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PanelMatchTM RangeMaxTM LXMG1811-05-6x
TM (R)
5V 6W CCFL Programmable Inverter Module
PRODUCTION DATASHEET
DESCRIPTION
KEY FEATURES
WWW .Microsemi .C OM
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 DriveTM 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).
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 (PanelMatchTM) 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.
PanelMatch Externally Programmable Maximum Output Current Wide Lamp Voltage Range Fixed Frequency Operation Output Short-Circuit Protection and Automatic Strike-Voltage Regulation and Timeout RangeMAX Wide Range Dimming (50:1+) Rated From -30C to 80C UL60950 Pending RoHS Compliant
APPLICATIONS
Medical Instrument Displays Portable Instrumentation Desktop Displays Industrial Display Controls
BENEFITS
Smooth, Flicker Free Full-Range Brightness Control Programmable Output Current Allows Inverter to Mate with a Wide Variety of LCD Panel's Specifications
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
DC Voltage Source Potentiometer PWM Signal
1
2
3
LXMG1811-05-6X LXMG1811-05-6X
SELECTABLE MAXIMUM OUPUT CURRENT 4MARMS TO 7MARMS
PACKAGE ORDER INFO
PART NUMBER
LXMG1811-05-61 LXMG1811-05-62
OUTPUT CONNECTOR
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
INVERTER MATES DIRECTLY TO PANEL CONNECTORS
JST BHR-03VS-1 JST BHSR-02VS-1
Copyright (c) 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
PanelMatchTM RangeMaxTM LXMG1811-05-6x
TM (R)
5V 6W CCFL Programmable Inverter Module
PRODUCTION DATASHEET
ABSOLUTE MAXIMUM RATINGS 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.....................................................................................................-30C to 80C Storage Temperature Range...............................................................................................................................-40C to 85C
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.
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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
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
Symbol
VIN PO VBRT_ADJ VLAMP IO(LAMP) TA
Recommended Operating Conditions Min R.C. Max
4.75 4.5
0 280 4.0 -30
Units
V W V VRMS mARMS C
5.0 5.0
4.2 500
5.25 5.5
6.0 2.5 730 7.0 80
ELECTRICAL CHARACTERISTICS The following specifications apply over the recommended operating condition and ambient temperature of 0C to 60C 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 Full Bright Lamp Current Full Bright Lamp Current Full Bright Lamp Current Full Bright Lamp Current Full Bright Lamp Current Min. Average Lamp Current Lamp Start Voltage Operating Frequency Burst Frequency IL(MAX) IL(MAX) IL(MAX) IL(MAX) IL(MAX) IL(MIN) VLS fO fBURST Output Burst Frequency SET1 = Ground, SET2 = Ground SET1 = Ground, SET2 = Open SET1 = Open, SET2 = Ground SET1 = Open, SET2 = Open VIN = 4.5 to 5.5V; SET1 = Open, SET2 = Ground BRITE = 0V, SET1 = SET2 = Ground, IL(MIN) = ILMAX * Burst Duty Cycle -30C < TA < 80C, VIN 4.5V 1400 47.7 173 3.5 4.5 5.4 6.3 5.3 4.0 5.0 6.0 7.0 6.0 1.0 1650 53 206 58.3 239 4.5 5.5 6.6 7.7 6.7 mARMS mARMS mARMS mARMS mARMS
ELECTRICALS ELECTRICALS
mARMS VRMS kHz Hz
Copyright (c) 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 2
PanelMatchTM RangeMaxTM LXMG1811-05-6x
TM (R)
5V 6W CCFL Programmable Inverter Module
PRODUCTION DATASHEET
ELECTRICAL CHARACTERISTICS (CONTINUED) The following specifications apply over the recommended operating condition and ambient temperature of 0C to 60C except where otherwise noted; BRITE 2.5V, SLEEP 2.1V, VIN = 5V. Parameter
BRITE INPUT Input Current Minimum Input for Max. Lamp Current Maximum Input for Min. Lamp Current Potentiometer used for BRITE Control Minimum PWM Input Frequency SLEEP BAR INPUT RUN Mode SLEEP Mode SET1,2 INPUT SET1,2 Low Threshold Input Current POWER CHARACTERISTICS Sleep Current Run Current Strike (Open Lamp) Supply Current under Fault condition Typical Efficiency IIN(MIN) IRUN TS_DWELL IFAULT Fault condition SET1 = Open SET2 = Ground, VLAMP = 500VRMS 75 VL ISET SETx = 0V 0 -400 5 750 1.0 20 2.0 V A A mA Sec mA % IBRT VBRT_ADJ VBRT_ADJ BRITE = 0V BRITE = 3V IO(LAMP) = Maximum Lamp Current IO(LAMP) = Minimum Lamp Current 2.1 -17 -5 2.3 0 2.5 0.1 A A V V k kHz V V
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Symbol
Test Conditions
LXMG1811-05-6x Min Typ Max
Units
RBRT
FBRT_PWM %BRT_PWM < 50% (Visual Artifact Avoidance)
400
3 2.1 0
500
600
100 VIN 0.8
VSLEEP VSLEEP
SLEEP 0.8V
SET1 = Open SET2 = Ground, VLAMP = 500VRMS
1.4
5 80
FUNCTIONAL PIN DESCRIPTION
CONN CN1-1 CN1-2 CN1-3 CN1-4 CN1-5 CN1-6 CN1-7 CN1-8 PIN DESCRIPTION CN1 (Molex 53261-0871 or equivalent) mates with 51021-0800 housing, 50079-8100 pins. Mates with LX9501G input cable assembly VIN GND
Main Input Power Supply 4.75V < VIN < 5.25V (Functional 4.5V to 5.5V)
Power Supply Return ON/OFF Control. (0V SLEEP 0.8V = OFF, SLEEP 2.1V = ON
SLEEP
BRITE SET1 SET2
Brightness Control (0V to 2.5V). 2.5V gives maximum lamp current.
SET1 MSB Connecting this pin to ground decreases the output current (see Table 1) SET2 LSB Connecting this pin to ground decreases the output current (see Table 1)
ELECTRICALS ELECTRICALS
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 CN2-2 VHI VLO High voltage connection to high side of lamp. Connect to lamp terminal with shortest lead length. DO NOT connect to Ground. Connection to low side of lamp. Connect to lamp terminal with longer lead length. DO NOT connect to Ground
Copyright (c) 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
PanelMatchTM RangeMaxTM LXMG1811-05-6x
TM (R)
5V 6W CCFL Programmable Inverter Module
PRODUCTION DATASHEET
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 PHYSICAL DIMENSIONS LXMG1811-05-6x
110mm 93.5mm
3.68in. 4.33in. MOUNTING HOLE 3.18MM .08 DIA.
* If driven by a logic signal it should be open collector or open drain only, not a voltage source.
CN1 16mm
0.63in. 9mm 0.2
0.354in.
12.5mm
0.492in
CN2 CN2
3.5mm
0.138in.
74mm 0.2
19.5mm
0.768in.
GROUNDED MOUNTING HOLE 3.18MM .08 DIA.
2.91in
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
6.0mm Max
0.236in.
1.0mm 0.1
0.0394in.
R1.0
PCB tolerances 0.5mm , M3 recommended mounting screws
Weight: (9g) typ.
All dimensions are in millimeters, inches are for reference only
SIMPLIFIED BLOCK DIAGRAM
+4.2V
VIN
191k 43.2k
BRITE
0.1F
LAMP HI
1.0F
Control Circuitry
VIN
BLOCK DIAGRAM
SLEEP
+4.2V 10k
LAMP
OVSENSE
SET1 +4.2V 10k SET2
ISENSE LAMP LO
Copyright (c) 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 4
PanelMatchTM RangeMaxTM LXMG1811-05-6x
TM (R)
5V 6W CCFL Programmable Inverter Module
PRODUCTION DATASHEET
TYPICAL 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. If you need to turn the inverter ON/OFF remotely, connect to TTL logic signal to the SLEEP input.
SET2 NC GND VLO
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Voltage Source, DAC, or Potentiometer 0 to 2.5V
5V VIN VHI
BRITE
500k LXMG1811-05-6x
CCFL TUBE
SLEEP SET1 NC
Figure 1 - Brightness Control
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. 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. 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. 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.
PWM Signal from System P.W.
BRITE
LXMG1811-05-6x
10s to 333S 0 < P.W. < 100% of period
Figure 1A - PWM Brightness Control
5V BRITE VIN VHI CCFL TUBE VLO
LXMG1811-05-6x SLEEP SET1 SET2 GND
APPLICATION APPLICATION
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)
L L H H
Copyright (c) 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
PanelMatchTM RangeMaxTM LXMG1811-05-6x
TM (R)
5V 6W CCFL Programmable Inverter Module
PRODUCTION DATASHEET
NOTES
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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 (c) 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

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