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LXMG1626-05-66
PRODUCTION DATASHEET
5V 10W Dual CCFL Programmable Inverter Module
DESCRIPTION
KEY FEATURES
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The LXMG1626-05-66 is a 10W Dual Output Direct DriveTM 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.
The RangeMAXTM 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.
Externally Programmable Maximum Output Current Easy to Use Brightness Control RangeMAXTM Wide Range Dimming Output Open & Short-Circuit Protection and Automatic StrikeVoltage Regulation and Timeout Fixed Frequency Operation Rated From -20 to 70C RoHS Compliant
APPLICATIONS
Dual Lamp LCD's Requiring a Shared Common Lamp Return Mates to a Single JST BHR03VS-1 Lamp Connector Output Connector Polarity 1:low, 2:high, 3:high Desktop Displays Industrial Display Controls
BENEFITS
Smooth, Flicker Free 1%-100% Full-Range Brightness Control Programmable Output Current Allows Inverter to Mate With a Wide Variety of LCD Panel's Specifications 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
INPUT
HI HI
DC Voltage Source
Potentiometer
PWM Signal
Microsemi
LXMG1626-05-66 LXMG1626-05-66
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 OUTPUT CONNECTOR
Copyright (c) 2005 Rev. 1.0, 2006-01-13
Microsemi
Integrated Products 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
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PanelMatchTM
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LXMG1626-05-66
PRODUCTION DATASHEET
5V 10W Dual CCFL Programmable Inverter Module
ABSOLUTE MAXIMUM RATINGS (NOTE 1) 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.....................................................................................................-20C to 70C Operating Relative Humidity, non-condensing ................................................................................................................ 90% Storage Temperature Range...............................................................................................................................-40C to 85C
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.
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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, will 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 VIN1 PO VBRT_ADJ VLAMP IOLAMP TA Recommended Operating Conditions Min R.C. Max 4.75 4.5 0 460 10 -20 5 5 8 540 5.25 5.5 9 2.0 620* 14 70 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 25C except where otherwise noted. Parameter
OUTPUT PIN CHARACTERISTICS Full Bright Lamp Current (two lamps) Full Bright Lamp Current (two lamps) Full Bright Lamp Current ((two lamps) Full Bright Lamp Current ((two lamps) Output Current Lamp to Lamp Deviation Min. Average Lamp Current (each output) Lamp Start Voltage Operating Frequency Burst Frequency Copyright (c) 2005 Rev. 1.0, 2006-01-13 IL(MAX) IL(MAX) IL(MAX) IL(MAX) ILL%DEV 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 -20C < TA < 70C, VIN1 > 4.5VDC VBRT_ADJ = 2.0VDC, SLEEP > 2.0V, VIN1 = 5V Output Burst Frequency 8.8 10.3 11.3 12.3 10 11.5 12.8 14 5 1.4 1350 62 242 1500 65 254 68 266 11 12.5 13.8 15 mARMS mARMS
Symbol
Test Conditions
LXMG1626-05-66 Min Typ Max
Units
ELECTRICALS ELECTRICALS
mARMS mARMS % mARMS VRMS kHz Hz
Microsemi
Integrated Products 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
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PanelMatchTM
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LXMG1626-05-66
PRODUCTION DATASHEET
5V 10W Dual CCFL Programmable Inverter Module
ELECTRICAL CHARACTERISTICS (CONTINUED) Unless otherwise specified, the following specifications apply over the recommended operating condition and ambient temperature of 25C except where otherwise noted. Parameter
BRITE INPUT Input Current Minimum Input for Max. Lamp Current Maximum Input for Min. Lamp Current SLEEP INPUT RUN Mode SLEEP Mode SET1,2 INPUT SET1,2 Low Threshold Input Current POWER CHARACTERISTICS Sleep Current Run Current Efficiency IIN(MIN) IIN(RUN) VIN1 = 5VDC, SLEEP < 0.8V VIN1 = 5VDC, SLEEP 2.0V, ISET1 = Ground ISET2 = Open, VLAMP = 520VRMS VIN1 = 5VDC, SLEEP 2.0V, ISET1 = Ground ISET2 = Open, VLAMP = 520VRMS 0.0 10 1490 80 50 ADC mADC % VL ISET VSET 0.4V -300 0.4 V A IBRT VBRT_ADJ VBRT_ADJ VBRT_ADJ = 0VDC VBRT_ADJ = 3VDC IO(LAMP) = Maximum Lamp Current IO(LAMP) = Minimum Lamp Current 0 -13.2 1 2.0 2.05 ADC ADC VDC VDC
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Symbol
Test Conditions
LXMG1626-05-66 Min Typ Max
Units
VSLEEP VSLEEP
2.1 -0.3
VIN1 0.8
VDC VDC
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) Mates with 51021-0800 housing, 50079-8100 pins. Mates with LX9501G input cable assembly VIN1 GND Main Input Power Supply (4.75V < VIN1 < 5.25V) Power Supply Return ON/OFF Control. (0V < SLEEP < 0.8 = OFF, SLEEP >= 2.1V = ON Brightness Control (0V to 2.0VDC). 2.0VDC 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)
SLEEP
BRITE SET1 SET2
ELECTRICALS ELECTRICALS
CN2 for LXMG1626-05-66 (JST SM03(4.0)B-BHS-1-TB(LF)(SN) or Yeon Ho 20015WR-05A00) CN2-1 CN2-2 CN2-3 VLO VHI1 VHI2 Connection to low side of lamp. Connect to lamp terminal with longer lead length. DO NOT connect to Ground High voltage connection to high Side of lamp. Connect to lamp terminal with shortest lead length. DO NOT connect to Ground. High voltage connection to high Side of lamp. Connect to lamp terminal with shortest lead length. DO NOT connect to Ground.
Copyright (c) 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
PanelMatchTM
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LXMG1626-05-66
PRODUCTION DATASHEET
5V 10W Dual CCFL Programmable Inverter Module
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 PHYSICAL DIMENSIONS LXMG1626-05-66
UNPLATED MOUNTING HOLE
3MM .08 DIA. 6MM HEAD CLEARANCE BOTH HOLES
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* If driven by a logic signal it should be open collector or open drain only, not a voltage source.
133mm
5.24in.
119mm
4.69in.
CN1 CN2
21mm 4.0mm
0.157in. 0.827in.
25mm
0.984in.
16mm
0.630in.
GROUNDED MOUNTING HOLE 3MM .08 DIA.
1.0mm
0.0394in.
7.5mm
0.295in. Max
Dimensions are in millimeters, inches for reference only.
weight: 18g
PCB tolerances 0.5mm , 4-40 recommended mounting screws
SIMPLIFIED BLOCK DIAGRAM
+3V 215K VBRITE 0 - 2VDC 9.09K Ramp +3V 10K SET1 +3V 10K Controller Comparator +
High Voltage Transformer
VIN1
VHI1
VHI2
Transformer Driver
LAMP
LAMP
PACKAGE DATA PACKAGE DATA
Ramp Gen
OCSENSE
OVSENSE ISENSE
One of two
SET2
VLO
Copyright (c) 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 4
PanelMatchTM
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LXMG1626-05-66
PRODUCTION DATASHEET
5V 10W Dual CCFL Programmable Inverter Module
TYPICAL APPLICATION
5V DAC or Pot BRITE VIN1 VHI1 VHI2 LXMG1626-05-66
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500K
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. If you need to turn the inverter ON/OFF remotely, connect to TTL logic signal to the SLEEP input.
SLEEP SET1 SET2 NC NC
GND
VLO
Figure 1 - Brightness Control (Output current set to maximum)
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. 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. 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. 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
PWM Signal from System P.W.
10 s to 20S period 0 < P.W. < 100 % of period
BRITE
LXMG1626-05-66
Figure 1A - PWM Brightness Control
5V BRITE VIN1 VHI1 VHI2 LXMG1626-05-66 SLEEP SET1 SET2 GND VLO
A APPLICATION
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)
L L H H
Copyright (c) 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 5
PanelMatchTM
TM (R)
LXMG1626-05-66
PRODUCTION DATASHEET
5V 10W Dual CCFL Programmable Inverter Module
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) 2005 Rev. 1.0, 2006-01-13
Microsemi
Integrated Products 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
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