PanelMatch™ "A Series" 5V 4W CCFL Programmable Inverter Module ® TM LXMG1618A-05-4x P RODUCTION D ATASHEET KEY FEATURES DESCRIPTION from the system battery, or AC adapter directly to high frequency, high-voltage waveform required to ignite and operate CCFL lamps. A 12V input inverter is also available (LXMG1618A-12-4x). The LXMG1618A modules contain the newer highly integrated LX1691B CCFL backlight controller to provide a wider temperature range (-30°C to 80°C) compared to the existing solutions offered by Microsemi. Other benefits of the inverter’s topology include stable fixed-frequency operation, secondary-side strike voltage regulation and both open/shorted lamp protection with fault timeout. The new LXMG1618A (“A Series”) modules are designed therefore as a higher performance near drop-in replacement (see BRITE minimum input) for those customers and applications currently using the LXMG1618 inverters. IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com Protected By U.S. Patents: 5,923,129; 59320,121; 6,198,234; Patents Pending Externally Programmable Maximum Output Current Easy to Use Brightness Control Output Short-Circuit Protection and Automatic Strike-Voltage Regulation and Timeout Analog Current Amplitude Dimming Method Fixed Frequency Operation Rated From -30°C to 80°C UL60950 E175910 RoHS Compliant WWW . Microsemi .C OM The LXMG1618A-05-4x™ is a Single Output 4W Direct Drive™ CCFL (Cold Cathode Fluorescent Lamp) Inverter Module designed for driving LCD backlight lamps. It is ideal for driving typically 8.4” to 12.1” panels. The maximum output current is externally programmable over a range of 5 to 6.5mA in 0.5mA steps (PanelMatch) 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. LXMG1618A modules unlike the LXMG1617A series do not provide wide range ‘burst’ mode dimming, rather dimming is provided by amplitude control of the output current waveform, and this limits the potential dim range to typically less than 5:1. The module converts a DC voltage APPLICATIONS Medical Instrument Displays Portable Instrumentation Industrial Display Controls BENEFITS 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 PRODUCT HIGHLIGHT UNIVERSAL DIMMING INPUT "PWM", VDC, OR POTENTIOMETER Potentiometer PWM Signal 1 W SELECTABLE MAXIMUM OUPUT CURRENT 5MARMS TO 6.5MARMS PACKAGE ORDER INFO PART NUMBER LXMG1618A-05-41 LXMG1618A-05-42 Copyright © 2008 Rev. 1.1, 2009-11-03 OUTPUT CONNECTOR JST SM02(8.0)B-BHS-1-TB (LF)(SN), Yeon Ho 20015WR-05A00 or equivalent JST SM02B-BHSS-1-TB (LF)(SN), Yeon Ho 35001WR-02A00 or equivalent INVERTER MATES DIRECTLY TO PANEL CONNECTORS JST BHR-03VS-1 JST BHSR-02VS-1 Microsemi Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, 800-877-6458, Fax: 714-893-2570 Page 1 LXMG1618A-05-4X 2 3 DC Voltage Source PanelMatch™ "A Series" 5V 4W CCFL Programmable Inverter Module ® TM LXMG1618A-05-4x P RODUCTION D ATASHEET Input Signal Voltage (VIN) ........................................................................................................................................-0.3V to 6V Input Power ...................................................................................................................................................................... 5.5W Output Voltage, no load ............................................................................................................ Internally Limited to 1600VRMS Output Current ............................................................................................................................7.5mARMS (Internally Limited) Output Power ................................................................................................................................................................... 4.0W Input Signal Voltage ( SLEEP Input) .....................................................................................................................-0.3V to 5.5V Input Signal Voltage (BRITE) ...............................................................................................................................-0.3V to 5.5V Ambient Operating Temperature, zero airflow.....................................................................................................-30°C to 80°C Storage Temperature Range...............................................................................................................................-40°C to 85°C 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. WWW . Microsemi .C OM ABSOLUTE MAXIMUM RATINGS 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, may not function optimally. Parameter Symbol Input Supply Voltage Range (Fully Regulated Lamp Current) Input Supply Voltage Range (Functional) Output Power Linear BRITE Control Input Voltage Range¹ Lamp Operating Voltage Lamp Current (Full Brightness) Operating Ambient Temperature Range VIN PO VBRT_ADJ VLAMP IO(LAMP) TA Recommended Operating Conditions Min R.C. Max 4.75 5 5.25 4.5 5 3.5 5.5 4.0 2.0 635* 6.5 80 0 465 5 -30 550 V W V VRMS mARMS °C ¹ The BRITE minimum input voltage level is 0V, whereas it is 0.65V in the original LXMG1618-05-4x inverter, see application info on page 5. ADJ voltage Units The minimum VBRT depends on the panel characteristics and minimum lamp current specification, depending on the panel it can vary from 0V to 0.5V * Total output power must not exceed 4W. Higher voltage lamps may require maximum output current to be set lower than 6.5mARMS ELECTRICAL CHARACTERISTICS The following specifications apply over the recommended operating condition and ambient temperature of 0°C to 60°C except where otherwise noted. Parameter ` Symbol Test Conditions LXMG1618A-05-4x Min Typ Max Units OUTPUT PIN CHARACTERISTICS fO VBRT_ADJ = 2.0V, SLEEP ≥ 2.0V, VIN = 5V IL(MAX) Full Bright Lamp Current IL(MAX) Full Bright Lamp Current IL(MAX) Full Bright Lamp Current IL(MAX) Min. Average Lamp Current² Lamp Start Voltage Operating Frequency IL(MIN) 4.5 5 5.5 mARMS 5.0 5.5 6.0 mARMS 5.5 6 6.5 mARMS 6.0 6.5 7.0 mARMS 1.6 mARMS 1300 1400 VRMS 76 80 83 kHz ² The Inverter is capable of a lower output current than may be recommended by the panel manufacturer. It is the user responsibility to set the minimum brightness (BRITE) input at or above the panel specification for minimum lamp current. Copyright © 2008 Rev. 1.1, 2009-11-03 Microsemi Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, 800-877-6458, Fax: 714-893-2570 Page 2 ELECTRICALS VLS VBRT_ADJ ≥ 2.0V, SLEEP ≥ 2.0V, VIN = 5V ISET1 = Ground, ISET2 = Ground VBRT_ADJ ≥ 2.0V, SLEEP ≥ 2.0V, VIN = 5V ISET1 = Ground, ISET2 = Open VBRT_ADJ ≥ 2.0V, SLEEP ≥ 2.0V, VIN = 5V ISET1 = Open, ISET2 = Ground VBRT_ADJ ≥ 2.0V, SLEEP ≥ 2.0V, VIN = 5V ISET1 = Open, ISET2 = Open VBRT_ADJ = 0V, SLEEP ≥ 2.0V, VIN = 5V ISET1 = ISET2 = Gnd -30°C < TA < 80°C, VIN > 4.5V Full Bright Lamp Current PanelMatch™ "A Series" 5V 4W CCFL Programmable Inverter Module ® TM LXMG1618A-05-4x P RODUCTION D ATASHEET The following specifications apply over the recommended operating condition and ambient temperature of 0°C to 60°C except where otherwise noted. Parameter ` Symbol ` ` LXMG1618A-05-4x Min Typ Max Units -9 0 µA µA BRITE INPUT Input Current ` Test Conditions IBRT VBRT_ADJ = 0V VBRT_ADJ = 3V Minimum Input for Max. Lamp Current VBRT_ADJ IO(LAMP) = Maximum Lamp Current Maximum Input for Min. Lamp Current³ VBRT_ADJ IO(LAMP) = Minimum Lamp Current Minimum PWM Input Frequency 1.8 2..0 V 0 V FBRT_PWM 2 kHz RUN Mode VSLEEP 2.0 V SLEEP Mode VSLEEP -0.3 WWW . Microsemi .C OM ELECTRICAL CHARACTERISTICS (CONTINUED) SLEEP BAR INPUT 0.8 V SET1,2 INPUT SET1,2 Low Threshold VL Input Current ISET VSET = 0V 0 V -270 µA POWER CHARACTERISTICS Sleep Current IIN(MIN) Run Current IRUN Run Current Ripple Voltage Typical Efficiency IRIPPLE η 5 VIN = 5V, SLEEP ≤ 0.8V VIN = 5V, SLEEP ≥ 2.0V, ISET1 = Open ISET2 = Ground, VLAMP = 550VRMS VIN = 5V, SLEEP ≥ 2.0V, ISET1 = Open ISET2 = Ground, VLAMP = 550VRMS VIN = 5V, SLEEP ≥ 2.0V, ISET1 = Open ISET2 = Ground, VLAMP = 550VRMS 20 µA 830 mA 350 mVpp 80 % ³ The BRITE minimum input voltage level is 0V, whereas it is 0.5V in the original LXMG1618-05-4x inverter. 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 VIN GND Main Input Power Supply (4.75V < VIN < 5.25V) Power Supply Return SLEEP ON/OFF Control. (0V < SLEEP ≤ 0.8V = OFF, SLEEP ≥ 2.0V = ON) CN1-6 BRITE Brightness Control (0V to 2.0V). 2.0V gives maximum lamp current. CN1-7 SET1 SET1 MSB Connecting this pin to ground decreases the output current (see Table 1) CN1-8 SET2 SET2 LSB Connecting this pin to ground decreases the output current (see Table 1) CN2 for LXMG1618A-05-41 and -42 (JST SM02(8.0)B-BHS-1-TB(LF)(SN) ; Yeon Ho 20015WR-05A00 or SM02B-BHSS-1-TB(LF)(SN) ; Yeon Ho 35001WR-02A00) or equivalent CN2-1 VHI High voltage connection to high side of lamp. Connect to lamp terminal with shortest lead length. DO NOT connect to Ground. CN2-2 VLO Connection to low side of lamp. Connect to lamp terminal with longer lead length. DO NOT connect to Ground Copyright © 2008 Rev. 1.1, 2009-11-03 Microsemi Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, 800-877-6458, Fax: 714-893-2570 Page 3 ELECTRICALS CN1-5 PanelMatch™ "A Series" 5V 4W CCFL Programmable Inverter Module ® TM LXMG1618A-05-4x P RODUCTION D ATASHEET TABLE 1 SETTING OUTPUT CURRENT WWW . Microsemi .C OM 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 * If driven by a logic signal it should be open collector or open drain only, not a voltage source. PHYSICAL DIMENSIONS LXMG1618A-05-4X 86mm 71mm 3.39in. MOUNTING HOLE 2.44MM ±0.08 DIA. 2.80in. X CN1 16mm 3.5mm 0.63in. 0.138in. 9mm ±0.2mm 12.5mm 0.354in. 0.492in. Warning High Voltage is present at high side of transformer, its core and the high side of the output connector, please provide at least 2 mm clearance (in all directions) on the component side of the board to any conductor when mounting CN2 W 60mm ± 0.2mm GROUNDED MOUNTING HOLE 2.44MM ±0.08 11mm DIA. 2.36in. 0.433in. 0.8mm ±0.1mm 0.0315in. 6.2mm Max 0.244in. Weight: (6g) typ. R1.0 PCB tolerances ± 0.5mm, M2 or 2-56 recommended mounting screws All dimensions are in millimeters, inches are for reference only SIMPLIFIED BLOCK DIAGRAM High Voltage Transformer 267k V BRITE 0 to 2V Controller & Transformer Driver 71.5k DC 220nF HI V IN OC SENSE PACKAGE DATA +3V V LAMP +3V 10k SET 1 SET 2 Copyright © 2008 Rev. 1.1, 2009-11-03 +3V 10k OV SENSE I SENSE Microsemi Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, 800-877-6458, Fax: 714-893-2570 V LO Page 4 PanelMatch™ "A Series" 5V 4W CCFL Programmable Inverter Module ® TM LXMG1618A-05-4x P RODUCTION D ATASHEET TYPICAL APPLICATION 0V to 2.0V 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 338k pull-up to typically 3V to bias the pot. 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 2V divided by the logic high voltage level; with 3.3V logic level this corresponds to about 60% 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. 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 the peak output current, using this technique the effective dim ratio can be increased. 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) or shorted the inverter will attempt to strike the lamp up to about one second, after which (without success) the inverter will shutdown. Supply current draw in the shutdown mode is about 8mA. In order to restart the inverter it is necessary to toggle the sleep input or cycle the VIN input supply. VIN BRITE VHI 500k LXMG1618A-05-4x SLEEP SET1 SET2 GND CCFL TUBE VLO NC NC Figure 1 – Brightness Control (output current set to maximum) PWM Signal from System BRITE P.W. LXMG1618A-05-4x 10µs to 500µS 0 < P.W. < 100% of period Figure 1A – PWM Brightness Control 5V VIN BRITE VHI CCFL TUBE LXMG1618A-05-4x SLEEP SET1 L L H H SET2 GND VLO 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 © 2008 Rev. 1.1, 2009-11-03 Microsemi Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, 800-877-6458, Fax: 714-893-2570 Page 5 APPLICATION • WWW . Microsemi .C OM 5V DAC or Pot PanelMatch™ "A Series" TM LXMG1618A-05-4x 5V 4W CCFL Programmable Inverter Module ® P RODUCTION D ATASHEET WWW . Microsemi .C OM 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 © 2008 Rev. 1.1, 2009-11-03 Microsemi Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, 800-877-6458, Fax: 714-893-2570 Page 6