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PanelMatchTM StayLitTM
TM (R)
LXMG1626-05-45
5V Dual 6W CCFL Programmable Inverter Module
PRODUCTION DATASHEET
DESCRIPTION
KEY FEATURES
WWW .Microsemi .C OM
The LXMG1626-05-45 is a Dual 6W Output Direct DriveTM CCFL (Cold Cathode Fluorescent Lamp) Inverter Module specifically designed to be compatible with variety of LCD panels that have both lamps on one side of the panel and use a single common lamp return wire. 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) at either 10mA or 12mA (5mA or 6mA per lamp). 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 inverter also has a dedicated FAULT pin that indicates an open/shorted lamp condition.
In addition when only one of the two lamps in the LCD fails open, the second lamp will continue to operate with a FAULT signal toggling to indicate the failed condition, StayLitTMfeature. RangeMAX Digital Dimming Technique provides flicker-free brightness control in any wide range typically (100:1+) dimming application. The resultant "burst drive" that energizes the lamp is designed specifically to ensure that no premature lamp degradation occurs, while allowing significant power savings at lower dim levels. The design utilizes Microsemi's highly integrated LX1691B backlight controller to convert DC voltage from the system battery or AC adapter directly to high frequency, high-voltage waves required to ignite and operate CCFL lamps. 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 RangeMAX Wide Range Dimming Output Open & Short-Circuit Protection and Automatic StrikeVoltage Regulation and Timeout StayLitTM Continued Operation with Single Open Lamp Failure Fixed Frequency Operation Fault Output Signal Rated From -30C to 80C RoHS Compliant
UL60950 E175910 APPLICATIONS
Dual lamp LCD's requiring a shared common lamp return Mates to a single JST BHR-04 VS-1 lamp connector 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
DC Voltage Source
Potentiometer
PWM Signal
LXMG1626-05-45 LXMG1626-05-45
Microsemi
HI
Lamp Fault Signal
OUTPUT
"PWM",
Lamp current 5 or 6mA per Lamp
VDC, OR POTENTIOMETER
PACKAGE ORDER INFO
PART NUMBER
LXMG1626-05-45
Copyright (c) 2005 Rev. 1.0, 2007-01-24
OUTPUT CONNECTOR
JST SM04(4.0)B-BHS-1-TB(LF)(SN) or Yeon Ho 20015WR-07A00
INVERTER MATES DIRECTLY TO PANEL CONNECTORS
JST BHR-04VS-1
Page 1
Microsemi
Integrated Products 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
HI
UNIVERSAL DIMMING INPUT
1
2
3
4
PanelMatchTM StayLitTM
TM (R)
LXMG1626-05-45
5V Dual 6W CCFL Programmable Inverter Module
PRODUCTION DATASHEET
ABSOLUTE MAXIMUM RATINGS (NOTE 1) Input Signal Voltage (VIN).......................................................................................................................................-0.3V to 6V Input Power ......................................................................................................................................................................... 8W Output Voltage, no load ............................................................................................................ Internally Limited to 1500VRMS Output Current (per lamp) ...........................................................................................................6.6mARMS (Internally Limited) Output Power ..................................................................................................................................................................... 6W Input Signal Voltage ( SLEEP Input) ....................................................................................................................-0.3V to 5.5V Input Signal Voltage (BRITE) ...............................................................................................................................-0.3V to 5.5V Ambient Operating Temperature, zero airflow.....................................................................................................-30C to 80C 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, per Lamp) Operating Ambient Temperature Range Symbol VIN PO VBRT_ADJ VLAMP IOLAMP TA Recommended Operating Conditions Min R.C. Max 4.75 4.5 0 385 5.0 -20 5 5 4.5 435 5.25 5.5 5.5 2.0 485 6.0 70 Units V W V VRMS mARMS C
Based on single lamp voltage measurement. At input voltages below 5V the inverter may not be able to output the full 6mARMS per lamp in all configurations.
ELECTRICAL CHARACTERISTICS Unless otherwise specified, the following specifications apply over the recommended operating condition and ambient temperature of 0C to 60C except where otherwise noted. Parameter
OUTPUT PIN CHARACTERISTICS Full Bright Lamp Current (two lamps) Full Bright Lamp Current (two lamps) Output Current Lamp to Lamp Deviation Min. Average Lamp Current Lamp Start Voltage Operating Frequency Burst Frequency FAULT Output Voltage High FAULT Output Voltage Low IL(MAX) IL(MAX) ILL%DEV IL(MIN) VLS fO fBURST FAULTVH FAULTVL VBRT_ADJ > 2.0VDC, SLEEP > 2.0V, VIN = 5VDC ISET = Ground VBRT_ADJ > 2.0VDC, SLEEP > 2.0V, VIN = 5VDC ISET = Open VBRT_ADJ > 2.0VDC, SLEEP > 2.0V, VIN = 5VDC ISET = Open VBRT_ADJ = 0VDC, SLEEP > 2.0V, VIN = 5VDC ISET = Ground; IOUT = IMAX * SQRT of % duty cycle VIN > 4.5VDC VBRT_ADJ = 2.0VDC, FAULT = -10uA FAULT = 10uA
SLEEP
Symbol
Test Conditions
LXMG1626-05-45 Min Typ Max
9 11 10 12 5 1.6 1250 55.2 215 2.9 1400 57.6 225 3.1 0.3 0.8 60 235 11 13
Units
mARMS mARMS
ELECTRICALS ELECTRICALS
% mARMS VRMS kHz Hz V V
> 2.0V, VIN = 5V
Output Burst Frequency
Copyright (c) 2005 Rev. 1.0, 2007-01-24
Microsemi
Integrated Products 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 2
PanelMatchTM StayLitTM
TM (R)
LXMG1626-05-45
5V Dual 6W CCFL Programmable Inverter Module
PRODUCTION DATASHEET
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 BAR INPUT Run Mode Sleep Mode SET INPUT SET Low Threshold Input Current POWER CHARACTERISTICS Sleep Current Run Current Efficiency IIN(MIN) IIN(RUN) VIN = 5VDC, SLEEP < 0.8V VIN = 5VDC, SLEEP 2.0V, ISET = Ground VLAMP = 435VRMS VIN = 5VDC, SLEEP 2.0V, ISET = Ground VLAMP = 435VRMS 0.0 12 1090 80 50 ADC mADC % VL ISET VSET 0.4V -420 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 1 2.0 2.05 ADC ADC VDC VDC
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Symbol
Test Conditions
LXMG1626-05-45 Min Typ Max
Units
VSLEEP
VSLEEP
2.1 -0.3
VIN 0.8
VDC VDC
FUNCTIONAL PIN DESCRIPTION CONN CN1-1 CN1-2 CN1-3 CN1-4 CN1-5 CN1-6 CN1-7 CN1-8 CN2-1 CN2-2 CN2-3 CN2-4 PIN DESCRIPTION CN1 (Molex 53261-0871) 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) 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. SET Connecting this pin to ground decreases the output current (see Table 1) High Impedance Output that indicates lamp status, high indicates fault (see figure 2 on page 5)
SLEEP
BRITE SET FAULT
CN2 for LXMG1626-05-45 (JST SM03(4.0)B-BHS-1-TB(LF)(SN) or Yeon Ho 20015WR-07A00 ) VHI1 VHI2 NC VLO 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. No Connect Connection to low side of lamp. Connect to lamp terminal with longer lead length. DO NOT connect to ground
ELECTRICALS ELECTRICALS
Copyright (c) 2005 Rev. 1.0, 2007-01-24
Microsemi
Integrated Products 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 3
PanelMatchTM StayLitTM
TM (R)
LXMG1626-05-45
5V Dual 6W CCFL Programmable Inverter Module
PRODUCTION DATASHEET
TABLE 1 OUTPUT CURRENT SETTINGS SET1 (Pin 7) Open* Ground Nominal Output Current 12mA 10mA PHYSICAL DIMENSIONS LXMG1626-05-45
113mm
4.45in.
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* If driven by a logic signal it should be open collector or open drain only, not a voltage source.
UNPLATED MOUNTING HOLE 3MM 0.1 DIA. 6MM HEAD CLEARANCE BOTH HOLES
CN1
22mm 0.2
0.866in.
83mm 0.2
3.27in.
CN2
30mm
1.181in.
4.0mm
0.157in.
16mm
0.630in.
GROUNDED MOUNTING HOLE 3MM 0.1 DIA.
1.0mm
0.0394in.
6.5mm
0.265in. Max
weight: 15g
Outside PCB tolerances 0.5mm , 4-40 recommended mounting screws
SIMPLIFIED BLOCK DIAGRAM
PACKAGE DATA PACKAGE DATA
Copyright (c) 2005 Rev. 1.0, 2007-01-24
Microsemi
Integrated Products 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 4
PanelMatchTM StayLitTM
TM (R)
LXMG1626-05-45
5V Dual 6W CCFL Programmable Inverter Module
PRODUCTION DATASHEET
TYPICAL APPLICATION
WWW .Microsemi .C OM
5V DAC or Pot BRITE VIN VHI1 VHI2 LXMG1626-05-45
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 SET FAULT NC NC
GND
VLO
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. Use the SET input to program the desired maximum output current. Generally the best lamp lifetime correlates with driving the CCFL at the manufactures nominal current setting. Typically the SET pin is permanently wired to ground or intentionally left open. However it can also be actively driven, using an open collector, or open drain logic signal. This will allow dynamic adjustment of 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 dimming ratio is a factor of both the burst duty cycle and the peak output current, by using this technique the effective dim ratio can be increased greater than what the burst duty cycle alone could provide. Conversely, the SET input could be used to overdrive the lamp current. Of course, any possible degradation of lamp life from such practices is the user's responsibility since not all lamps are designed to be under or overdriven. Input connector (CN1-8) FAULT signal which is normally low will toggle high to indicate that an output fault condition has occurred as summarized in the table to the left figure 2. FAULT will toggle high if one or both lamps are open or short circuited. If only one lamp opens, or its high side is shorted to ground then the other lamp should continue to operate with the FAULT signal going high. If both lamps open and/or both lamps are shorted the FAULT will toggle high if it is not already high and the inverter output will shutdown. Also if either low side connection of the lamps is shorted to ground, or the lamps are shorted high side to low side, FAULT will go high and the inverter will shutdown. In order to restart the inverter after a fault, it is necessary to toggle the SLEEP input or cycle the VIN input supply. In fault induced shutdown mode the inverter will draw about 15mA from VIN supply.
Figure 1 - Brightness Control (Output current set to maximum)
PWM Signal from System P.W. 10s to 200S
0 < P . W . < 100 % of period
BRITE
LXMG 1626 -05-45
Figure 1A - PWM Brightness Control
5V BRITE VIN VHI1 VHI2 LXMG1626-05-45 SLEEP SET1 FAULT GND VLO
Lamp(s) Status FAULT Inverter Operation Normal Normal full lamp Low Operation current One Lamp Normal @ 1/2 lamp High Open current* Both Lamps High Shutdown Open One Lamp High Normal @ 1/2 lamp Side Short to High current* Ground Both Lamps High Side Short High Shutdown to Ground Figure 2 - FAULT Output Operation
* Under some conditions the second lamp will also shutdown, this is especially true if the inverter draws an arc going open or when shorted.
A APPLICATION
Copyright (c) 2005 Rev. 1.0, 2007-01-24
Microsemi
Integrated Products 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 5
PanelMatchTM StayLitTM
TM (R)
LXMG1626-05-45
5V Dual 6W CCFL Programmable Inverter Module
PRODUCTION DATASHEET
NOTES
WWW .Microsemi .C OM
NOTES NOTES
PRELIMINARY DATA - Information contained in this document is pre-production data and is proprietary to Microsemi. It may not be modified in any way without the express written consent of Microsemi. Product referred to herein is offered in pre-production form only and may not have completed Microsemi's Quality Assurance process for Release to Production. Microsemi reserves the right to change or discontinue this proposed product at any time.
Copyright (c) 2005 Rev. 1.0, 2007-01-24
Microsemi
Integrated Products 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 6

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