175910 Pending
ƒ RoHS Compliant
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The LXMG1627-12-6x is a Dual 6W
Output Direct Drive™ CCFL (Cold
Cathode Fluorescent Lamp) Inverter
Module specifically designed for driving
LCD backlight lamps. It is ideal for
driving typical 10.4” to 15” TFT panels.
LXMG1627 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 or
a PWM signal or external potentiometer.
The maximum output current is externally
programmable over a range of 5mA to
8mA in 1mA steps to allow the inverter to
properly match to a wide array of LCD
panel lamp current specifications.
RangeMAX™
Digital
Dimming
Technique provides flicker-free brightness
control in any wide range typically (50:1+)
dimming application.
APPLICATIONS
ƒ
ƒ
ƒ
ƒ
High Brightness Displays
Portable Instrumentation
Desktop Displays
Industrial Display Controls
BENEFITS
ƒ Smooth, Flicker Free 2%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
PRODUCT HIGHLIGHT
UNIVERSAL DIMMING INPUT
“PWM”, VDC, or POTENTIOMETER
Potentiometer
PWM
Signal
W
1
3
W
SELECTABLE MAXIMUM OUTPUT
CURRENT 5mARMS TO 8mARMS
PACKAGE ORDER INFO
PART NUMBER
LXMG1627-12-61
LXMG1627-12-62
Copyright © 2008
Rev. 1.0, 2008-12-03
OUTPUT CONNECTOR
JST SM02(8.0)B-BHS-1-TB(LF)(SN) or Yeon Ho 20015WR-05A00
JST SM02B-BHSS-1-TB(LF)(SN) or Yeon Ho 35001WR-02A00
INVERTER MATES DIRECTLY TO
PANEL CONNECTORS
JST BHR-03VS-1
JST BHSR-02VS-1
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 800-877-6458, 714-898-8121, Fax: 714-893-2570
Page 1
LXMG1627-12-6X
2
2
1
3
DC Voltage
Source
PanelMatch™
®
TM
LXMG1627-12-6x
12V Dual 6W Programmable CCFL Inverter Module
P RODUCTION D ATASHEET
Input Signal Voltage (VIN) ......................................................................................................................................-0.3V to 15V
Input Power ....................................................................................................................................................................... 15W
Output Voltage, no load ............................................................................................................ Internally Limited to 1800VRMS
Output Current ............................................................................................................................9.5mARMS (Internally Limited)
Output Power (each output) ............................................................................................................................................. 6.0W
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
Operating Relative Humidity, non-condensing ................................................................................................................ ≤ 90%
Storage Temperature Range...............................................................................................................................-40°C to 85°C
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
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 (each output)
Linear BRITE Control Input Voltage Range
Lamp Operating Voltage
Lamp Current (Full Brightness)
Operating Ambient Temperature Range
Recommended Operating Conditions
Min
R.C.
Max
VIN
PO
VBRT_ADJ
VLAMP
IOLAMP
TA
10.8
12
13.2
10.2
12
5.5
13.8
6.0
2.5
720
8.0
80
0
480
5.0
-30
600
Units
V
W
V
VRMS
mARMS
°C
ELECTRICAL CHARACTERISTICS
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; BRITE > 2.5V, SLEEP > 2.0V, VIN = 12V.
LXMG1627-12-6x
Parameter
Symbol
Test Conditions
Units
Min
Typ
Max
`
OUTPUT PIN CHARACTERISTICS
IL(MAX)
SET1 = Ground, SET2 = Ground
4.4
5.0
5.6
mARMS
Full Bright Lamp Current (each output)
IL(MAX)
SET1 = Ground, SET2 = Open
5.4
6.0
6.6
mARMS
Full Bright Lamp Current (each output)
IL(MAX)
SET1 = Open, SET2 = Ground
6.4
7.0
7.6
mARMS
Full Bright Lamp Current (each output)
IL(MAX)
SET1 = Open, SET2 = Open
7.4
8.0
8.6
mARMS
Output Current Lamp to Lamp
Deviation
ILL%DEV
SET1 = Open, SET2 = Open
2
5
%
Min. Average Lamp Current
(each output)
Lamp Start Voltage
Operating Frequency
Burst Frequency
Copyright © 2008
Rev. 1.0, 2008-12-03
IL(MIN)
VLS
BRITE = 0V SET1 = SET2 = Ground
IL(MIN) = ILMAX * Burst Duty Cycle
-30°C < TA < 80°C, VIN > 10.8V
fO
fBURST
Output Burst Frequency
1.0
mARMS
1500
1650
VRMS
45
50
55
kHz
165
200
235
Hz
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 800-877-6458, 714-898-8121, Fax: 714-893-2570
Page 2
ELECTRICALS
Full Bright Lamp Current (each output)
PanelMatch™
®
TM
LXMG1627-12-6x
12V Dual 6W Programmable CCFL Inverter Module
P RODUCTION D ATASHEET
Parameter
`
`
`
Units
BRITE = 0V
-13.4
µA
BRITE = 3V
-5
µA
Test Conditions
BRITE INPUT
Input Current
`
LXMG1627-12-6x
Min
Typ
Max
Symbol
IBRT
Minimum Input for Max. Lamp Current
VBRT_ADJ
IO(LAMP) = Maximum Lamp Current
2.1
Maximum Input for Min. Lamp Current
VBRT_ADJ
IO(LAMP) = Minimum Lamp Current
0
2.3
2.5
V
V
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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; BRITE > 2.5V, SLEEP > 2.0V, VIN = 12V
SLEEP INPUT
RUN Mode
VSLEEP
2.0
VIN
V
SLEEP Mode
VSLEEP
0
0.8
V
SET1,2 Low Threshold
VL
0
0.4
V
Input Current
ISET
SET1,2 INPUT
SETx = 0V
-85
µA
POWER CHARACTERISTICS
Sleep Current
IIN(MIN)
SLEEP < 0.8V
Run Current
IIN(RUN)
SET1 = Open, SET2 = Ground, VLAMP = 600VRMS
Strike (Open Lamps)
IFAULT
η
20
µA
875
mA
1.5
Sec
Fault Timeout
7
mA
SET1 = Open, SET2 = Ground, VLAMP = 600VRMS
80
%
TS_DWELL
Supply Current After Fault Timeout
Efficiency
2
1.0
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
VIN
GND
Main Input Power Supply (10.8V < VIN < 13.2V)
Power Supply Return
SLEEP
ON/OFF Control. (0V ≤ SLEEP ≤ 0.8 = OFF, SLEEP ≥ 2.0V = ON
CN1-6
BRITE
Brightness Control (0V to 2.5V). 2.5V gives maximum lamp current; 500k manual pot; PWM signal.
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, CN3 for LXMG1627-12-61 and -62
(JST SM02(8.0)B-BHS-1-TB(LF)(SN) | Yeon Ho 20015WR-05A00 or SM02B-BHSS-1-TB(LF)(SN) | Yeon Ho 35001WR02A00)
CN2-1
CN3-1
VHI
High voltage connection to high side of lamp. Connect to lamp terminal with shortest lead length.
DO NOT connect to Ground.
CN2-2
CN3-2
VLO
Connection to low side of lamp. Connect to lamp terminal with longer lead length.
DO NOT connect to Ground
Copyright © 2008
Rev. 1.0, 2008-12-03
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
CN1-5
PanelMatch™
®
TM
LXMG1627-12-6x
12V Dual 6W Programmable CCFL Inverter Module
P RODUCTION D ATASHEET
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TABLE 1
OUTPUT CURRENT SETTINGS
SET1
(Pin 7)
Open*
Open*
Ground
Ground
SET2
(Pin 8)
Open*
Ground
Open*
Ground
Nominal Output Current
8.0mA
7.0mA
6.0mA
5.0mA
* If driven by a logic signal it should be open collector or open drain only, not a voltage source.
PHYSICAL DIMENSIONS
LXMG1627-12-6x
GROUNDED MOUNTING HOLE 3MM ±.08 DIA.
6MM HEAD CLEARANCE BOTH HOLES
165mm
151mm
6.496 in.
5.945 in.
3mm
.118 in
MOUNTING HOLE 3.06MM
±.08 DIA.
CN2
18mm
.708 in.
CN1
21mm
CN3
0.827in
14mm
1mm ± 0.1
.551 in
137mm ±0.2
5.394 in.
0.0395 in.
10mm Max
0.394in.
Warning
High Voltage is present at
high side of each transformer,
its core and the high side of
the output connector pins,
please provide at least 3 mm
clearance (in all directions) on
the component side of the
board to any conductor when
mounting
weight: 22g typ.
PCB tolerances ± 0.5mm , 4-40 recommended mounting screws
Dimensions are in millimeters (inches for reference only)
SIMPLIFIED BLOCK DIAGRAM
+4.2V
High Voltage
Transformer
Controller
249k
Comparator
+
49.9k
Ramp
-
Transformer
Driver
VIN
Ramp
Gen
+4.2V
PACKAGE DATA
LAMP
BRITE
VHI
47k
SET1
SET2
+4.2V
47k
OVSENSE
ISENSE
One of two
Copyright © 2008
Rev. 1.0, 2008-12-03
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 800-877-6458, 714-898-8121, Fax: 714-893-2570
VLO
Page 4
PanelMatch™
®
TM
LXMG1627-12-6x
12V Dual 6W Programmable CCFL Inverter Module
P RODUCTION D ATASHEET
12V
Voltage Source,
DAC, or
Potentiometer
VIN
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 300k pull-up to typically 4.2V
to bias the pot. PWM Logic levels (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 2.3V divided by the logic high
voltage level; with 3.3V logic level this corresponds to
about 70% 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 a 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.
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.
ƒ
The inverter has a built in fault timeout function. If either
or both outputs are open (lamp disconnected or broken) the
inverter will attempt to strike for about a 1.5 seconds and
then shutdown for safety purposes. In order to restart the
inverter it is necessary to toggle the sleep input or cycle the
VIN input supply.
VHI
0V to
2.5V 500k
CCFL
TUBE
LXMG1627-12-6x
VLO
SLEEP
SET1
SET2
NC
NC
ONE OF
TWO
GND
Figure 1 – Brightness Control
(Output current set to maximum)
PWM Signal
from System
BRITE
P.W.
LXMG1627-12-6x
10µs to 500µS
0 < P.W. < 100% of period
Figure 1A – PWM Brightness Control
12V
VIN
BRITE
VHI
CCFL
TUBE
LXMG1627-12-6x
SLEEP
SET1
SET2
GND
VLO
ONE OF
TWO
L
L
H
H
L
5.0mARMS
H
6.0mARMS
L
7.0mARMS
H
8.0mARMS
L=GND; H=Open
Figure 2 – Maximum Output Current
(SET1 and SET2 Inputs)
Copyright © 2008
Rev. 1.0, 2008-12-03
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 800-877-6458, 714-898-8121, Fax: 714-893-2570
Page 5
APPLICATIONS
ƒ
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TYPICAL APPLICATION
PanelMatch™
TM
®
LXMG1627-12-6x
12V Dual 6W Programmable CCFL Inverter Module
P RODUCTION D ATASHEET
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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 © 2008
Rev. 1.0, 2008-12-03
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 800-877-6458, 714-898-8121, Fax: 714-893-2570
Page 6
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