Microsemi LXMG1811-05-62 5v 6w ccfl programmable inverter module Datasheet

PanelMatch™ RangeMax™ LXMG1811-05-6x
®
TM
5V 6W CCFL Programmable Inverter Module
P RODUCTION D ATASHEET
KEY FEATURES
DESCRIPTION
The LXMG1811-05-6x is a Single
Output 6W CCFL (Cold Cathode
Fluorescent Lamp) Inverter Module
designed for the driving LCD backlight
lamps for panels in the range of 3.9” to
15”.
Utilizing the full-bridge drive topology
capabilities of the Microsemi’s highly
integrated LX6512 CCFL backlight
controller the inverter allows a wider lamp
output voltage range 280V to 730V
compared to Microsemi’s existing Direct
Drive™ inverter solutions.
For
applications
needing
fully
automatic brightness control an ‘S’ version
(LXMG1811-05-6xS)
of the inverter
includes a connector to mate the inverter
with an external light sensor board (the
LXMG1800_LS) which can extend the life
of the display and save power (particularly
important for battery powered products).
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
ƒ PanelMatch Externally
Programmable Maximum Output
Current
ƒ Wide Lamp Voltage Range
ƒ Fixed Frequency Operation
ƒ Output Short-Circuit Protection
and Automatic Strike-Voltage
Regulation and Timeout
ƒ RangeMAX Wide Range
Dimming (50:1+)
ƒ Rated From -30°C to 80°C
ƒ UL60950 Pending
ƒ RoHS Compliant
WWW . Microsemi .C OM
The maximum output current of the
inverter is externally programmable over
a range of 4mA to 7mA in 1mA steps to
allow the inverter to properly match
(PanelMatch™) to a wide array of LCD
panel lamp current specifications. For
higher input voltage requirements the
LXMG1813-12-6x or -6xS will work
from a 9V to 16V input supply.
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.
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.
APPLICATIONS
ƒ Medical Instrument Displays
ƒ Portable Instrumentation
ƒ Desktop Displays
ƒ Industrial Display Controls
BENEFITS
ƒ Smooth, Flicker Free Full-Range
Brightness Control
ƒ Programmable Output Current
Allows Inverter to Mate with a
Wide Variety of LCD Panel’s
Specifications
ƒ
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
DC Voltage
Source
1
2
3
Potentiometer
PWM
Signal
W
LXMG1811-05-6X
SELECTABLE MAXIMUM OUPUT
CURRENT 4MARMS TO 7MARMS
PACKAGE ORDER INFO
PART NUMBER
OUTPUT CONNECTOR
INVERTER MATES DIRECTLY
TO PANEL CONNECTORS
LXMG1811-05-61
LXMG1811-05-62
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 © 2008
Rev 1.0, 2008-11-25
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 800-877-6458, 714-898-8121, Fax: 714-893-2570
Page 1
PanelMatch™ RangeMax™ LXMG1811-05-6x
5V 6W CCFL Programmable Inverter Module
®
TM
P RODUCTION D ATASHEET
Input Signal Voltage (VIN) ........................................................................................................................................-0.3V to 6V
Input Power ......................................................................................................................................................................... 8W
Output Voltage, no load ............................................................................................................................................ 1800VRMS
Output Current ............................................................................................................................................................. 8mARMS
Output Power ...................................................................................................................................................................... 6W
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:
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
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 Range
Lamp Operating Voltage
Lamp Current (Full Brightness)
Operating Ambient Temperature Range
Recommended Operating Conditions
Min
R.C.
Max
VIN
PO
VBRT_ADJ
VLAMP
IO(LAMP)
TA
4.75
4.5
0
280
4.0
-30
Units
5.0
5.0
5.25
5.5
V
4.2
6.0
2.5
730
7.0
80
W
V
VRMS
mARMS
°C
500
ELECTRICAL CHARACTERISTICS
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.
LXMG1811-05-6x
Parameter
Symbol
Test Conditions
Units
Min
Typ
Max
`
OUTPUT PIN CHARACTERISTICS
IL(MAX)
SET1 = Ground, SET2 = Ground
3.5
4.0
4.5
mARMS
Full Bright Lamp Current
IL(MAX)
SET1 = Ground, SET2 = Open
4.5
5.0
5.5
mARMS
Full Bright Lamp Current
IL(MAX)
SET1 = Open, SET2 = Ground
5.4
6.0
6.6
mARMS
Full Bright Lamp Current
IL(MAX)
SET1 = Open, SET2 = Open
6.3
7.0
7.7
mARMS
Full Bright Lamp Current
IL(MAX)
VIN = 4.5 to 5.5V; SET1 = Open, SET2 = Ground
5.3
6.0
6.7
mARMS
IL(MIN)
BRITE = 0V, SET1 = SET2 = Ground,
IL(MIN) = ILMAX * Burst Duty Cycle
Min. Average Lamp Current
Lamp Start Voltage
Operating Frequency
Burst Frequency
Copyright © 2008
Rev 1.0, 2008-11-25
VLS
-30°C < TA < 80°C, VIN ≥ 4.5V
fO
fBURST
Output Burst Frequency
1.0
mARMS
1400
1650
47.7
53
58.3
kHz
173
206
239
Hz
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 800-877-6458, 714-898-8121, Fax: 714-893-2570
VRMS
Page 2
ELECTRICALS
Full Bright Lamp Current
PanelMatch™ RangeMax™ LXMG1811-05-6x
5V 6W CCFL Programmable Inverter Module
®
TM
P RODUCTION D ATASHEET
otherwise noted; BRITE ≥ 2.5V, SLEEP ≥ 2.1V, VIN = 5V.
Parameter
`
IBRT
`
BRITE = 0V
-17
µA
BRITE = 3V
-5
µA
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
Potentiometer used for BRITE Control
RBRT
Minimum PWM Input Frequency
`
Units
Test Conditions
BRITE INPUT
Input Current
`
LXMG1811-05-6x
Min
Typ
Max
Symbol
FBRT_PWM
2.1
400
%BRT_PWM < 50% (Visual Artifact Avoidance)
2.3
2.5
0
0.1
V
500
600
kΩ
100
kHz
3
V
WWW . Microsemi .C OM
ELECTRICAL CHARACTERISTICS (CONTINUED)
The following specifications apply over the recommended operating condition and ambient temperature of 0°C to 60°C except where
SLEEP BAR INPUT
RUN Mode
VSLEEP
2.1
VIN
V
SLEEP Mode
VSLEEP
0
0.8
V
SET1,2 INPUT
SET1,2 Low Threshold
VL
Input Current
ISET
SETx = 0V
0
V
-400
µA
POWER CHARACTERISTICS
Sleep Current
IIN(MIN)
Run Current
IRUN
Strike (Open Lamp)
SET1 = Open SET2 = Ground, VLAMP = 500VRMS
TS_DWELL
Supply Current under Fault condition
Typical Efficiency
5
SLEEP ≤ 0.8V
IFAULT
η
µA
2.0
Sec
750
1.0
1.4
Fault condition
SET1 = Open SET2 = Ground, VLAMP = 500VRMS
20
75
mA
5
mA
80
%
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 4.75V < VIN < 5.25V (Functional 4.5V to 5.5V)
Power Supply Return
SLEEP
ON/OFF Control. (0V ≤ SLEEP ≤ 0.8V = OFF, SLEEP ≥ 2.1V = ON
CN1-6
BRITE
Brightness Control (0V to 2.5V). 2.5V 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 LXMG1811-05-61 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
Copyright © 2008
Rev 1.0, 2008-11-25
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™ RangeMax™ LXMG1811-05-6x
5V 6W CCFL Programmable Inverter Module
®
TM
P RODUCTION D ATASHEET
TABLE 1
WWW . Microsemi .C OM
OUTPUT CURRENT SETTINGS
SET1
(Pin 7)
Open*
Open*
Ground
Ground
SET2
(Pin 8)
Open*
Ground
Open*
Ground
Nominal Output Current
7.0mA
6.0mA
5.0mA
4.0mA
* If driven by a logic signal it should be open collector or open drain only, not a voltage source.
PHYSICAL DIMENSIONS
LXMG1811-05-6x
110mm
93.5mm
4.33in.
MOUNTING HOLE
3.18MM ±.08 DIA.
3.68in.
X
CN1
16mm
0.63in.
3.5mm
12.5mm
9mm ±0.2
0.492in
CN2
CN2
0.354in.
X
0.138in.
74mm ±0.2
19.5mm
2.91in
GROUNDED MOUNTING
HOLE 3.18MM ±.08 DIA.
0.768in.
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
1.0mm ±0.1
0.0394in.
6.0mm Max
0.236in.
PCB tolerances ± 0.5mm , M3 recommended mounting screws
R1.0
Weight: (9g) typ.
All dimensions are in millimeters, inches are for reference only
SIMPLIFIED BLOCK DIAGRAM
VIN
+4.2V
191k
0.1µF
43.2k
LAMP HI
BRITE
Control
Circuitry
1.0µF
VIN
BLOCK DIAGRAM
SLEEP
LAMP
+4.2V
10k
OVSENSE
SET1
+4.2V
10k
ISENSE
SET2
Copyright © 2008
Rev 1.0, 2008-11-25
LAMP LO
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 800-877-6458, 714-898-8121, Fax: 714-893-2570
Page 4
PanelMatch™ RangeMax™ LXMG1811-05-6x
5V 6W CCFL Programmable Inverter Module
®
TM
P RODUCTION D ATASHEET
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
manufacture’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. 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) the inverter
will attempt to strike the lamp up to about 1.4 seconds,
after which (without success) the inverter will shutdown.
In this mode the inverter will draw about 5mA from VIN.
In order to restart the inverter it is necessary to toggle the
sleep input or cycle the VIN input supply.
VHI
VIN
BRITE
500k
CCFL
TUBE
LXMG1811-05-6x
SLEEP
SET1
SET2
NC
NC
GND
VLO
Figure 1 – Brightness Control
PWM Signal
from System
BRITE
P.W.
LXMG1811-05-6x
10µs to 333µS
0 < P.W. < 100% of period
Figure 1A – PWM Brightness Control
5V
VIN
BRITE
VHI
CCFL
TUBE
LXMG1811-05-6x
SLEEP
SET1
L
L
H
H
SET2
GND
VLO
L
4.0mARMS
H
5.0mARMS
L
6.0mARMS
H
7.0mARMS
L=GND; H=Open
Figure 2 – Max Output Current
(SET1 and SET2 Inputs)
Copyright © 2008
Rev 1.0, 2008-11-25
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 800-877-6458, 714-898-8121, Fax: 714-893-2570
Page 5
APPLICATION
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 234.2k pull-up to typically
4.2V to bias the pot. Logic levels 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.
5V
Voltage Source,
DAC, or
Potentiometer
0 to
2.5V
ƒ
WWW . Microsemi .C OM
TYPICAL APPLICATION
PanelMatch™ RangeMax™ LXMG1811-05-6x
TM
5V 6W CCFL Programmable Inverter Module
®
P RODUCTION D ATASHEET
NOTES
WWW . Microsemi .C OM
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, 2008-11-25
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 800-877-6458, 714-898-8121, Fax: 714-893-2570
Page 6
Similar pages