MAX8709EVKIT

19-3235; Rev 1; 4/04 MAX8709 Evaluation Kit/Evaluation System Features The MAX8709 evaluation system is an assembled and tested PC board that demonstrates the MAX8709 highefficiency, wide brightness range, CCFL backlight controller. Lamp brightness is adjustable through the SMBus™ interface. The system includes the Maxim command module (CMOD232) and a MAX8709 evaluation kit (EV kit). The CMOD232 board connects to a computer’s RS-232 serial port to provide a computer-controlled SMBus/I2C bus. Windows® 95/98/2000/XP-compatible software provides a user-friendly interface to exercise the features of the MAX8709. The program is menu driven and offers a graphics interface with control buttons and status display. ♦ +7V to +24V Input Range SMBus is a trademark of Intel Corp. ♦ Easy-to-Use Menu-Driven Software Windows is a registered trademark of Microsoft Corp. ♦ Wide Brightness Adjustment Range ♦ Open Lamp Protection with 1.2s Timeout ♦ Secondary Short-Circuit Protection ♦ Lamp Status Output ♦ Brightness Adjustable Through SMBus Interface ♦ Strike Voltage Up to 1.2kV ♦ High Power to Light Efficiency ♦ I2C/SMBus Compatible ♦ Assembled and Tested ♦ Includes Windows 95/98/2000/XP-Compatible Software and Demo PC Board Ordering Information MAX8709EVCMOD2 Component List PART QTY DESCRIPTION MAX8709EVKIT 1 MAX8709 evaluation kit CMOD232 1 Interface board AC Adapter 1 9VDC at 200mA (powers the CMOD232 board) TEMP RANGE SMBus INTERFACE TYPE MAX8709EVKIT 0°C to +70°C Not included MAX8709EVCMOD2 0°C to +70°C CMOD232 PART Note: The MAX8709 EV kit software is provided with the MAX8709EVKIT. However, to use the software, the CMOD232 board is required to interface the EV kit to the computer. MAX8709EVKIT Component List DESIGNATION QTY C1 C2, C4, C8, C9, C14 C3 DESCRIPTION 1 4.7µF ±20%, 25V X5R (1210) ceramic capacitor Murata GRM32RR61E475K Taiyo Yuden TMK325BJ475MN TDK C3225X7R1E475M 5 0.1µF ±10%, 10V X5R (0402) ceramic capacitors Murata GRP155R61A104K Taiyo Yuden LMK105BJ104KV TDK C1005X5R1A104K 1 0.47µF ±10%, 10V X5R (0603) ceramic capacitor Taiyo Yuden LMK107BJ474KA TDK C1608X5R1A474K DESIGNATION QTY DESCRIPTION 1 0.01µF ±10%, 50V X7R (0603) ceramic capacitor Murata GRM188R71H103K TDK C1608X7R1H103K C6, C7 2 0.1µF ±10%, 25V X7R (0603) ceramic capacitors Murata GRM188R71E104K Taiyo Yuden TMK107BJ104KA TDK C1608X7R1E104K C10 1 15pF ±10%, 3kV (1808) HV ceramic capacitor TDK C4520C0G3F150K C5 ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. 1 Evaluate: MAX8709 General Description MAX8709 Evaluation Kit/Evaluation System Evaluate: MAX8709 MAX8709EVKIT Component List (continued) DESIGNATION QTY C11 C12 C13 CN1 DESCRIPTION 1 0.022µF ±10%, 16V X7R (0402) ceramic capacitor Murata GRP155R71C223K Taiyo Yuden EMK105BJ223KV TDK C1005X7R1C223K 1 1µF ±10%, 25V X7R (1206) ceramic capacitor Murata GRM31MR71E105K Taiyo Yuden TMK316BJ105KL TDK C3216X7R1E105K DESCRIPTION J1 1 2 x 10 right-angle female receptacle N1A/B, N2A/B 2 Dual n-channel MOSFETs, 30V, 0.095, 6-pin SOT23 Fairchild Semiconductor FDC6561AN R1, R2, R3 3 100kΩ ±1% (0402) resistors R4 0 Not installed (0402) R5, R6, R7 3 10kΩ ±5% (0603) resistors R8 1 2kΩ ±5% (0402) resistor R9 1 150Ω ±1% (0402) resistor 0 Not installed (0603) R10 1 40.2Ω ±1% (0603) resistor R11 1 1MΩ ±5% (0402) resistor 1 Shrouded header for CCFL lamp connection, 3.5mm pin spacing, PC board mount JST SM02B-BHSS-1-TB R12 1 10kΩ ±5% (0402) resistor R13 1 510Ω ±5% (0402) resistor T1 1 CCFL transformer, 93:1 Sumida 5371-400-W1423 (CIUH8D42 style) TOKO T912MG-1018 (BLC103B style) U1 1 MAX8709ETI (28-lead thin QFN, 5mm x 5mm) U2 1 Dual inverter, SC70 Fairchild Semiconductor NC7WZ04P6X None 1 MAX8709 EV kit software CD 1 Dual silicon switching diode, common anode, SOT323 Central Semiconductor CMSD2836 Diodes Incorporated BAW56W D2 1 Silicon switching diode, SOD-323 Diodes Incorporated 1N4148WS F1 1 Fuse, 1A, 32V (1206) AVX F1206A1R00FWTR D1 DESIGNATION QTY Component Suppliers PHONE FAX AVX SUPPLIER 843-946-0238 843-626-3123 www.avxcorp.com WEBSITE Central Semiconductor 631-435-1110 631-435-1824 www.centralsemi.com Diodes Incorporated 805-446-4800 805-446-4850 www.diodes.com Fairchild Semiconductor 888-522-5372 — JST 847-473-1957 847-473-0144 www.jst.com Murata 770-436-1300 770-436-3030 www.murata.com Sumida 847-545-6700 847-545-6720 www.sumida.com Taiyo Yuden 800-348-2496 847-925-0899 www.t-yuden.com TDK 847-803-6100 847-390-4405 www.component.tdk.com TOKO 847-297-0070 847-699-1194 www.tokoam.com www.fairchildsemi.com Note: Please indicate you are using the MAX8709 when contacting these manufacturers. 2 _______________________________________________________________________________________ MAX8709 Evaluation Kit/Evaluation System Recommended Equipment Before you begin, the following equipment is needed: • A computer running Windows 95, 98, 2000, or XP • An RS-232 serial port (this is a 9-pin socket on the back of the computer) • A standard 9-pin, straight-through, male-to-female cable to connect the computer’s serial port to the Maxim CMOD232 board • A DC power supply capable of supplying a voltage between +7V to +24V at 1A to power the MAX8709 board • A CCFL lamp with the following specifications: Maximum strike voltage ≤ 1.2kV Lamp current ≤ 6mA Input power ≤ 4W WARNING! High voltages are present on this evaluation kit. Use caution when making connections and applying power. Do not turn on the power until all connections are made. Procedure 1) Carefully connect the boards by aligning the 20-pin connector of the MAX8709 EV kit with the 20-pin header of the CMOD232 board. Gently press them together. The two boards should be flush against each other. 2) Disable the pullup resistors on the CMOD232 board by moving switch SW1 (located on the CMOD232 board) to the OFF position. 8) Turn on the power supply. 9) Start the MAX8709 program by opening its icon in the Start menu. 10) Observe as the program automatically detects the address of the MAX8709 and starts the main program. Detailed Description of Software User-Interface Panel The user interface is easy to operate using the mouse, or by using the tab key to navigate with the arrow keys. Each of the buttons corresponds to bits in the command and configuration bytes. Clicking on them generates the correct SMBus write operation to update the internal registers. The brightness of the lamp can be adjusted by either moving the trackbar or by entering a value between 0 and 31 into the edit field located below the trackbar. Pressing enter after typing in the new value updates the internal register. The SHMD register configures the operation of the device as described in Table 1. When the automatic read feature is enabled, the program polls the MAX8709 once a second. The brightness, mode, and status are read and the appropriate fields are updated on the main display. Unchecking the checkbox disables this feature and each field can be updated individually by clicking the appropriate button. The status register indicates whether the lamp circuit has opened (Status1 low) or an overcurrent condition has occurred (Status0 low). The RESET button sets the MAX8709 and software to the POR state. If in doubt, click the reset button. 3) Connect the lamp to connector CN1. 4) Connect a cable from the computer’s serial port to the CMOD232 board. Use a straight-through 9-pin female-to-male cable. 5) Insert the MAX8709 EV kit software CD and install the software by running the INSTALL.EXE program. The install program copies the files and creates icons for them in the Windows 95/98/2000/XP Start menu. (To remove the software at any time, click on the UNINSTALL icon.) Table 1. SUS and SHMD Register Truth Table SUS SHMD2 SHMD1 SHMD0 OPERATING MODE 0 0 X 0 Operate 0 0 X 1 Shutdown, STATUS1 set 1 0 0 X Operate 6) Connect the 9V plug-in transformer to the CMOD232 board. 1 0 1 X Shutdown, STATUS1 set 7) Connect the +7V to +24V supply to the pads labeled VIN and GND on the MAX8709 EV kit. X 1 X X Shutdown, STATUS1 set _______________________________________________________________________________________ 3 Evaluate: MAX8709 Quick Start Evaluate: MAX8709 MAX8709 Evaluation Kit/Evaluation System Simple SMBus Commands There are two methods for communicating with the MAX8709: through the normal user-interface panel, or through the SMBus commands available from pressing the interface button. A display pops up that allows the SMBus protocols, such as read byte and write byte, to be executed. To stop normal user-interface execution so it does not override the manually set values, turn off the timer by unchecking the automatic read checkbox. The SMBus dialog boxes accept numeric data in binary, decimal, or hexadecimal. Hexadecimal numbers should be prefixed by $ or 0x. Binary numbers must be exactly eight digits. Note: In places where the slave address asks for an 8bit value, it must be the 7-bit slave address of the MAX8709 with the last bit set to 1 for a read operation and zero for a write. Figure 1. Main Window for the MAX8709 EV Kit Software 4 _______________________________________________________________________________________ MAX8709 Evaluation Kit/Evaluation System Evaluate: MAX8709 VCC R12 10kΩ D2 U2-B 3 LAMP_LV C14 0.1µF 4 5 U2-A 6 1 LAMP_STAT 2 R11 1MΩ VBATT F1 1A VIN C7 0.1µF GND REF C5 0.01µF R1 100kΩ 1% 28 1 R2 100kΩ 1% VFB IFB VCC C3 0.47µF 27 BATT VCC ILIM C6 0.1µF 26 CCV 25 CCI 23 24 IFB 22 VFB N.C. GH2 LX2 21 20 REF 2 REF C2 0.1µF R3 100kΩ 1% BST2 REF 19 LX2 C9 0.1µF D1 1 L 3 VCC U1 3 R4 OPEN 4 2 R LOT BST1 MAX8709 GND VCC R5 10kΩ LX1 ISEC 5 6 SDA SMBDATA 7 18 17 VBATT C8 0.1µF 4 LX1 ISEC GH1 3 R6 VCC R7 10kΩ 10kΩ 6 N2-A 2 5 4 6 1 LX1 SDA SCL N2-B 16 C1 4.7µF GL1 SUS N.C. 8 9 N.C. 10 N.C. 11 VDD 12 PGND 13 GL2 15 LX2 N1-B 3 N1-A 2 5 1 14 VCC C4 0.1µF SMBCLK SMBSUS SCL SUS Figure 2. MAX8709 EV Kit Schematic _______________________________________________________________________________________ 5 Evaluate: MAX8709 MAX8709 Evaluation Kit/Evaluation System C12 1µF LX1 LX2 4 T1 CN1 6 1 LAMP_LV 2 VFB (PIN 22) ISEC (PIN 5) R10 40.2Ω 1% 2 C10 15pF 10 R8 2kΩ C13 OPEN J1-1 IFB (PIN 24) C11 0.022µF N.C. J1-3 HV LV R13 510Ω R9 150Ω 1% J1-2 J1-4 SMBDATA J1-6 J1-5 J1-7 SMBCLK J1-8 J1-9 SMBSUS J1-10 J1-11 N.C. J1-12 J1-13 N.C. J1-14 J1-15 N.C. J1-16 J1-17 N.C. J1-18 J1-19 N.C. J1-20 Figure 3. MAX8709 EV Kit Schematic—SMBus and High-Voltage Section 6 _______________________________________________________________________________________ MAX8709 Evaluation Kit/Evaluation System Evaluate: MAX8709 Figure 4. MAX8709 EV Kit Component Placement Guide—Component Side Figure 5. MAX8709 EV Kit PC Board Layout—Component Side Figure 6. MAX8709 EV Kit PC Board Layout—Solder Side Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 _____________________ 7 © 2004 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.