MAX1739 Evaluation System/ Evaluation MAX1739 evaluation system s

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MAX1739 Evaluation System/ Evaluation MAX1739 evaluation system s

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19-2114; 7/01
MAX1739 Evaluation System/ Evaluation
MAX1739 evaluation system system) consists MAX1739 evaluation kit) companion Maxim SMBusinterface board. MAX1739 assembled tested board that demonstrates MAX1739 wide brightness range cold-cathode fluorescent lamp (CCFL) backlight controller. control brightness user-supplied lamp through either SMBus interface on-board potentiometer. Figure shows MAX1739 main display. Maxim SMBus interface board (MAXSMBUS) allows IBM-compatible parallel port emulate Intel system management (SMBus) 2-wire interface. Windows 95/98®-compatible software provides user-friendly interface exercise features MAX1739. program menu driven offers graphic interface with control buttons status display. Order MAX1739EVSYS complete PC-based evaluation MAX1739. Order MAX1739EVKIT already have SMBus interface. Wide Brightness Adjustment Range Open Lamp Protection with Timeout "Buck" Switch Other Single-Point Fault Protection Brightness Adjustable Through SMBus Interface On-Board Potentiometer Flicker Brightness High Power Light Efficiency I2CTM/SMBus Compatible Easy-to-Use Menu-Driven Software Assembled Tested Includes: Windows 95/98-Compatible Software (3.5in Floppy Disk) Demo Board
Features
Evaluates: MAX1739
Component Suppliers
SUPPLIER Fairchild General Semiconductor Motorola Murata Nihon Panasonic Sumida Taiyo Yuden Toshiba Diodes Inc. WIMA PHONE 408-822-2000 631-847-3000 303-675-2140 814-237-1431 805-867-2555 201-392-7522 847-956-0666 408-573-4150 949-455-2000 805-446-4800 914-347-2474 408-822-2102 MAX1739EVKIT 631-847-3236 303-675-2150 814-238-0490 805-867-2698 201-392-4441 847-956-0702 408-573-4159 949-859-3963 805-446-4850 914-347-7230 MAX1739EVSYS PART
Ordering Information
SMBUS INTERFACE TYPE included MAXSMBus PACKAGE QSOP QSOP
Note: MAX1739 software provided with MAX1739EVKIT. However, software, MAXSMBUS board required interface computer.
MAX1739EVSYS Component List
PART MAX1739EVKIT MAXSMBUS DESCRIPTION MAX1739 SMBus interface board
Note: Please indicate using MAX1739 when con-
tacting these component suppliers.
SMBus trademark Intel Corp. Windows registered trademark Microsoft Corp. trademark Philips Corp.
Maxim Integrated Products
pricing, delivery, ordering information, please contact Maxim/Dallas Direct! 1-888-629-4642, visit Maxim's website www.maxim-ic.com.
MAX1739 Evaluation System/ Evaluation Evaluates: MAX1739
MAX1739EVKIT Component List
DESIGNATION DESCRIPTION 0.1µF, ceramic capacitors Taiyo Yuden EMK107BJ104KA Murata GRM39X7R104K016 3300pF, ceramic capacitor 0.47µF, ceramic capacitor Taiyo Yuden EMK212BJ474KG Murata GRM40X7R474K016 22pF, 3.1kV ceramic high-voltage capacitor Murata GHM1038-SL-220J-3K 0.1µF, 50V, low-dissipation Panasonic ECHU1H104JC9 Panasonic ECHU1H104JB9 Cornell Dubilier FCP1913H104J-E2 Panasonic ECWU1H104JC9 WIMA SMD1812 100pF ceramic capacitor 4.7µF, ceramic capacitor Taiyo Yuden TMK325BJ475MN 30V, Schottky diode Toshiba CRS02 Nihon EP10QY03 100mA Schottky diode Fairchild BAT54 General Semiconductor BAT54 Diodes Inc. BAT54 100mA dual-series diode Fairchild Semiconductor MMBD4148SE General Semiconductor MMBD7000 Diodes Inc. MMBD7000 4-pin headers 3-pin headers 2-pin header 47µH, 1.1A inductor Sumida CD104-470 right angle female receptacle None None DESIGNATION DESCRIPTION N-channel MOSFET (30V, 0.10) Fairchild FDN361AN Dual N-channel MOSFET (30V, 0.095) Fairchild FDC6561AN Toshiba TPC6201 49.9k resistors resistors 150k resistor 12.1k resistor installed multiturn potentiometer resistor resistor 8.7µH, transformer (180:1) Sumida 5371-T001 (CIUH8D42 Style) MAX1739EUP MAX1739 data sheet MAX1739 data sheet
JU1, JU2, JU4,
Figure Main Display MAX1739
MAX1739 Evaluation System/ Evaluation Evaluates: MAX1739
49.9k 49.9k 0.1µF SMBSUS 3300pF CRF/SDA 0.47µF CRF/SDA SMBCLK 100pF CTFB SYNC 150k 12.1k MODE MODE (SHORTED TRACE) CTL/SCL 0.1µF SH/SUS 0.1µF MINDAC BATT 4.7µF
MAX1739
47µH
HIGH VOLTAGE
0.1µF
22pF
SH/SUS
SMBDATA CTL/SCL
CSAV
J1-1 J1-3 J1-5 J1-7 J1-9 J1-11 J1-13 J1-15 J1-17 J1-19
N.C. SMBDATA
J1-2 J1-4 J1-6 SMBCLK SMBSUS J1-8 J1-10 J1-12 J1-14 J1-16 J1-18 N.C. J1-20
N.C. N.C. N.C. N.C.
Figure MAX1739 Schematic Diagram
MAX1739 Evaluation System/ Evaluation Evaluates: MAX1739
Quick Start
Required Equipment
Before begin, will need following equipment: PC-compatible computer running Windows 95/98 parallel printer port (25-pin socket back computer) standard 25-pin, straight-through, male-to-female cable connect computer's parallel port Maxim SMBus interface board power supply capable supplying voltage between +20V 100mA power SMBus board power supply capable supplying +12V 500mA power MAX1739 board CCFL with following specifications: Strike Voltage 1.6kV Lamp Current Input Power MAX1739.EXE software program from floppy hard drive. Windows program manager program. desired, INSTALL.EXE program copy files create icons them Windows 95/98 Start menu. uninstall program included with software. Click UNINSTALL icon remove software from hard drive. Connect +7VDC +20VDC power supply pads labeled POS9 GND1 SMBus interface board. Connect +12V supply pads labeled GND. Turn both power supplies. Start MAX1739 program opening icon Start menu. Observe program automatically detects address MAX1739 starts main program.
Detailed Description Software
User-Interface Panel Procedure
user interface easy operate. mouse press navigate with arrow keys. Each buttons corresponds bits command configuration bytes. Clicking them generates correct SMBus write operation update internal registers. brightness lamp adjusted either moving trackbar entering value between into edit field located below trackbar. After typing value update internal register, press Enter. SHMD register configures operation device described Table When Automatic Read feature enabled, program polls MAX1739 times second. brightness, mode, status read appropriate fields updated main display. Disable this feature unchecking checkbox click appropriate button update each field individually. Brightness Cycle feature cycles brightness through entire range. Status register indicates whether lamp circuit opened (Status1 low) overcurrent condition occurred (Status0 low). Reset button sets MAX1739 software state. doubt, click Reset button.
WARNING! High Voltages present this evaluation kit. caution when making connections applying power. Carefully connect boards aligning 20-pin connector MAX1739 with 20-pin header MAXSMBUS interface board. Gently press them together. boards should flush against each other. turn power until connections completed. Connect lamp high-voltage pads. jumpers following positions: Open
Connect cable from computer's parallel port SMBus interface board. straightthrough, 25-pin, female-to-male cable. avoid damaging your computer, 25-pin SCSI port other connector that physically similar 25-pin parallel printer port.
MAX1739 Evaluation System/ Evaluation
Table SH/SUS SHMD Register Truth Table
/SUS SHMD2 SHMD1 SHMD0 OPERATING MODE Operate Shutdown Status1 Operate Shutdown Status1 Shutdown Status1
Evaluates: MAX1739
Simple SMBus Commands
There methods communicating with MAX1739: through normal user-interface panel through SMBus commands available from pressing MAXSMBUS button. display pops that allows SMBus protocols, such Read Byte Write Byte, executed. stop normal user-interface execution that does override manually values, turn timer unchecking Automatic Read checkbox. SMBus dialog boxes accept numeric data binary, decimal, hexadecimal. Hexadecimal numbers should prefixed Binary numbers must exactly eight digits.
Jumper
Jumper sets voltage MINDAC pin. This voltage sets digital-to-analog converter's (DAC's) minimum scale output voltage. position, MINDAC connected this position, lamp completely minimum scale. Additionally, DPWM chopping function disabled (refer MAX1739 data sheet). position, MINDAC connected through voltage-divider formed voltage MINDAC approximately position, MINDAC connected directly REF. voltage MINDAC
Detailed Description Hardware
Jumper
Jumper sets MAX1739 either mode SMBus mode. There possible settings mode: negative scale positive scale. negative scale mode, 1-2, brightness lamp decreases voltage CTL/SCL increases. positive scale mode, 1-3, brightness lamp increases voltage CTL/SCL increases. SMBus mode, 1-4, SMBus interface enabled MAX1739. Refer MAX1739/MAX1839 data sheet more information.
Jumper
Jumper JU4, position, enables MAX1739 unless SMBus suspend line (SH/SUS) pulls low. position, MAX1739 placed into shutdown mode.
Jumper
jumper must left open SMBus operation prevent loading SMBus data signal. mode, shunt must installed. This connects potentiometer reference input voltage (CRF/SDA).
Jumper
Jumper connects CRF/SDA either directly (position 1-2) through resistor (position 2-3). This pullup resistor SMBus data signal. mode, CRF/SDA sets reference input voltage analog-to-digital converter (ADC). Connecting this directly sets reference input voltage 5.3V. voltage other than 5.3V, leave open apply external voltage CRF/SDA pad.
Jumper
When using this mode, jumper must installed position. This connects wiper CTL/SCL pin. Adjusting changes voltage this pin, which changes brightness lamp. Jumper JU6, position, connects CTL/SCL through resistor. This position SMBus operation. resistor pullup resistor SMBus clock signal. Table lists jumper settings.
MAX1739 Evaluation System/ Evaluation Evaluates: MAX1739
Table Jumper Settings Description
JUMPER SHUNT LOCATION Open Open Closed FUNCTION MODE (negative-scale mode), CTL/SCL results maximum brightness. MODE (positive-scale mode), CTL/SCL results minimum brightness. MODE Enable SMBus interface. Used mode. Drive CRF/SDA with external voltage. external voltage reference input voltage ADC. (JU1 must position. closed.) Used mode. CRF/SDA reference input voltage ADC. (JU1 must position. closed.) Used SMBus mode: CRF/SDA connected through pullup resistor. MINDAC Disables DPWM chopping function. MINDAC MINDAC connected through voltage-divider formed This voltage sets DAC's minimum scale output voltage. MINDAC MINDAC connected REF. This voltage sets DAC's minimum scale output voltage. Used SMBus mode. SH/SUS connected through pullup resistor. Places MAX1739 into shutdown. Used SMBus mode. Drive CRF/SDA with SMBus data. Used mode. Drive CRF/SDA with analog voltage. (Connect position analog voltage.) Used mode. CTL/SCL connected reference input voltage (CRF/SDA) through potentiometer Adjusting changes brightness. Used SMBus mode. CTL/SCL connected through pullup resistor.
Transformer Suppliers Other Transformer Supplies
Coiltronics Toko 561-241-7876 847-803-6100 847-297-0070 561-241-9339 847-803-6296 847-699-7864
Table Jumper Settings Quick Reference
JUMPER SMBUS MODE Open MODE Closed
Lamp Current
resistor sets lamp current approximately 6mARMS (entering lamp). However, lamp current dependent lamp characteristics. Adjust needed achieve desired lamp current CCFL interest. Refer Sense Resistors section MAX1739 data sheet determining values.
uses small inductor. However, 200µH inductor with same saturation current rating improves input transient response circuit.
Inductor Tradeoffs
order achieve narrow form factor required many today's notebook CCFL solutions,
MAX1739 Evaluation System/ Evaluation Evaluates: MAX1739
1.0"
Figure MAX1739 Component Placement Guide-Component Side
1.0"
Figure MAX1739 Board Layout-Component Side
1.0"
Figure MAX1739 Board Layout-Solder Side
Maxim cannot assume responsibility circuitry other than circuitry entirely embodied Maxim product. circuit patent licenses implied. Maxim reserves right change circuitry specifications without notice time.
Maxim Integrated Products, Gabriel Drive, Sunnyvale, 94086 408-737-7600 2001 Maxim Integrated Products Printed registered trademark Maxim Integrated Products.

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