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INTEGRATED PRODUCTS
LXM1617-12-6x
12V 6W CCFL Programmable Inverter Module
PRODUCTION DATASHEET
DESCRIPTION
KEY FEATURES
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The LXM1617-12-6x is a Single Output 6W Direct DriveTM CCFL (Cold Cathode Fluorescent Lamp) Inverter Module specifically designed for driving LCD backlight lamps. It is ideal for driving typical 12.1" to 15" TFT panels. LXM1617 modules provide the designer with a vastly superior display brightness range. This brightness range is achievable with virtually any LCD display. The maximum output current is externally programmable over a range of 5 to 8mA in 1mA steps to allow the inverter to properly match to a wide array of LCD panel lamp current specifications. The modules include a dimming input that permits brightness control from a dc voltage source, a PWM signal or an external potentiometer. RangeMAX Digital Dimming Technique provides flicker-free brightness control in any wide range typically (50:1+) dimming application.
The resultant "burst drive" that energizes the lamp was designed specifically to ensure 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. A 5V input inverter is also available (LXM1617-05-6x). The modules design is based on Microsemi's new LX1689 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.
Externally Programmable Maximum Output Current Easy to Use Brightness Control Fixed Frequency Operation Output Short-Circuit Protection and Automatic Strike-Voltage Regulation and Timeout RangeMAX Wide Range Dimming Rated From -20 to 70C UL60950 E175910 APPLICATIONS Notebook And Sub-Notebook Portable Instrumentation 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
PRODUCT HIGHLIGHT
U
N IV E R S A L
D
IM M IN G
IN P U T
"P W M ", V
, O R P O T E N T IO M E T E R DC
DC Voltage Source
Potentiom eter
PW M Signal
2
3
LXM1617-12-6X LXM1617-12-6X
S E L E C T A B L E M A X IM U M O U P U T C U R R E N T 5 M A T O 8MA
RMS
PACKAGE ORDER INFO
PART NUMBER LXM1617-12-61 LXM1617-12-62 LXM1617-12-63
Copyright 2002 Rev. 1.0, 2003-10-14
OUTPUT CONNECTOR JST SM02(8.0)B-BHS-1-TB JST SM02B-BHSS-1-TB Honda QZ-19-A3MYL #02
INVERTER MATES DIRECTLY TO PANEL CONNECTORS JST BHR-03VS-1 JST BHSR-02VS-1 HONDA QZ-19-3F01
Page 1
Microsemi
Integrated Products 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
1
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INTEGRATED PRODUCTS
LXM1617-12-6x
12V 6W CCFL Programmable Inverter Module
PRODUCTION DATASHEET
ABSOLUTE MAXIMUM RATINGS (NOTE 1) Input Signal Voltage (VIN1).....................................................................................................................................-0.3V to 15V Input Power .................................................................................................................................................................... 8.25W Output Voltage, no load ............................................................................................................ Internally Limited to 1800VRMS Output Current .............................................................................................................................10mARMS (Internally Limited) Output Power ................................................................................................................................................................... 6.0W Input Signal Voltage ( SLEEP Input) ..................................................................................................................... -0.3V to VIN1 Input Signal Voltage (BRITE) ...............................................................................................................................-0.3V to 5.5V Ambient Operating Temperature, zero airflow.....................................................................................................-20C to 70C 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 10.8 10.2 0.5 545 5 -20 12 12 640 13.2 13.8 6.0 2.0 735* 8 70 Units V W V VRMS mARMS C
* Total output power must not exceed 6W. Higher voltage lamps may require maximum output current to be set lower than 8mARMS
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 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(MIN) VLS fO fBURST VBRT_ADJ > 2.0VDC, SLEEP > 2.0V, VIN1 = 12VDC ISET1 = Ground, ISET2 = Ground VBRT_ADJ > 2.0VDC, SLEEP > 2.0V, VIN1 = 12VDC ISET1 = Ground, ISET2 = Open VBRT_ADJ > 2.0VDC, SLEEP > 2.0V, VIN1 = 12VDC ISET1 = Open, ISET2 = Ground VBRT_ADJ > 2.0VDC, SLEEP > 2.0V, VIN1 = 12VDC ISET1 = Open, ISET2 = Open VBRT_ADJ 0.5VDC, SLEEP > 2.0V, VIN1 = 12VDC ISET1 = ISET2 = Ground -20C < TA < 70C, VIN1 > 10.8VDC VBRT_ADJ = 2.5VDC, SLEEP > 2.0V, VIN1 = 12V Output Burst Frequency 4.4 5.4 6.4 7.4 5 6 7 8 0.30 1400 57 222 1650 60 234 63 246 5.6 6.6 7.6 8.6 mARMS mARMS
Symbol
Test Conditions
LXM1617-12-6x Min Typ Max
Units
ELECTRICALS ELECTRICALS
mARMS mARMS mARMS VRMS kHz Hz
Copyright 2002 Rev. 1.0, 2003-10-14
Microsemi
Integrated Products 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
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INTEGRATED PRODUCTS
LXM1617-12-6x
12V 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 INPUT RUN Mode SLEEP Mode SET1,2 INPUT SET1,2 Low Threshold Input Current POWER CHARACTERISTICS Sleep Current Run Current Efficiency IIN(MIN) IRUN VIN1 = 12VDC, SLEEP < 0.8V VIN1 = 12VDC, SLEEP 2.0V, ISET1 = Open ISET2 = Ground, VLAMP = 640VRMS VIN1 = 12VDC, SLEEP 2.0V, ISET1 = Open ISET2 = Ground, VLAMP = 640VRMS 0.0 8 428 88 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 0.4 -300 50 2.0 0.5 2.05 ADC ADC VDC VDC
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Symbol
Test Conditions
LXM1617-12-6x Min Typ Max
Units
VSLEEP VSLEEP
2.0 -0.3
5 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 53261-0890) Mates with 51021-0800 housing, 50079-8100 pins. Mates with LX9501 input cable assembly VIN1 GND Main Input Power Supply (10.8V < VIN1 < 13.2V) Power Supply Return ON/OFF Control. (0V < SLEEP < 0.8 = OFF, SLEEP >= 2.0V = ON Brightness Control (0.5V 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
CN2 for LXM1617-12-61 and -62 (JST SM02(8.0)B-BHS-1-TB or SM02B-BHSS-1-TB) 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 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
ELECTRICALS ELECTRICALS
CN2 for LXM1617-12-63 (Honda QZ-19-A3MYL#02) CN2-3 CN2-1
Copyright 2002 Rev. 1.0, 2003-10-14
VHI VLO
Microsemi
Integrated Products 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
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INTEGRATED PRODUCTS
LXM1617-12-6x
12V 6W 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 8.0mA 7.0mA 6.0mA 5.0mA PHYSICAL DIMENSIONS LXM1617-12-6X
100mm 85mm
3.35in 3.94in. MOUNTING HOLE 2.44MM .08 DIA.
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* If driven by a logic signal it should be open collector or open drain only, not a voltage source.
-01 -02
CN-1
16mm
0.63in. 9mm 0.2
0.354in.
12.5mm
0.492in
CN-2
SM02(8.0)B-BHS-1-TB (JST)
SM02B-BHSS-1-TB (JST)
3.5mm
0.138in. 11mm
0.433in.
GROUNDED MOUNTING HOLE 2.44MM .08 DIA.
74mm 0.2mm
2.91in
-03
Warning
High Voltage Present at high side of Transformer and Output Connector 7.5mm Max
0.295in. Weight: (9g) typ. Honda QZ-19-A3MYL #02
1.0mm
0.0394in.
R1.0
PCB tolerances 0.2mm , M2 or 2-56 recommended mounting screws
All Dimensions are in millimeters, inches for reference only. SIMPLIFIED BLOCK DIAGRAM
+3V Controller VBRITE 0.5 2VDC 10K Comparator + Ramp +3V 10K SET1 +3V 10K
High Voltage Transformer
VIN1
VHI
Transformer Driver
PACKAGE DATA PACKAGE DATA
Ramp Gen
OCSENSE
OVSENSE ISENSE LXM1617 family
VLO
SET2
Copyright 2002 Rev. 1.0, 2003-10-14
Microsemi
Integrated Products 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
LAMP
Page 4
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INTEGRATED PRODUCTS
LXM1617-12-6x
12V 6W CCFL Programmable Inverter Module
PRODUCTION DATASHEET
TYPICAL APPLICATION
12V DAC or Pot 0.45V 20K to 2.0V 1.8K BRITE VIN1 VHI LXM1617-12-6x CCFL TUBE
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The brightness control may be a voltage output DAC or other voltage source, a digital pot or 20K manual pot. The inverter contains an internal 10K pull-up to 3V to bias the pot add a 1.8K resistor to set the lower threshold voltage. A 3.3V Logic Level PWM signal from a micro-controller 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. 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 manufactures. Generally the best lamp lifetime correlates with driving the CCFL at the manufactures 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 a 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 users 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) or shorted the inverter will attempt to strike the lamp for several seconds. After about 2 to 4 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.
SLEEP SET1 SET2 NC NC
GND
VLO
Figure 1 - Brightness Control (Output current set to maximum)
PWM Signal from System P.W. 10s to 125S 0 < P.W. < 100% of period
BRITE
LXM1617-12-6x
Figure 1A - PWM Brightness Control
12V BRITE VIN1 VHI CCFL TUBE VLO
LXM1617-12-6x SLEEP SET1 SET2 GND
APPLICATION APPLICATION
L 5.0mARMS H 6.0mARMS L 7.0mARMS H 8.0mARMS L=GND; H=Open Figure 2 - Max Output Current (SET1 and SET2 Inputs)
L L H H
Copyright 2002 Rev. 1.0, 2003-10-14
Microsemi
Integrated Products 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
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PanelMatchTM
INTEGRATED PRODUCTS
LXM1617-12-6x
12V 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 2002 Rev. 1.0, 2003-10-14
Microsemi
Integrated Products 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
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