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PanelMatchTM RangeMAXTM LXMG1627-05-44
TM (R)
5V Dual 4W CCFL Programmable Inverter Module
PRODUCTION DATASHEET
DESCRIPTION
KEY FEATURES
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The LXMG1627-05-44 is a Dual 4W Output Direct DriveTM CCFL (Cold Cathode Fluorescent Lamp) Inverter Module specifically designed to be compatible with the Sharp LQ104S1DG51 /61 10.4", LQ121S1DG41/61 12.1" as well as the 10.4" Toshiba Matsushita LTA104D182F/183F and the Samsung LTM121SI-T01 12.1" or similar dual lamp displays that have individual lamp output connectors on one side of the panel. LXMG1627 modules provide the designer with a vastly superior display brightness range. The RangeMAXTM Digital Dimming Technique supplies flicker-free brightness control for any wide range (typically 50:1+) dimming application. The included dimming input permits brightness control from either, a DC voltage source, a PWM signal or an external potentiometer. The maximum output current is externally programmable (through the input connector) over a range of 5mA to 6.5mA in 0.5mA steps.
This allows the inverter to match the panel's lamp current specifications. The modules convert a 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 version is also available: LXMG1627-12-44. The module's design utilizes 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/shorted lamp protection with fault timeout for open lamp condition. The new LXMG1627-xx-44 modules are designed therefore as a wider temperature range near drop-inreplacement for the LXMG1623-xx-44 inverters, the major difference being the input voltage adjustment range of the BRITE (dimming) pin.
Externally Programmable Maximum Output Current Easy to Use Brightness Control RangeMAX Wide Range Dimming Output Open & Short-Circuit Protection and Automatic Strike-Voltage Regulation and Timeout Fixed Frequency Operation Rated From -30C to 80C UL60950 E175910 Pending RoHS Compliant
APPLICATIONS
LCD's Requiring Both Output Connectors on One Side of Panel Sharp LQ104S1DG51/61 and LQ121S1DG41/61 Samsung LTM121SI-T01 Toshiba Matsushita LTA104D182F/183F Desktop Displays Industrial Display Controls
BENEFITS
Smooth, Flicker Free 2%-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
UNIVERSAL DIMMING INPUT
"PWM", VDC,
OR
POTENTIOMETER
500k
DC Voltage Source
Potentiometer
PWM Signal
1 2 3 1 2 3
LXMG1627-05-44
SELECTABLE MAXIMUM OUTPUT CURRENT 5.0MARMS TO 6.5MARMS
PACKAGE ORDER INFO
PART NUMBER
LXMG1627-05-44
OUTPUT CONNECTOR
JST SM02(8.0)B-BHS-1-TB (LF)(SN) or Yeon Ho 20015WR-05A00 or equivalent
INVERTER MATES DIRECTLY TO PANEL CONNECTORS
JST BHR-03VS-1
Copyright (c) 2008 Rev. 1.0, 2008-12-04
Microsemi
Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, 800-877-6458, Fax: 714-893-2570
Page 1
PanelMatchTM RangeMAXTM LXMG1627-05-44
TM (R)
5V Dual 4W CCFL Programmable Inverter Module
PRODUCTION DATASHEET
ABSOLUTE MAXIMUM RATINGS Input Signal Voltage (VIN) ........................................................................................................................................-0.3V to 6V Input Power ....................................................................................................................................................................... 10W Output Voltage, no load.............................................................................................................Internally Limited to 1800VRMS Output Current..............................................................................................................................................................9mARMS Output Power (each output) ............................................................................................................................................. 4.0W 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 Operating Relative Humidity, non-condensing ................................................................................................................ 90% 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, might not function optimally. Parameter Symbol Recommended Operating Conditions Min R.C. Max 5.25 5.5 4.0 2.5 610 6.5 80 Units V W V VRMS mARMS C
Input Supply Voltage Range (Fully Regulated 4.75 5 Lamp Current) VIN Input Supply Voltage Range (Functional) 4.5 5 3.5 Output Power (each output) PO Linear BRITE Control Input Voltage Range VBRT_ADJ 0 Lamp Operating Voltage VLAMP 450 530 Lamp Current (Full Brightness) IOLAMP 5.0 Operating Ambient Temperature Range TA -30 The BRITE minimum input voltage level is 0V to 2.5V, whereas it is 0.5V to 2.0V in the LXMG1623-05-44 inverter.
At input voltages below 5V the inverter may not be able to output the full 6.5mARMS 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, BRITE 2.5V, SLEEP > 2.0V, VIN = 5V except where otherwise noted. LXMG1627-05-44 Parameter Symbol Test Conditions Units Min Typ Max
OUTPUT PIN CHARACTERISTICS Full Bright Lamp Current (each output) Full Bright Lamp Current (each output) Full Bright Lamp Current (each output) Full Bright Lamp Current (each output) Output Current Lamp to Lamp Deviation Min. Average Lamp Current (each output) Lamp Start Voltage Operating Frequency Burst Frequency IL(MAX) IL(MAX) IL(MAX) IL(MAX) ILL%DEV IL(MIN) VLS fO fBURST Output Burst Frequency SET1 = Ground, SET2 = Ground SET1 = Ground, SET2 = Open SET1 = Open, SET2 = Ground SET1 = Open, SET2 = Open SET1 = Open, SET2 = Open BRITE = 0V, SET1 = SET2 = Ground, IL(MIN) = ILMAX * Burst Duty Cycle -30C < TA < 80C, VIN > 4.75V 0.7 1400 54 198 4.5 5.0 5.5 6.0 5.0 5.5 6.0 6.5 3 1.2 1600 60 233 66 268 5.5 6.0 6.5 7.0 10 1.7 mARMS mARMS mARMS
ELECTRICALS ELECTRICALS
mARMS % mARMS VRMS kHz Hz
Copyright (c) 2008 Rev. 1.0, 2008-12-04
Microsemi
Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, 800-877-6458, Fax: 714-893-2570
Page 2
PanelMatchTM RangeMAXTM LXMG1627-05-44
TM (R)
5V Dual 4W 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 0C to 60C, BRITE 2.5V, SLEEP > 2.0V, VIN = 5V except where otherwise noted. Parameter
Input Current Minimum Input for Max. Lamp Current Maximum Input for Min. Lamp Current 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 Lamps) Supply Current After Fault Timeout Efficiency IIN(MIN) IIN(RUN) TS_DWELL IFAULT Fault Timeout SET1 = Open, SET2 = Ground, VLAMP = 530VRMS VL ISET SETx = 0V 0 -420 V A
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Symbol
IBRT VBRT_ADJ VBRT_ADJ FBRT_PWM BRITE = 0V BRITE = 2.5V
Test Conditions
LXMG1627-05-44 Min Typ Max
-18 -7 2.1 0 2.3 2.5
Units
A A V V kHz
IO(LAMP) = Maximum Lamp Current IO(LAMP) = Minimum Lamp Current %BRT_PWM < 50% (Visual Artifact Avoidance)
8
2.0 0 VIN 0.8
VSLEEP
VSLEEP
V V
SLEEP 0.8V
SET1 = Open, SET2 = Ground, VLAMP = 530VRMS 1.0
5 1460 1.3
20
A mA
2
Sec mA %
7
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 CN1-5 CN1-6 CN1-7 CN1-8 CN2-1 CN3-1 CN2-2 CN3-2 VIN GND
SLEEP
Main Input Power Supply (4.75V VIN 5.25V) Power Supply Return ON/OFF Control. (0V SLEEP 0.8 = OFF, SLEEP 2.0V = ON) Brightness Control (0V to 2.5V). 2.5V insures maximum lamp current.
BRITE SET1 SET2
ELECTRICALS ELECTRICALS
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) 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
CN2, CN3 for LXMG1627-05-44 (JST SM02(8.0)B-BHS-1-TB (LF)(SN) or Yeon Ho 20015WR-05A00 or equivalent) VHI VLO
Copyright (c) 2008 Rev. 1.0, 2008-12-04
Microsemi
Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, 800-877-6458, Fax: 714-893-2570
Page 3
PanelMatchTM RangeMAXTM LXMG1627-05-44
TM (R)
5V Dual 4W CCFL Programmable Inverter Module
PRODUCTION DATASHEET
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 PHYSICAL DIMENSIONS LXMG1627-05-44
108.7mm
4.28in.
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* If driven by a logic signal it should be open collector or open drain only, not a voltage source.
10.5mm
0.413in.
CN1 1
85.75mm 0.2mm
3.375in.
19.45mm
0.765in.
22.35mm
0.88in.
8
GROUNDED MOUNTING HOLE
3.05MM X 2 DIA. 0.08 6MM SCREW HEAD CLEARANCE Outside dimension PCB tolerances 0.5mm
1.0mm 0.1
0.0394in.
Warning High Voltage is present CN3 CN2 at high side of 12.7mm transformer, its core and 0.2mm the high side of the 0.500in. output connectors, 6.75mm please provide at least 2 0.266in. mm clearance (in all PLASTIC SCREW REQUIRED directions) on the component side of the board to any conductor when mounting 10.2 mm
0.402in Max Weight: (18g) typ.
Dimensions are in millimeters (inches are for reference only)
SIMPLIFIED BLOCK DIAGRAM
+4.2V Controller VBRITE 0 - 2.5V 191k Comparator + 43.2k Ramp +4.2V 10k SET1 +4.2V 10k SET2 VLO LAMP1 Z
High Voltage Transformer
VIN
VHI
VHI
Transformer Driver
Ramp Gen
OVSENSE
LAMP2
VHI
PACKAGE DATA PACKAGE DATA
ISENSE
Z
VLO
Copyright (c) 2008 Rev. 1.0, 2008-12-04
Microsemi
Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, 800-877-6458, Fax: 714-893-2570
Page 4
PanelMatchTM RangeMAXTM LXMG1627-05-44
TM (R)
5V Dual 4W CCFL Programmable Inverter Module
PRODUCTION DATASHEET
TYPICAL APPLICATION
5V DAC or Pot 0V to 2.5V BRITE VIN LAMPHI 500k LXMG1627-05-44 CCFL TUBE
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SLEEP SET1 SET2 NC NC
LAMPLO GND One of Two
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 191k pull-up resistor in series with 43.2k to 4.2V to bias the pot (see block diagram). 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 If you need to turn the inverter ON/OFF remotely, connect to TTL logic signal to the SLEEP input. 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 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. 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 for about 1.3 seconds, without success the inverter will shutdown. In order to restart the inverter it is necessary to toggle the sleep input or cycle the VIN input supply. If either high side lamp output is directly connected to ground the inverter will immediately shutdown.
Figure 1 - Brightness Control (Output current set to maximum)
PWM Signal from System P.W.
BRITE
LXMG1627-05-44 2.5s to 125S 0 < P.W. < 100% of period
Figure 1A - PWM Brightness Control
5V BRITE VIN VHI CCFL TUBE VLO ONE OF TWO
LXMG1627-05-44 SLEEP SET1 SET2 GND
APPLICATION APPLICATION
L 5.0mARMS H 5.5mARMS L 6.0mARMS H 6.5mARMS L=GND; H=Open Figure 2 - Max Output Current (SET1 and SET2 Inputs)
Copyright (c) 2008 Rev. 1.0, 2008-12-04
L L H H
Microsemi
Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, 800-877-6458, Fax: 714-893-2570
Page 5
PanelMatchTM RangeMAXTM LXMG1627-05-44
TM (R)
5V Dual 4W 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, 2008-12-04
Microsemi
Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, 800-877-6458, Fax: 714-893-2570
Page 6

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