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INTEGRATED PRODUCTS
LXM1623-05-6x
5V Dual 6W Programmable CCFL Inverter Module
PRODUCTION DATASHEET
DESCRIPTION
KEY FEATURES
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The LXM1623-05-6x is a Dual 6W Output Direct DriveTM CCFL (Cold Cathode Fluorescent Lamp) Inverter Module specifically designed for driving LCD backlight lamps. It is ideal for driving typical 10.4" to 15" TFT panels. LXM1623 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 or a PWM signal or external Potentiometer. 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. 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 12V input inverter is also available (LXM1623-12-6x), as well as 4W versions (LXM1623-xx-4x) for driving smaller lower voltage panels. 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 RangeMAX Wide Range Dimming Output Open/Short-Circuit Protection and Automatic StrikeVoltage Regulation and Timeout Fixed Frequency Operation Rated From -20 to 70C UL60950 E175910
APPLICATIONS
High Brightness Displays 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
Protected By U.S. Patents: 5,923,129; 5,930,121; 6,198,234; Patents Pending
PRODUCT HIGHLIGHT
U N I V E R S A L D I M M IN G IN P U T
"P W M ", V DC,
OR
P O T E N T IO M E T E R
D C V o lta g e S o u rc e
P o te n tio m e te r
PW M S ig n a l
2
3
S E L E C T A B L E M A X IM U M O U T P U T C U R R E N T 5 M A TO 8M A RMS
PACKAGE ORDER INFO
PART NUMBER LXM1623-05-61 LXM1623-05-62 LXM1623-05-63
Copyright (c) 2002 Rev. 1.0b, 2005-01-17
OUTPUT CONNECTOR JST SM02(8.0)B-BHS-1-TB or Yeon Ho 20015WR-05A00 JST SM02B-BHSS-1-TB or Yeon Ho 35001WR-02A00 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
1 2 3
LXM1623-05-6X LXM1623-05-6X
PanelMatchTM
INTEGRATED PRODUCTS
LXM1623-05-6x
5V Dual 6W Programmable CCFL Inverter Module
PRODUCTION DATASHEET
ABSOLUTE MAXIMUM RATINGS (NOTE 1) Input Signal Voltage (VIN1)....................................................................................................................................-0.3V to 6.5V Input Power ....................................................................................................................................................................... 15W Output Voltage, no load ............................................................................................................ Internally Limited to 1800VRMS Output Current (each output) ......................................................................................................9.5mARMS (Internally Limited) Output Power (each output) ............................................................................................................................................. 6.0W 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 (each output) 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 0.5 480 5 -20 5 5 5.5 600 5.25 5.5 6.0 2.0 720 8 70 Units V W V VRMS mARMS C
At input voltages below 5V the inverter may not be able to output the full 8mARMS in all configurations
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 (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 Copyright (c) 2002 Rev. 1.0b, 2005-01-17 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 0.5VDC, SLEEP > 2.0V, VIN1 =5VDC ISET1 = ISET2 = Ground -20C < TA < 70C, VIN1 > 4.75VDC VBRT_ADJ = 2.5VDC, SLEEP > 2.0V, VIN1 = 5V Output Burst Frequency 4.4 5.4 6.4 7.4 5 6 7 8 3 0.30 1400 66 257 1650 70 273 73 286 5.6 6.6 7.6 8.6 10 mARMS mARMS
Symbol
Test Conditions
LXM1623-05-6x Min Typ Max
Units
ELECTRICALS ELECTRICALS
mARMS mARMS % mARMS VRMS kHz Hz Page 2
Microsemi
Integrated Products 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
PanelMatchTM
INTEGRATED PRODUCTS
LXM1623-05-6x
5V Dual 6W Programmable CCFL 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 Input Voltage for Max. Lamp Current Input Voltage 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 = Open ISET2 = Ground, VLAMP = 600VRMS VIN1 = 5VDC, SLEEP 2.0V, ISET1 = Open ISET2 = Ground, VLAMP = 600VRMS 0.0 4 2100 80 30 ADC mADC % VL ISET 0.4 VSET 0.4V -300 V A IBRT VBRT_ADJ VBRT_ADJ VBRT_ADJ = 0VDC VBRT_ADJ = 3VDC IO(LAMP) = Maximum Lamp Current IO(LAMP) = Minimum Lamp Current -300 50 2.0 0.5 ADC ADC VDC VDC VDC VDC
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Symbol
Test Conditions
LXM1623-05-6x Min Typ Max
Units
2.05
0.4 2.0 -0.3
VSLEEP VSLEEP
VIN1 0.8
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 (4.75V < VIN1 < 5.25V) 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, CN3 for LXM1623-05-61 and -62 (JST SM02(8.0)B-BHS-1-TB | Yeon Ho 20015WR-05A00 or SM02B-BHSS-1-TB | 35001WR-02A00)
ELECTRICALS ELECTRICALS
CN2-1 CN3-1 CN2-2 CN3-2 CN2-3 CN3-3 CN2-1 CN3-1
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
CN2, CN3 for LXM1623-05-63 (Honda QZ-19-A3MYL #02) VHI VLO
Copyright (c) 2002 Rev. 1.0b, 2005-01-17
Microsemi
Integrated Products 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 3
PanelMatchTM
INTEGRATED PRODUCTS
LXM1623-05-6x
5V Dual 6W Programmable CCFL 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
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* If driven by a logic signal it should be open collector or open drain only, not a voltage source.
PHYSICAL DIMENSIONS LXM1623-05-6X
GROUNDED MOUNTING HOLE 3MM .08 DIA.
165mm 151mm
5.945 in. 6.496 in.
6MM HEAD CLEARANCE BOTH HOLES
3mm
0.118 in.
MOUNTING HOLE 3MM .08 DIA.
CN2
21mm
0.827in.
CN1 CN3
18mm
0.7087 in.
14mm
0.551 in.
1mm
0.0394 in.
137mm
5.3937 in.
7.5mm Max
0.295in.
Warning
weight: 20g
PCB tolerances 0.5mm , 4-40 recommended mounting screws
High Voltage Present at high side of Transformers and Output Connectors
Dimensions are in millimeters (inches for reference only) SIMPLIFIED BLOCK DIAGRAM
+3V Controller V BRIT E 0.5 2V DC 10K Comparator + Ramp +3V 10K SET 1 +3V 10K
High Voltage Transform er
V IN1
V HI
Transform er Driver
PACKAGE DATA PACKAGE DATA
Ram p Gen
OC SENSE
OV SENSE I SENSE
O ne of two V LO
SET 2
Copyright (c) 2002 Rev. 1.0b, 2005-01-17
Microsemi
Integrated Products 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
LAMP
Page 4
PanelMatchTM
INTEGRATED PRODUCTS
LXM1623-05-6x
5V Dual 6W Programmable CCFL Inverter Module
PRODUCTION DATASHEET
TYPICAL APPLICATION
5V DAC or Pot 0.45V 20K to 2.0V 1.8K LXM1623-05-6x BRITE V IN1
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V HI CCFL TUBE
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 SET 1 SET 2 NC NC
GND
V LO
ONE OF TW O
Figure 1 - Brightness Control (Output current set to maximum)
PW M Signal from System P.W .
BRITE
LXM1623-05-6x 10us to 125uS
0 < P.W. < 100% of period
Figure 1A - PWM Brightness Control
5V BRITE V IN1
V HI CCFL TUBE V LO ONE OF TW O
LXM1623-05-6x SLEEP SET 1 SET 2 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 (c) 2002 Rev. 1.0b, 2005-01-17
Microsemi
Integrated Products 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 5
PanelMatchTM
INTEGRATED PRODUCTS
LXM1623-05-6x
5V Dual 6W Programmable CCFL Inverter Module
PRODUCTION DATASHEET
NOTES
WWW .Microsemi .C OM
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) 2002 Rev. 1.0b, 2005-01-17
Microsemi
Integrated Products 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
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