LMX1622-12-03

LXM1622-12-XX MICROSEMI | Alldatasheet

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Linfinity Microelectronics Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 1Copyright  2000 WWW. Microsemi .COM RangeMAX  LXM1622-12-xx D UAL 5W, DIGITAL D IMMING CCFL INVERTER M ODULE P RELIMINARY D ATA S HEET A MICROSEMI COMPANY /G01/G02/G03/G04/G05/G06/G07/G08/G06/G09/G0A/G01/G02/G03/G04/G05/G06/G07/G08/G06/G09/G0A RangeMAX  Wide Range Dimming, Dual Output Inverter. The LMX1622 series of Direct Drive CCFL (Cold Cathode Fluorescent Lamp) Inverter Modules are specifically designed for driving two lamp LCD displays. They are available in two power and input voltage ranges. LMX1622 modules provide the designer with a vastly superior display brightness range. This brightness range is achievable with virtually any LCD display. RangeMAX Digital Dimming Technique. Digital dimming provides flicker-free brightness control in any wide range (100:1+) dimming application. The modules are available with a dim- ming input that permits brightness control from either a DC voltage source or a PWM signal. The resultant “burst drive” that energizes the lamp was designed specifically to ensure that no premature lamp degradation occurs (See the “How RangeMAX Works” section). Input Voltage Range. The modules convert the DC voltage from a fixed 12V supply directly to high frequency, high- voltage waves required to ignite and operate CCFL lamps. A 5V input inverter is also available; LXM1612-05 series. Direct Drive Technology. The modules design is based on a new Direct Drive topology, which provides a number of cost and performance advantages. Additional Features. Other benefits of this new topology are fixed-frequency operation, secondary-side strike-voltage regulation, and both open and shorted lamp protection. If lamp fails to strike the inverter will timeout and shutdown. IMPORTANT: For the most current data, consult MICROSEMI ’s website: http://www.microsemi.com /G0C/G02/G0D /G0E/G02/G0F/G08/G10/G05/G02/G03/G0C/G02/G0D /G0E/G02/G0F/G08/G10/G05/G02/G03 /G01 RangeMAX Wide Range Dimming /G01 Fixed 5V input /G01 Easy to Use Brightness Control /G01 Output Short-Circuit Protection and Automatic Strike-Voltage Regulation and Timeout /G01 Fixed Frequency Operation /G01 Microamp SLEEP mode /G0F/G07/G07/G11/G06/G04/G0F/G08/G06/G09/G0A/G03/G0F/G07/G07/G11/G06/G04/G0F/G08/G06/G09/G0A/G03 /G01 Notebook Sub-Notebook Computers /G01 Portable Instrumentation /G01 Low Ambient Light /G12/G02/G0A/G02/G0E/G06/G08/G03/G12/G02/G0A/G02/G0E/G06/G08/G03 /G01 Smooth, Flicker Free 1-100% Full-Range Brightness Control /G01 Output Open Circuit Voltage Regulation Minimizes Corona Discharge For High Reliability /G01 Power Efficient, “Low Brightness” Capability Allows For Advanced Power Management /G07/G05/G09/G01/G10/G04/G08 /G13/G06/G14/G13/G11/G06/G14/G13/G08/G07/G05/G09/G01/G10/G04/G08 /G13/G06/G14/G13/G11/G06/G14/G13/G08 123 /G01 1 2 3 /G01 DC Voltage Source Potentiom eter PWM Signal /G01 /G02 /G03/G04 /G05/G06 /G07/G08 /G02/G09 /G09 /G02/G01 /G0A /G01/G0B /G0C/G0D /G15/G07 /G16 /G17 /G15/G18 /G19 /G01/G02 /G18 /G01/G02 /G07 /G01 /G03 /G04/G05 /G03/G06 /G01 /G07 /G04/G03/G04 /G02 /G01/G02/G03/G04/G05/G06 /G02/G08/G03/G06/G08 /G09/G0A/G0B/G02 PART N UMBER L AMP C URRENT L AMP RUN VOLTAGE O UTPUT C ONNECTOR INVERTER M ATES D IRECTLY TO PANEL C ONNECTORS LMX1622-12-01 6.5mA 500-750 JST SM02(8.0)B-BHS-1-TB BHR-03VS-1 LMX1622-12-02 5.5mA 350-550 JST SM02(8.0)B-BHS-1-TB BHR-03VS-1 LMX1622-12-03 5.5mA 350-550 Honda QZ-19-A3MYL #02 QZ-19-3F01 LLXXMM11662222--1122--XXXX BRITE

Linfinity Microelectronics Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 2Copyright  2000 WWW. Microsemi .COM RangeMAX  LXM1622-12-xx D UAL 5W, DIGITAL D IMMING CCFL INVERTER M ODULE P RELIMINARY D ATA S HEET A MICROSEMI COMPANY /G0F/G12/G03/G09/G11/G10/G08/G02 /G17/G0F/G1A/G06/G17/G10/G17 /G05/G0F/G08/G0F/G12/G03/G09/G11/G10/G08/G02 /G17/G0F/G1A/G06/G17/G10/G17 /G05/G0F/G08 /G06/G0A/G14/G03/G1B/G0A/G09/G08/G02 /G1C/G1D/G06/G0A/G14/G03/G1B/G0A/G09/G08/G02 /G1C/G1D /G05/G02/G04/G09/G17/G17/G02/G0A/G01/G02/G01 /G09/G07/G02/G05/G0F/G08/G06/G0A/G05/G02/G04/G09/G17/G17/G02/G0A/G01/G02/G01 /G09/G07/G02/G05/G0F/G08/G06/G0A /G14 /G04/G09/G0A/G01/G06/G08/G06/G09/G0A/G03/G14 /G04/G09/G0A/G01/G06/G08/G06/G09/G0A/G03 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 operational, will not function optimally. Recommended Operating Conditions Parameter Symbol Min R.C. Max Units VIN Voltage Range V IN 10.8 12.0 13.2 V Output Power (-01) P O 5.8 8 10.8 W Output Power (-02,-03) P O 3 5 6 W Brightness Control Input Voltage Range V BRT_ADJ 0.0 2.5 V Lamp Operating Voltage (-01) V LAMP 500 625 750 V RMS Lamp Operating Voltage (-02,-03) V LAMP 300 425 500 V RMS Lamp Current Full Brightness (-01) I OLAMP 6.5 mA RMS Lamp Current Full Brightness (-02,-03) I OLAMP 5.5 mA RMS Operating Ambient Temperature Range T A 0 70 °C /G02/G11/G02/G04/G08/G05/G02/G11/G02/G04/G08/G05 /G06/G04/G0F/G11 /G04/G13/G0F/G05/G0F/G04/G08/G02/G05/G06/G03/G08/G06/G04/G03/G06/G04/G0F/G11 /G04/G13/G0F/G05/G0F/G04/G08/G02/G05/G06/G03/G08/G06/G04/G03 Unless otherwise specified, these specifications apply over the recommended operating conditions and 25°C ambient temperature for the LMX1622-12-xx. LXM1622-12-xx Parameter Symbol Test Conditions Min Typ Max Units /G01 OUTPUT PIN CHARACTERISTICS Full Bright Lamp Current (-01) I L(MAX) V BRT_ADJ = 2.25V 5.85 6.5 7.15 mA RMS Full Bright Lamp Current (-02,-03) I L(MAX) V BRT_ADJ = 2.25V 4.95 5.5 6.05 mA RMS Min. Average Lamp Current (Note 2) I L(MIN) V BRT_ADJ = 0VDC .25 mA RMS Lamp Start Voltage V LS 1350 1500 1800 V RMS Operating Frequency F O V BRT_ADJ = 2.25VDC 66 76 86 KHz Fault Timeout T FAULT 1.6 SEC /G01 BRITE INPUT Linear Dim Control Range V BRT .25 2.2 V DC V BRT_ADJ = 0VDC -680 -710 -730 µA DC Input Current I BRT VBRT_ADJ = 2.5VDC 196 203 220 µA DC Input Voltage for Max. Lamp Current V BRT_ADJ I O(LAMP) = 100% Duty Cycle 2.25 2.5 V DC Input Voltage for Min. Lamp Current V BRT_ADJ I O(LAMP) = Minimum Duty Cycle 0 0.25 V DC /G01 SLEEP INPUT RUN Mode V SLEEP V IN=12V 1.5 V DC OFF Mode V SLEEP V IN=12V -0.3 0.8 V DC SLEEP=5.0V 400 425 450 Input Current II SLEEP SLEEP=0.0V 0 uA /G01 VSYNC CHARACTERISTICS Logic High Level V SYNC (HI) VIN=12V 1.5 V DC Logic Low Level V SYNC (LO) V IN=12V 0 0.8 V DC Input Impedance Z IN 27 KΩ Input Frequency FV SYNC 50 150 Hz Free Run Frequency F BURST Output Burst Rate; VSYNC =0V 190 250 310 Hz EELLEECCTTRRIICCAALLSS 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.

Linfinity Microelectronics Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 3Copyright  2000 WWW. Microsemi .COM RangeMAX  LXM1622-12-xx D UAL 5W, DIGITAL D IMMING CCFL INVERTER M ODULE P RELIMINARY D ATA S HEET A MICROSEMI COMPANY /G02/G11/G02/G04/G08/G05/G06/G04/G0F/G11 /G04/G13/G0F/G05/G0F/G04/G08/G02/G05/G06/G03/G08/G06/G04/G03 /G1B/G04/G09/G0A/G08/G06/G0A/G10/G02/G01/G1D Unless otherwise specified, these specifications apply over the recommended operating conditions and 25°C ambient temperature for the LMX1622-12-xx. LMX1622-12-xx Parameter Symbol Test Conditions Min Typ Max Units /G01 POWER CHARACTERISTICS Run Current (LXM1622-12-01) IRUN V IN=12V,VBRT_ADJ = 2.25V, VLAMP = 625VRMS 800 mA Run Current (LXM1622-12-02,03)) I RUN V IN=12V,VBRT_ADJ = 2.25V, VLAMP = 425VRMS 450 mA Sleep Current I SLEEP V IN = 12V, SLEEP = 0.0V 0.0 0.5 10 µA Note 2: Minimum lamp current required to maintain even light output may vary with display panel. Average RMS current = (burst duty cycle) X (burst amplitude of full lamp current /G0E/G10/G0A/G04/G08/G06/G09/G0A/G0F/G11 /G07/G06/G0A /G01/G02/G03/G04/G05/G0E/G10/G0A/G04/G08/G06/G09/G0A/G0F/G11 /G07/G06/G0A /G01/G02/G03/G04/G05 /G06/G07/G08/G06/G09/G0A/G06/G07/G08/G06/G09/G0A Conn. Pin Description CN1 (Molex 53261-0890) * CN1-1,2 V IN Main Input Power Supply (10.8V to 13.2V) CN1-3,4 GND Power Supply Return CN1-5 SLEEP >1.5V(Backlight on), <0.8V (backlight off), IISLEEP =425uA @ 5.0V, disabled if left open CN1-6 BRITE Brightness Control (0.25- 2.2VDC) 2.25VDC gives maximum lamp current CN1-7 BRITE RTN Signal Ground (0Vdc) CN1-8 V SYNC Vertical Synchronization Input (50 < fSYNC > 150Hz), minimum pulse width 10uS CN2,3 for LMX1622-12-01, 02 (JST SM02(8.0)B-BHS-1-TB) CN2-1 V HI High Voltage Connection to High Side of Lamp. Connect to lamp terminal with shortest lead length. DO NOT connect to Ground. CN2-2 V LO Connection to Low Side of Lamp. Connect to lamp terminal with longer lead length. DO NOT connect to Ground. CN2,3 for LMX1622-12-03 (Honda QZ-19-AMYL#02) CN2-3 V HI High Voltage Connection to High Side of Lamp. Connect to lamp terminal with shortest lead length. DO NOT connect to Ground. CN2-1 V LO Connection to Lower Side of Lamp. Connect to lamp terminal with longer lead length. DO NOT connect to Ground. * LX9501 Mating Connector Assembly Available /G07/G13/G0D/G03/G06/G04/G0F/G11 /G01/G06/G17/G02/G0A/G03/G07/G13/G0D/G03/G06/G04/G0F/G11 /G01/G06/G17/G02/G0A/G03 /G06/G09/G0A/G03/G06/G09/G0A/G03 /G05/G0C/G01/G0D/G0E/G0F/G0F/G10/G0D/G0F/G10/G0C/G0C All dimensions are in inches (mm) 0.24in. 6mm CN1 4.88in. 124mm CN2 CN3 CN3 .229in. 7.6mm CN2 1.50in. 38mm 1.89in. 48mm 0.060in. 1.52mm 0.118in. 3mm 0.078in. 2mm SM02(8.0)B-BHS-1-TB (JST) Honda QZ-19-AMYL#02 CN2, CN3 (Connector Type) /G01 1.26in. 32mm 0.068in. 1.75mm 0.118in. 3mm /G01/G02/G03/G04/G05 /G04/G06 /G01 /G02 /G03 /G04 /G06 /G07/G08 /G09/G0A/G03/G0B /G0C /G0D/G0B /G0E/G0B/G0F /G09 /G0A /G09 /G0A/G08 /G08 /G10 /G11/G09/G12/G11/G09 /G13/G07/G0F /G0F /G0B/G14/G09/G07/G0D/G0E 3 1 Weight: 24.5 (g) typ. PPAACCKKAAGGEE DDAATTAA

Linfinity Microelectronics Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 4Copyright  2000 WWW. Microsemi .COM RangeMAX  LXM1622-12-xx D UAL 5W, DIGITAL D IMMING CCFL INVERTER M ODULE P RELIMINARY D ATA S HEET A MICROSEMI COMPANY /G13/G09/G16 /G08/G13/G02 /G05/G0F/G0A/G14/G02/G17/G0F/G1A /G16/G09/G05/G13/G09/G16 /G08/G13/G02 /G05/G0F/G0A/G14/G02/G17/G0F/G1A /G16/G09/G05 /G0C/G03/G0C/G03 LAMP VOLTAGE & LAMP CURRENT – BURST MODE OPERATION /G0E/G1E/G1F/G20/G21/G22 /G1C – 50% Burst Duty Cycle /G0E/G1E/G1F/G20/G21/G22 /G23 – 5% Burst Duty Cycle Rather than using the traditional dimming technique of varying lamp current magnitude to adjust light output, RangeMAX inverters use a fixed lamp current value with a duty cycle control method. The lamp current burst width can be modulated from 100% (continuous lamp current) down to a 5% duty cycle, allowing the lamp to be dimmed to less than 3% of its full brightness. As can be seen in Trace 4 of Figure 3 photo at right, careful design consideration was given to controlling lamp start voltage to softly start current flow. This eliminates current overshoot that can result in premature cathode wear and reduce lamp life. /G0E/G1E/G1F/G20/G21/G22 /G24 – 5% Burst Duty Cycle (Expanded Time Base) Ramp Gen. Transformer Driver High Voltage Transformer Comparator Ramp + ISENSE V SENSE V BRITE 0.25 - 2.2V DC V SYNC LAMP V LO V HILAMP V LO V HI Figure 4 – RangeMAX Simplified Block Diagram HIGHLIGHTS

• Integrated brightness control circuit includes a DC voltage to pulse width converter that minimizes system design work and system noise susceptibility. This provides a familiar and convenient interface while reducing the potential for externally induced noise, which can cause lamp flicker.
• RangeMAX inverter modules are designed to operate with the burst frequency synchronized to the video frame rate. This provides operation with no visible display disturbances caused by beat frequencies between the lamps and video frame rates. In this synchronous mode, the inverter burst rate operates at twice the video refresh rate, well beyond standard 50/60Hz video refresh rates where the eye can perceive pulsing light. DDEESSCCRRIIPPTTIIOONN

Linfinity Microelectronics Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 6Copyright  2000 WWW. Microsemi .COM RangeMAX  LXM1622-12-xx D UAL 5W, DIGITAL D IMMING CCFL INVERTER M ODULE P RELIMINARY D ATA S HEET A MICROSEMI COMPANY /G11/G17/G1A/G1C/G27/G23/G23/G11/G17/G1A/G1C/G27/G23/G23 /G28/G28 /G1C/G23/G1C/G23 /G28/G28 /G1A/G1A /G09/G10/G08/G07/G10/G08/G1A/G1A /G09/G10/G08/G07/G10/G08 /G04/G10/G05/G05/G02/G0A/G08 /G0F/G01/G29/G10/G03/G08/G04/G10/G05/G05/G02/G0A/G08 /G0F/G01/G29/G10/G03/G08 The LMX1622-12-01 output current can be adjusted lower by changing the value of one resistor (R18) on the PCB. The following table shows the new output current values: Add R18 Output Current Resistor Value 6.5mArms Not used 6.0mArms 1.0M 5% 5.5mArms 422K 1% 5.0mArms 267K 1% 4.5mArms 178K 1% 4.0mArms 121K 1% 3.5mArms 88.7K 1% 3.0mArms 68.1K 1% The LMX1622-12-02,03 output current can be adjusted lower by changing the value of one resistor (R18) on the PCB. Changing the value of R35 can also increase the output current. The following table shows the new output current values: Add R18 Output Current Resistor Value 5.5mArms Not used 5.0mArms 845K 1%, 4.5mArms 374K 1%, 4.0mArms 232K 1% 3.5mArms 127K 1%, 3.0mArms 71.5K 1% Change R35 Output Current Resistor Value 5.5mArms 576 1% (stock value) 6.0mArms 499 1% 6.5mArms 442 1% /G01/G05/G06/G19/G06/G0A/G14 /G08/G13/G02 /G12/G05/G06/G08/G02 /G06/G0A/G01/G05/G06/G19/G06/G0A/G14 /G08/G13/G02 /G12/G05/G06/G08/G02 /G06/G0A /G07/G10/G08 /G0E/G05/G09/G17 /G0F /G13/G06/G14/G13 /G06/G17/G07/G02/G07/G10/G08 /G0E/G05/G09/G17 /G0F /G13/G06/G14/G13 /G06/G17/G07/G02 /G0F/G01/G0F/G0A/G04/G02/G0F/G01/G0F/G0A/G04/G02 The LMX1622-12-xx comes with a built in 5K pull-up resistor to allow the use of an external potentiometer for brightness adjust. In some cases this pull-up resistor may interfere with those driving the BRITE input from a high impedance. In this case the internal pull- up resistor R44 may be removed from the board. Please use the drawing below to help locate the specified resistor. /G04/G09/G17/G07/G09/G0A/G02/G0A/G08 /G01/G05/G0F/G16/G06/G0A/G14/G04/G09/G17/G07/G09/G0A/G02/G0A/G08 /G01/G05/G0F/G16/G06/G0A/G14 R45 R46 R50 C17 R33 R54 C30 R30 C20R36 R37 R35 C24 U5 R47 R48 R53 R52 R44 R49 C10 R17 C9 RJ5 RJ6 R19 C11 R14 R16 R15 R51 D8 C5 R8 C4R7 RJ2 R13 RJ4 RJ1 RJ3 R12 R11 C6 R10 C12 C13 C14 C15 C16 R18 CN1 R23 R20 R22 Preliminary Data – Information contained in this document is pre-production data and is proprietary to LinFinity. It may not be modified in any way without the express written consent of LinFinity. Product referred to herein is offered in sample form only and LinFinity reserves the right to change or discontinue this proposed product at any time. AAPPPPLLIICCAATTIIOONNSS