Microsemi LXMG1627-05-4X 5v dual 4w programmable ccfl inverter module Datasheet

PanelMatch™
®
TM
LXMG1627-05-4x
5V Dual 4W Programmable CCFL Inverter Module
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 -30°C to 80°C
ƒ UL60950 E175910 Pending
ƒ RoHS Compliant
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 12V input inverter is also
available (LXMG1627-12-4x), as well as
6W versions (LXMG1627-xx-6x) for
driving large higher 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.
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The LXMG1627-05-4x is a Dual 4W
Output Direct Drive™ CCFL (Cold
Cathode Fluorescent Lamp) Inverter
Module specifically designed for driving
LCD backlight lamps. It is ideal for
driving typical 6.4” to 10.4” 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
6.5mA in 0.5mA 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
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
PRODUCT HIGHLIGHT
UNIVERSAL DIMMING
INPUT
“PWM”, VDC, or
POTENTIOMETER
Potentiometer
PWM
Signal
SELECTABLE MAXIMUM
OUTPUT CURRENT
5.0mARMS TO 6.5mARMS
CN1
1
1
W
W
2
3
CN3
PACKAGE ORDER INFO
PART NUMBER
LXMG1627-05-41
LXMG1627-05-42
Copyright © 2009
Rev. 1.0, 2009-06-18
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
LXMG1627-05-4X
2
3
CN2
DC Voltage
Source
PanelMatch™
®
TM
LXMG1627-05-4x
5V Dual 4W Programmable CCFL Inverter Module
P RODUCTION D ATASHEET
Input Signal Voltage (VIN) ........................................................................................................................................-0.3V to 6V
Input Power ....................................................................................................................................................................... 12W
Output Voltage, no load ............................................................................................................ Internally Limited to 1400VRMS
Output Current ............................................................................................................................9.5mARMS (Internally Limited)
Output Power (each output) ................................................................................................................................................ 5W
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)
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
4.75
PO
VBRT_ADJ
VLAMP
IOLAMP
TA
0.0
350
5
Units
5
5.25
V
3.5
4.0
2.5
530
6.5
W
V
VRMS
mARMS
°C
440
-30
80
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 ≥ 2.1V, VIN = 5V.
LXMG1627-05-4x
Parameter
Symbol
Test Conditions
Units
Min
Typ
Max
`
OUTPUT PIN CHARACTERISTICS
IL(MAX)
SET1 = Ground, SET2 = Ground
4.5
5.0
5.5
mARMS
Full Bright Lamp Current (each output)
IL(MAX)
SET1 = Ground, SET2 = Open
5.0
5.5
6.0
mARMS
Full Bright Lamp Current (each output)
IL(MAX)
SET1 = Open, SET2 = Ground
5.5
6.0
6.5
mARMS
Full Bright Lamp Current (each output)
IL(MAX)
SET1 = Open, SET2 = Open
6.0
6.5
7.0
mARMS
Output Current Lamp to Lamp
Deviation
ILL%DEV
SET1 = Open, SET2 = Open
5
10
%
Min. Average Lamp Current
(each output)
Lamp Start Voltage
Operating Frequency
Burst Frequency
Copyright © 2009
Rev. 1.0, 2009-06-18
IL(MIN)
VLS
BRITE = 0V SET1 = SET2 = Ground
IL(MIN) = ILMAX * Burst Duty Cycle
-30°C < TA < 80°C, VIN > 4.75V
fO
fBURST
Output Burst Frequency
1.0
mARMS
1250
1400
VRMS
48
54
60
kHz
140
165
198
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
LXMG1627-05-4x
5V Dual 4W Programmable CCFL Inverter Module
P RODUCTION D ATASHEET
Parameter
`
IBRT
Minimum Input for Max. Lamp Current
`
`
Units
BRITE = 0V
-13.4
µA
BRITE = 3V
-5
µA
Test Conditions
BRITE INPUT
Input Current
`
LXMG1627-05-4x
Min
Typ
Max
Symbol
VBRT_ADJ
IO(LAMP) = Maximum Lamp Current
2.1
2.3
2.5
V
Maximum Input for Min. Lamp Current
VBRT_ADJ
IO(LAMP) = Minimum Lamp Current
0
BRITE PWM Input Frequency Range
FBRT_PWM
%BRT_PWM < 50% (Visual Artifact Avoidance)
2
100
kHz
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 ≥ 2.1V, VIN = 5V
SLEEP INPUT
RUN Mode
VSLEEP
2.1
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 = 440VRMS
Strike (Open Lamps)
IFAULT
η
20
µA
1320
mA
1.5
Sec
Fault Timeout
7
mA
SET1 = Open, SET2 = Ground, VLAMP = 440VRMS
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 (4.75V ≤ VIN ≤ 5.25V)
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
CN2, CN3 for LXMG1627-05-41 and -42
(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 © 2009
Rev. 1.0, 2009-06-18
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
Brightness Control (0V to 2.5V). 2.3V gives maximum lamp current; 500k manual pot; PWM signal.
PanelMatch™
®
TM
LXMG1627-05-4x
5V Dual 4W 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
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
LXMG1627-05-4X
125mm
GROUNDED MOUNTING HOLE 3.18MM ±.08 DIA.
6MM HEAD CLEARANCE BOTH HOLES
4.921 in.
114mm
4.488 in.
CN2
22mm ± 0.2mm
CN1
W
0.866in
30mm
1.181in
W
4mm
MOUNTING HOLE 3.18MM ±.08 DIA.
0.157 in
CN3
103mm ±0.2
11mm
0.433 in
4.055 in.
1mm ± 0.1
0.0395 in.
6mm Max
CN2
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
CN3
CN1
0.236in.
weight: 18g typ.
PCB tolerances ± 0.5mm , 3mm 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
VIN
Ramp
Gen
+4.2V
PACKAGE DATA
-
Transformer
Driver
LAMP
BRITE
VHI
47k
SET1
SET2
+4.2V
47k
OVSENSE
ISENSE
One of two
Copyright © 2009
Rev. 1.0, 2009-06-18
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
LXMG1627-05-4x
5V Dual 4W Programmable CCFL Inverter Module
P RODUCTION D ATASHEET
Voltage Source,
DAC, or
Potentiometer
5V
VIN
BRITE
VLO
NC
NC
ONE OF
TWO
GND
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.
Figure 1 – Brightness Control
(Output current set to maximum)
PWM Signal
from System
BRITE
P.W.
LXMG1627-05-4x
10µs to 500µS
0 < P.W. < 100% of period
Figure 1A – PWM Brightness Control
5V
VIN
BRITE
VHI
CCFL
TUBE
LXMG1627-05-4x
SLEEP
SET1
SET2
GND
VLO
ONE OF
TWO
L
L
H
H
L
5.0mARMS
H
5.5mARMS
L
6.0mARMS
H
6.5mARMS
L=GND; H=Open
Figure 2 – Maximum Output Current
(SET1 and SET2 Inputs)
Copyright © 2009
Rev. 1.0, 2009-06-18
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
CCFL
TUBE
LXMG1627-05-4x
SET2
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. 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 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.
VHI
0V to
2.5V 500k
SLEEP
SET1
ƒ
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TYPICAL APPLICATION
PanelMatch™
TM
®
LXMG1627-05-4x
5V Dual 4W 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 © 2009
Rev. 1.0, 2009-06-18
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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