MAX31790 Evaluation Kit General Description The MAX31790 evaluation kit (EV kit) provides the hardware and software graphical user interface (GUI) necessary to evaluate the MAX31790 6-channel PWM-output fan RPM controller. The EV kit includes a MAX31790ATI+ installed, as well as a USB-to-I2C interface. The USB-to-I2C master section on the EV kit labeled "MAXIM DS3900U HID" can be used to interact with the EV kit software and exercise the device's functionality. The EV kit provides headers and test points to connect user-supplied fans, but does not come with a fan included. EV Kit Contents Assembled circuit board including the MAX31790ATI+ and USB-to-I2C circuitry Mini-USB cable EV Kit Photo Windows, Windows XP, and Windows Vista are registered trademarks and registered service marks of Microsoft Corporation. 19-6552; Rev 0; 12/12 Evaluates: MAX31790 Features Easy Evaluation of the MAX31790 USB HID interface Windows XP(R)-, Windows Vista(R)-, and Windows(R) 7-Compatible Software RoHS Compliant Proven PCB Layout Fully Assembled and Tested Ordering Information appears at end of data sheet. MAX31790 Evaluation Kit Evaluates: MAX31790 Component List DESIGNATION QTY B1 1 Green banana jack Deltron 571-0500 B2 1 Black banana jack Deltron 571-0100 1 Yellow banana jack Deltron 571-0700 1 0.1F 10%,100V X7R ceramic capacitor (0805) TDK CGA4J2X7R2A104K 5 0.1F 10%, 25V X7R ceramic capacitors (0603) TDK C1608X7R1E104K 2 4.7F 10%, 6.3V X5R ceramic capacitors (0603) TDK C1608X5R0J475K B3 C1 C1I, C6I, C7I, C11I, C13I C2I, C5I DESCRIPTION C3 1 4.7F 10%, 50V X5R ceramic capacitor (0805) TDK CGA4J3X5R1H475K C3I, C9I, C10I, C12I 4 1.0F 10%, 16V X7R ceramic capacitors (0603) Murata GRM188R71C105K DESIGNATION QTY DESCRIPTION J1, J101, J201, J301, J401, J501, J601 7 2-pin headers, 2.54mm pitch 3M 961102-6404-AR J1I 1 USB_ 5-pin female header Molex 54819-0519 J2-J4, J7, J8 5 3-pin headers, 2.54mm pitch 3M 961103-6404-AR J2I, J3I 2 Solder bridges J5, J6 2 8-pin (2 x 4) headers, 2.54mm pitch 3M 961208-6404-AR J11 1 5-pin BNC TE connector AMP 5227161-1 J100, J200, J300, J400, J500, J600, J700, J800, J900, J1000, J1100, J1200 12 4-pin headers, 2.54mm pitch 3M 961104-6404-AR Q1I 1 nMOS (SOT323) ON Semi NTS4001NT1G R1-R4, R101, R103, R201, R203, R301, R303, R401, R403, R501, R503, R601, R603 16 4.7k 1% resistors (0805) Vishay CRCW08054K70FKEA R1I, R7I, R8I 3 330 1% resistors (0603) Vishay CRCW0603330RFKEA R2I, R3I 2 24.9 1% resistors (0603) Vishay CRCW060324R9FKEA C4 1 6.8F 20%, 50V tantalum capacitor (2812) Vishay 595D685X0050C2T C4I, C8I 2 0.01F 10%, 50V ceramic capacitors (0603) Murata GRM188R71H103K C8, C9 2 12pF 05%, 100V ceramic capacitors (0805) AVX 08051A120JAT2A C14I 1 220nF 10%, 10V X7R ceramic capacitor (0603) TDK C1608X7R1A224K D1I 1 Red LED (1206) Knightbright APTR3216EC R4I 1 100k 1% resistor (0603) Vishay CRCW0603100KFKEA D2I 1 Dual LED (0805) Kingbright APHBM2012SURKCGKC R5, R6 2 1.21k 1% resistors (0805) Vishay CRCW08051K20FKEA D3I 1 Schottky diode (MINI2-F1) Panasonic-SSG DB2W31900L R5I, R6I 2 10k 1% resistors (0603) Vishay CRCW060310K0FKEA D7, D8 2 Red LEDs (1206) Knightbright APTR3216EC www.maximintegrated.com Maxim Integrated 2 MAX31790 Evaluation Kit Evaluates: MAX31790 Component List (continued) DESIGNATION QTY DESCRIPTION DESIGNATION QTY DESCRIPTION U1 1 Fan controller (28 TQFN-EP*) Maxim MAX31790ATI+ U1I 1 Current-limit switch (5 SOT70) Maxim MAX4787EXK+ R7-R10, R100, R200, R300, R400, R500, R600 10 R9I 1 2.2k 1% resistor (0603) Vishay CRCW06032K20FKEA U2I 1 Linear regulator (5 SOT23) Maxim MAX8868EUK33+ R10I 1 4.7k 1% resistor (0603) Vishay CRCW06034K70FKEA U3I 1 USB transceiver (16 TSSOP) Maxim MAX3344EEUE+ R11 1 100 10% resistor (0805) Vishay CRCW0805100RFKEA U4I 1 FXMA108 Fairchild FXMA108BQX TP1-TP5, TP22-TP28, TP40-TP57 30 White test points Keystone 5012 U5I 1 PIC Microchip PIC18LF2550-I/SO TP6-TP8, TP30-TP35 1 9 Black test points Keystone 5011 X1 12pF crystal Epson C-002SH 32.7680KA-A X1I 1 1 Red test point Keystone 5010 4-pin CMOS oscillator AVX KC3225A48.0000C30E00 1 Yellow test point Keystone 5014 -- 1 PCB: MAX31790 6 FAN CONTROLLER, 12 FAN MONITOR TP29 TP37 0 1% resistors (0805) Vishay CRCW0805000RFKEA *EP = Exposed pad. MAX31790 EV Kit Files Setup Procedure FILE DESCRIPTION MAX31790EVKitSoftware.EXE Application program Note: The .EXE file is downloaded as a .ZIP file. Quick Start Required Equipment MAX31790 EV kit User-supplied Windows XP, Windows Vista, or Windows 7 PC with USB port Mini-USB cable (included) EV kit hardware (included) User-supplied 3.3V power supply (300mA minimum) User-supplied 12V VFAN power supply User-supplied DC fan Note: In the following sections, software-related items are identified by bolding. Text in bold refers to items directly from the EV kit software. Text in bold and underlined refers to items from the Windows operating system. www.maximintegrated.com The EV kit is fully assembled and tested. Follow the steps below to verify board operation: 1) Place the EV kit hardware on a nonconductive surface to ensure that nothing on the PCB gets shorted to the workspace. 2) Ensure that jumper/shunt J1 is installed, which provides power to the device. 3) Check the following startup configuration jumpers/ shunts, which result in the associated behavior: a. J8 (PWM_START1) = GND and J7 (PWM_ START0) = VCC. Defines a power-on-reset (POR) PWM duty cycle of 75%. b. J2 (FREQ_START) = VCC. Defines a POR PWM frequency of 25kHz. c. J3 (SPIN_START) = VCC. Defines the POR spinup behavior for 100% duty cycle until two tachometer pulses or 1s (MAX). d. J4 (WATCHDOG_START) = GND. Defines a disabled I2C watchdog on POR. e. J5 (ADD0) = GND and J6 (ADD1) = GND. Defines a POR slave address of 40h. Maxim Integrated 3 MAX31790 Evaluation Kit 4) Ensure that jumpers/shunts J101, J201, J301, J401, J501, and J601 are installed, which connects the associated PWMOUT signal to the Fan1-Fan6 headers. 5) Connect a 3.3V power supply to the VCC and GND banana jacks. 6) Connect a 12V power supply to the VFAN and GND banana jacks. 7) Prior to starting the GUI, connect the EV kit hardware to a PC using the supplied mini-USB cable, or equivalent. The COM LED (D2l) should be red and slowly flash orange. 8) Windows should automatically begin installing the necessary device driver. The USB interface of the EV kit hardware is configured as an HID device and therefore does not require a unique/custom device driver. Once the driver installation is complete, a Windows message appears near the System Icon menu indicating that the hardware is ready to use. Do not attempt to run the GUI prior to this message. If you do, then you must close the application and restart it once the driver installation is complete. On some versions of Windows, administrator privileges may be required to install the USB device. 9) Once the device driver installation is complete, visit www.maximintegrated.com/evkitsoftware to download the latest version of the EV kit software, MAX31790EVKitSoftware.zip. Save the EV kit software to a temporary folder. 10) Open the .ZIP file and extract the .EXE file to your desired location. The .EXE file is the actual EV kit GUI and not an install program. You can store the .EXE wherever you like and then uninstall it later by simply deleting the .EXE file. 11) Double-click on the .EXE file to run the GUI. A message box stating The publisher could not be verified. Are you sure you want to run this software? may appear. If so, click Run. www.maximintegrated.com Evaluates: MAX31790 12) When the GUI appears, proper communication to the USB-to-I2C master is indicated in the lower right corner below the Status box by a text string stating DS3900 Connected. The COM LED (D2l) now turns off and flashes red when communication occurs. 13) To verify communication to the device, with the default jumper/shunt settings described in steps 2-4, press the UpdateDashBoard button on the top right corner and verify the PWM Frequency updates to 25kHz and all Duty Cycle values update to 75.15%, as shown in Figure 1. This completes the EV kit setup. The hardware and software are ready to begin evaluating the device. If any issues arise, see the Troubleshooting section. Detailed Description of Software GUI Status Box On the bottom right side of the GUI is the Status group box. It is used to relay information to the user and is cleared with the associated Clear Button. The text box below the Status label indicates the status of the communication between the GUI and the EV kit hardware. If everything is working properly, a message indicates DS3900 Connected; otherwise, the display shows a yield sign and DS3900 Disconnected!! Device Configuration Upon successful completion of the setup procedure, the user is ready to begin evaluation of the device. The device's POR behavior is set by the power-up configuration pins and the default POR values, as defined in the MAX31790 IC data sheet. The USB-to-I2C master communicates to the Slave ID (hex) shown in the DashBoard in the upper right side of the GUI. To change the target slave address, enter the new value into the input field and press the Set button. Maxim Integrated 4 MAX31790 Evaluation Kit Evaluates: MAX31790 Figure 1. MAX31790 EV Kit GUI (Main Tab) www.maximintegrated.com Maxim Integrated 5 MAX31790 Evaluation Kit Evaluates: MAX31790 Figure 2. MAX31790 EV Kit GUI (FanChannel1 Tab) www.maximintegrated.com Maxim Integrated 6 MAX31790 Evaluation Kit Evaluates: MAX31790 Figure 3. MAX31790 EV Kit GUI (Fan Faults Tab) www.maximintegrated.com Maxim Integrated 7 MAX31790 Evaluation Kit Reads Each register of the device can be read from the GUI by the simple press of the associated Read button. The registers are located in one of the tabs as defined below: Main Tab (Figure 1): Global Configuration register PWM Frequency register FanChannel1-6 Tabs (Figure 2): Fan n Configuration register (where n denotes the channel) Fan n Dynamics register Tach n Count register PWMOUT n Duty Cycle register PWMOUT n Target Duty Cycle register TACH n Target Duty Cycle register Window n Register Fan Faults Tab (Figure 3): Fan Fault Status 1 register Evaluates: MAX31790 Fan Fault Status 2 register Fan Fault Mask 1 register Fan Fault Mask 2 register Failed Fan Options/Sequential Start register Pressing a Read button performs a single read of the register(s) and updates the associated data fields. There is also an option to do continuous reads of the device. This AutoRead feature is located in the upper right section of the GUI. To start polling at a 1Hz frequency, press the Start AutoRead button. Each poll reads all registers shown in the dashboard and the active tab then updates the associated data fields. Once the continuous reads start, the button text changes to Stop AutoRead for the user to stop the reads. It is not recommended to change register parameters through a write while AutoRead is enabled. The GUI provides a very simple way to dump all the device registers to a text (.TXT) file. Under the Main Tab sheet, press the Register Dump button and provide a folder and file name. An example of a Register Dump is shown in Figure 4. Figure 4. MAX31790 Data Table www.maximintegrated.com Maxim Integrated 8 MAX31790 Evaluation Kit Writes Each register of the device can be written to/from the GUI either by the simple click on the radio button or the input of a decimal value followed by a press of the associated Write button. The writable registers are located in one of the tabs, as defined in the previous Reads section. Clicking on any radio button or drop-down list automatically writes the selected value to the device. To verify a successful write, perform a read that then updates the field. To write a register that requires a numerical value, such as TACH n Target Count or PWMOUT n Target Duty, enter the decimal value desired for the nonreserved data bits of the registers. For example, to write PWMOUT 1 Target Duty Cycle to a value of 39%, or 200 decimal (refer to the MAX31790 IC data sheet for bit weighting), click on the FanChannel1 tab and enter 200 in the input box located to the left of the PWMOUT 1 Target Duty Cycle(40-41h) label and press the Write (40-41h) button. This writes 64h to register 40h and 00h to register 41h. Verify the write by pressing the Read PWM Register button. The GUI provides a very simple way to load all the device registers from a text (.TXT) file. Under the Main Tab sheet, press the Register Load button and provide a previously saved Register Dump file or a modified version of a previous dump. The register load file must have the same format as the GUI-generated dump file. General I2C Tab The GUI provides a generic I2C tab (I2CMemory), which is not required to evaluate the device. Use this tab if a more flexible I2C transaction is required. FULL_SPEED Input Signal Control The GUI provides a method to control the FULL_SPEED input to the device. On the right side of the GUI in the DashBoard group box, there is a FULL_SPEED# section with two radio buttons that toggles the logic level of this signal between high and low. FAN_FAIL Output Signal Monitor Evaluates: MAX31790 Detailed Description of Hardware User-Supplied Fans The MAX31790 EV kit provides the flexibility to control the speeds of up to six fans or monitor up to 12 fans. The EV kit contains 12 fan headers (100 mil spacing) that fans connect to. Refer to the MAX31790 IC data sheet for various examples of fan configurations. Connect fans to the correct GND, VFAN, TACH, and PWM headers. In a closed-loop fan-control configuration on FAN1-FAN6, the jumper/shunt PWMn/FANn (J101, J201, J301, J401, J501, and J601) must be populated. This connects the PWM signal from the device to the fan header. To use PWM outputs as tachometer inputs, open-loop monitor configuration, on fan channel 1 for example, remove the jumper/shunt on PWM1/Fan1 (J101) and attach a fan to the Fan1/Fan7 headers. Connect the desired PWM signal for Fan1 to the PWM1 header and connect the desired PWM signal for Fan7 to the PWM7 test point. Properly configure the device through the I2C port to reflect the hardware configuration. User-Supplied I2C interface The USB-to-I2C master section of the EV kit is not necessary for the proper operation of the device. If the user wants to supply the I2C interface, the USB-toI2C master section of the EV kit can be disconnected by removing resistors R7 and R8. Connect test points SDA, SCL, and GND. The FULL_SPEED and FAN_FAIL signals from the device can also be routed to a different master by removing resistors R9 and R10 and connecting to the FULL_SPD, FAN_FAIL, and GND test points. Change Startup Configuration Jumpers All the startup configuration jumpers (J2-J8) are located on the left side of the PCB and partitioned off by silkscreen labeled STARTUP CONFIGURATION. Refer to the MAX31790 IC data sheet for resulting device operation. After changing jumper configurations, a device POR or a setting of the Reset bit in the Global Configuration register is required for new configurations to take effect. The GUI provides a method to monitor the FAN_FAIL output of the device. In the DashBoard group box, there is a FAN_FAIL# Pin section that changes to reflect the logic level of this signal. www.maximintegrated.com Maxim Integrated 9 MAX31790 Evaluation Kit Evaluates: MAX31790 Table 1. Hardware Configurations HARDWARE ACTION COMPONENTS DESCRIPTION Connect user-supplied Fan1-Fan6 J100, J200, J300, J400, J500, J600, Connect a user-supplied fan to the correct GND, VFAN, TACH, and PWM headers. Connect user-supplied Fan7-Fan12 J700, J800, J900, J1000, J1100, J1200 Connect a user-supplied fan to the correct GND, VFAN, TACH, and PWM headers. Connect FULL_SPEED and FAN_FAIL pins to user-supplied interface R9, R10 Remove resistors R9 and R10 and connect to the FULL_SPD and FAN_FAIL test points. Connect user-supplied I2C interface R7, R8 Remove resistors R7 and R8 and connect to user-supplied I2C interface to test points. Change startup configuration jumpers J2-J8 Adjust the jumper/shunt positions according to the silkscreen labels. Table 2. Description of LEDs LED COLOR D1l (FAULT) Red USB Power Fault: A fault occurred due to overvoltage limit, current limit, or thermal limit. Red Communication: After the software has initialized the hardware, the LED flashes red when a command from the PC is received. Off Initialized: Hardware has been initialized by software. D2l (COM) Red and Flashing Orange DESCRIPTION Waiting: Hardware is powered on and waiting for the software to be opened. D6 Red FULL_SPEED: LED connected to the active-low FULL_SPEED input. LED turns red when the FULL_SPEED signal is logic-low. D7 Red FAN_FAIL: LED connected to the active-low open-drain FAN_FAIL output. LED turns red when the FAN_FAIL signal is logic-low. www.maximintegrated.com Maxim Integrated 10 MAX31790 Evaluation Kit Evaluates: MAX31790 Troubleshooting All efforts were made to ensure that each EV kit works on the first try, right out-of-the-box. In the rare occasion that a problem is suspected, see Table 3 to help troubleshoot the issue. Table 3. Troubleshooting SYMPTOM GUI indicates: Hardware not found GUI Status indicates: Error communicating with the MAX31790 www.maximintegrated.com CHECK SOLUTION Is the LED labeled D1l red? If yes, then the electronic fuse is in a fault state. Inspect for electrical shorts on the PCB and make sure that the PCB is not sitting on a conductive surface. Does the LED labeled D2l turn off when the GUI is running? If not, then exit the GUI and try running it again. If D2l still does not turn off, then exit the GUI and power cycle the board by removing and reapplying the user-supplied power source. Try connecting the USB cable to a different USB port on the PC and wait for a Windows message that states that the hardware is ready to use. Run the GUI again. If D2l still does not turn off, unplug the USB cable and reboot the PC. Connect the USB cable and open the GUI. Are any of the LEDs illuminated? If not, then the PCB may not be getting power from the usersupplied power supply. Verify the power-supply bias with a voltmeter, measuring from VCC to GND. Valid levels are 3V to 5.5V. Slave address jumper configuration (J5, J6) Check the current setting of the slave address jumper configurations (J5, J6) and input the resulting slave address in the Slave ID (Hex) input box, then pressing the Set button. Maxim Integrated 11 GND GND VCC VCC J4 WD_START WD_STRT: GND = NO WATCHDOG VCC = 30s WD_START J3 SPIN_START FRQ_STRT: GND = 30Hz UNCONNECTED = 1.47 kHz VCC = 25kHz SPIN_STRT: GND = NO SPIN-UP UNCONNECTED = 0.5s MAX VCC = 1.0s MAX SPIN_START J2 FREQ_START FR Q_ST R T T P2 GND SPN_ST R T W D_ST R T T P1 3 2 1 VCC 1 3 5 7 2 4 SDA 6 SCL 8 GND HDR_8P IN J5 VCC GND HDR_8P IN 2 4 6 8 J8 PWM_START1 GND VCC PWM_START1 WM DUTY P CYCL E (%) GND UNCONNECTED 30 VCC 50 60 GND VCC 1 3 5 7 J6 TP 5 ADD1 J7 PWM_START0 VCC PWM_START0 GND VCC WM_STRT1 P GND SDA SCL VCC SL AVE ADDRESS SEL ECT P INS POR CONDI TI ON PWM_STRT0 GND GND GND UNCONNECTED UNCONNECTED VCC VCC TP 4 ADD0 A DD0 0 R9 0 R10 P7 P6 1 2 3 4 5 6 7 1 100 R11 J9B 28 PIN ROUND DB 28 PIN ROUND DB VDUT PWMOUT1 TACH1 PWMOUT2 TACH2 PWMOUT3 TACH3 J9D 28 PIN ROUND DB GND J9C 21 DNP (28 PIN ROUND D DB) 20 19 18 17 16 15 J9A CL K OUT J11 R5 1.21k TP 28 CL K OUT GND B1 0.1uF DNP 22 23 24 25 26 27 28 C1 C2 VCC SDA SCL FAN_F AI L # PWM_START0 PWM_START1 FUL L _SPEED# CL K OUT D8 FullSpeed R6 1.21k RedL EDs T his is the through hole footprint for Mtheplacem S ent on CP FREQ_START SPIN_START ADD1 ADD0 WD_START 0 R7 0 R8 SDA_P IC SCL _PIC R1 R2 R3 R4 4.7k 4.7k 4.7k 4.7k D7 FanFail VCC MAX31790 Circuitry 1 FREQ_START T P25 J1 1 VCC JUMP ER 2 TP 29 VCC VCC = 3.3V SDA SCL FAN_F AI L PWM_START0 PWM_START1 FUL L SPEED CL K OUT C8 12pF SL AVE ADDR= 40h - 5Eh GND PWMOUT4 TACH4 PWMOUT5 TAHC5 PWMOUT6 TACH6 GND C9 12pF TP 30 GND 1 VF AN 4.7uF 50VOLT 200 MIL TRACE VF AN TP 37 + C4 TP 32 GND GND GND GND GND GND TP 35 TP 33 TP 34 TP 31 TP 8 TP 7 GND TP 23 B3 1 GND TP 6 SCL SDA TP 22 TP 27 B2 FUL L _SPD# G ND EV K IT LAYOUT NOTE: Use recom mended PCB layout for cry stal traces 12pF 4.7uF 50VOLT GND C3 PWMOUT4 TACH4 PWMOUT5 TACH5 PWMOUT6 TACH6 GNDDUT X1 CRYSTAL 14 13 12 11 10 9 8 U1 MAX31790 TP 24 FAN_F AI L # ADDIT IO NAL TE ST POIN T S FA N_FA I L # SDA FU L L _SPE E D# SC L CONFIGURE POWER UP SAMPLED PIN PW M _ST R T 0 3 2 1 T P26 2 V DUT PW M OUT 1 T A C H1 PW M OUT 2 T A C H2 PW M OUT 3 T A C H3 21 20 19 18 17 16 15 V CC OU T 1 PW M OUT T A C H1 PW M OU OUTT 2 T A C H2 PW M OUT 3 T A C H3 FR E Q_ST A R T SPI N_ST A R T A DD1 A DD0 W D_ST A R T X TAL2 X TAL1 1 2 3 4 5 6 7 FR E Q_ST A R T SPI N_ST A R T A DD1 A DD0 W D_ST A R T 3 2 1 T P3 3 2 1 PW M _ST R T 1 3 2 1 C L K OU T FU L L _SPE E D# PW M _ST A R T 1 PW M _ST A R T 0 FA N_FA I L # SC L SDA 28 27 26 25 24 23 22 8 9 10 11 12 13 14 V FA N www.maximintegrated.com A DD1 G ND T A C H6 PW M OU T 6 T A C H5 PW M OU T 5 T A C H4 PW M OU T 4 MAX31790 Evaluation Kit Evaluates: MAX31790 Figure 5a. MAX31790 EV Kit Schematic (Sheet 1 of 4) Maxim Integrated 12 TP 40 VF AN C100 DNP GND GND TP 47 GND D3 D1 TACH3 R302 DNP TP 46 VF AN PWMOUT3 PWMOUT3 TACH3 GND TP 41 GND PWMOUT1 PWMOUT1 TACH1 TACH1 R102 DNP GND DNP (5.5V ZE NE R ) DNP (5.5V ZE NE R ) C300 DNP R101 4.7k J101 PWM1 GND J301 C301 DNP R301 4.7k VCC 200 MIL TRACE C101 DNP R303 4.7k VCC 0 R300 GND R103 4.7k VCC 0 R100 VCC 200 MIL TRACE PWM3 1 2 3 4 1 2 3 4 TP 48 PWM9 J300 VF AN 1 2 3 4 J900 D2 GND TP 44 GND TACH2 R202 DNP TP 43 VF AN PWMOUT2 PWMOUT2 TACH2 GND 1 2 3 4 J700 GND VF AN TACH9 PWM9 GND VF AN TACH7 PWM7 FAN3 HEADER TP 42 PWM7 J100 VF AN FAN1 HEADER FA N7 HE A DE R FA N9 HE A DE R 1 2 FAN 1 - 3 AND 7 - 9 HEADERS DNP (5.5V ZE NE R ) C200 DNP GND R203 4.7k VCC 0 R200 J201 C201 DNP R201 4.7k VCC 200 MIL TRACE PWM2 1 2 www.maximintegrated.com 1 2 1 2 3 4 TP 45 PWM8 J200 VF AN FAN2 HEADER GND VF AN TACH8 PWM8 1 2 3 4 J800 MAX31790 Evaluation Kit Evaluates: MAX31790 Figure 5b. MAX31790 EV Kit Schematic (Sheet 2 of 4) Maxim Integrated 13 FA N8 HE A DE R TP 49 VF AN TP 55 PWMOUT6 PWMOUT6 TP 56GND TACH6 TACH6 R602 DNP GND GND D6 C600 DNP C400 DNP D4 GND VF AN PWMOUT4 PWMOUT4 TP 50GND TACH4 TACH4 R402 DNP GND DNP (5.5V ZE NE R ) DNP (5.5V ZE NE R ) J401 R401 4.7k PWM4 GND J601 C601 DNP R601 4.7k VCC 200 MIL TRACE C401 DNP R603 4.7k VCC 0 R600 GND R403 4.7k VCC 0 R400 VCC 200 MIL TRACE PWM6 1 2 3 4 1 2 3 4 TP 57 PWM12 J600 VF AN FAN6 HEADER 1 2 3 4 J1000 TP 52 VF AN 1 2 3 4 J1200 PWMOUT5 PWMOUT5 TP 53GND TACH5 TACH5 R502 DNP GND GND VF AN TACH12 PWM12 GND VF AN TACH10 PWM10 TP 51 PWM10 J400 VF AN FAN4 HEADER FA N10 HE A DE R FA N12 HE A DE R 1 2 GND D5 C500 DNP FAN 4 - 6 AND 10 - 12 HEADERS DNP (5.5V ZE NE R ) GND R503 4.7k VCC 0 R500 J501 C501 DNP R501 4.7k VCC 200 MIL TRACE PWM5 1 2 www.maximintegrated.com 1 2 1 2 3 4 GND VF AN TACH11 PWM11 TP 54 PWM11 J500 VF AN FAN5 HEADER 1 2 3 4 J1100 MAX31790 Evaluation Kit Evaluates: MAX31790 Figure 5c. MAX31790 EV Kit Schematic (Sheet 3 of 4) Maxim Integrated 14 FA N11 HE A DE R GND J4I 2 1 GND 4.7k R10I VP I 3V3 VMI 3V3 VMO 3V3 OE 3V3 J2I VCC D2I A R7I 330 VCC COM VP P D3I C14I OE VDUT CL K VDUT GND 1 2 3 4 5 6 7 8 9 10 11 12 13 14 1.0uF 1.0uF PICfor DS3900 0.1uF C11I P8,1W_P U P7,1W_DQ P5 USB_DET VP O VMO P10,SCK ,SCL P11,SDI ,SDA VDD GND P9,SDO ENUM D+,VP D-,VM GND C9I C10I 5V 3.3V GND J1I VBUS 1 Vbus 2 R2I 24.9 DD3 R3I 24.9 D+ D+ 4 I.D. 5 GND USB_5P IN MCL R P3,HB COM_L ED,BOOT P1 P2 RCV P6, CS GND OSC1 OSC2 P4 UOE PS_VAR VUSB U5I ENUM 3V3 VTRM D+ D- USB_DET 3V3 R9I 2.2k 16 15 14 13 12 11 10 9 RCV VDUT P6 220nF J3I D2I B R8I 330 MAX3344E USB Transceiver. Converts USB signals to logical signals. The high lev el for the logical signals is 3.3V. RCV USB_DET VP O VL MODE VTRM VMO D+ OE DSUSP GND VP I VCC VMI ENUM U3I R ed 3.3V 1 2 3 4 5 6 7 8 G reen RCV 3V3 VP O 3V3 1 www.maximintegrated.com 2 28 27 26 25 24 23 22 21 20 19 18 17 16 15 C3I ENUM VDUT VP I VDUT VMI VDUT R1I FL AG GND OUT L ED D1I 3 2 1 OUT VCC 0.1uF GND C13I C12I VCC 48MHz Oscillator 3 4 3.3V 4.7uF C2I 5V OSC_CMOS_4pin GND INH 1.0uF GND 2 1 X1I 100mA current limiting switch. MAX4787 MAX4787EXK +TCT- ND IN ON U1I USB_DET VDUT VP O VDUT VMO VDUT SCL _PIC SDA_P IC P7 GND 1.0uF 5 4 330 C8I GND 0.1uF C1I GND 0.01uF USB-to-I2C Master BP OUT MAX8868EUK 33-T SHDN GND IN U2I FXMA108 VCCB B0 B1 B2 B3 B4 B5 B6 B7 OE 0.1uF C7I 20 19 18 17 16 15 14 13 12 11 ENUM VDUT VMI VDUT VP I VDUT OE VDUT VMO VDUT VP O VDUT RCV VDUT CL K VDUT VCC 4.7uF GND C5I C4I 3.3V 0.01uF GND VCCA A0 A1 A2 A3 A4 A5 A6 A7 GND U4I 0.1uF C6I 5 4 GND 8-Channel, Bi-Directional Level Translator. USB side has a fixed 3.3V reference. IPC side reference is the varying VDUT reference. 1 ENUM 3V3 2 VMI 3V3 3 VP I 3V3 4 OE 3V3 5 VMO 3V3 6 VP O 3V3 7 RCV 3V3 8 CL K 3V3 9 10 3.3V 3.3V L inear Regulator, 150mA max 1 2 3 R6I 10k USB_DET 3V3 GND R5I 10k GND Q1I NMOS R4I 100k VCC USB_DET VDUT MAX31790 Evaluation Kit Evaluates: MAX31790 Figure 5d. MAX31790 EV Kit Schematic (Sheet 4 of 4) Maxim Integrated 15 MAX31790 Evaluation Kit Evaluates: MAX31790 Figure 6. MAX31790 EV Kit PCB Layout--Top www.maximintegrated.com Maxim Integrated 16 MAX31790 Evaluation Kit Evaluates: MAX31790 Figure 7. MAX31790 EV Kit PCB Layout--Bottom www.maximintegrated.com Maxim Integrated 17 MAX31790 Evaluation Kit Evaluates: MAX31790 Ordering Information PART TYPE MAX31790EVKIT# EV Kit #Denotes an RoHS-compliant device that may include lead(Pb), which is exempt under the RoHS requirements. www.maximintegrated.com Maxim Integrated 18 MAX31790 Evaluation Kit Evaluates: MAX31790 Revision History REVISION NUMBER REVISION DATE 0 1/13 DESCRIPTION Initial release PAGES CHANGED -- For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated's website at www.maximintegrated.com. Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc. (c) 2012 Maxim Integrated Products, Inc. 19 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Maxim Integrated: MAX31790EVKIT#