19-5602; Rev 0; 10/10 MAX16927 Evaluation Kit The MAX16927 evaluation kit (EV kit) is a fully assembled and tested surface-mount circuit board that provides the voltages and features required for display systems in automotive applications. The EV kit contains a buck converter, boost converter, Cuk converter, positive gate-voltage linear regulator, negative gate-voltage linear-regulator controller, DAC-adjustable positive VCOM buffer, and DACadjustable negative VCOM buffer. The EV kit operates from +6V to +16V or +3V to +5.5V DC supply voltage ranges. The EV kit's default input range is configured to +6V to +16V. The buck converter (VCC3) is configured for a +3.3V output providing at least 2A. The boost converter (VSH) is configured for a +7V output providing at least 200mA. The Cuk converter (VSL) is configured for a -7V output providing at least 100mA. The positive gate-voltage linear regulator (VGH) is configured for a +12V output providing at least 20mA. The negative gate-voltage linear-regulator controller (VGL) is configured for a -12V output providing at least 20mA. The negative VCOM buffer (VCOML) is DAC adjustable between -1V and +1V and can source or sink 10mA. The positive VCOM buffer (VCOMH) is DAC adjustable between +2.5V and +4.5V and can source or sink 100mA. The EV kit provides an on-board USB interface circuit to communicate with the SPIK interface circuits in the MAX16927 IC. The EV kit also includes WindowsM 2000-, Windows XPM-, and Windows VistaM-compatible software that provides the user interface for exercising the features of the IC. The program is menu driven and offers a graphical user interface (GUI). Features S +6V to +16V Single-Supply Operation S +3V to +5.5V Single-Supply Operation S Output Voltages +3.3V Output at 2A (VCC3 Buck Converter) +7V Output at 200mA (VSH Boost Converter) -7V Output at 100mA (VSL Cuk Converter) +12V Output at 20mA (VGH Positive Gate-Voltage Linear Regulator) -12V Output at 20mA (VGL Negative Gate-Voltage Linear-Regulator Controller) S DAC-Controlled VCOM Buffers -1V to +1V DAC-Adjustable VCOML (10mA), or +2.5V to +4.5V DAC-Adjustable VCOMH (100mA) S 2.1MHz PWM Switching Frequency (Buck Converter) S 1.2MHz PWM Switching Frequency (Boost and Cuk Converters) S All Output Voltages are Resistor Adjustable (Except for the Buck Converter) S On-Board USB Interface Circuit Generates SPI-Compatible Signals S USB-PC Connection and Power (Cable Included) S PCB Header for User-Supplied SPI-Compatible Signals S Evaluates the MAX16927GTM/V+ in a 48-Pin TQFN (7mm x 7mm x 0.8mm) Package with an Exposed Pad S Windows 2000-, Windows XP-, and Windows Vista (32-Bit)-Compatible Software S Fully Assembled and Tested Ordering Information PART TYPE MAX16927EVKIT+ EV Kit +Denotes lead(Pb)-free and RoHS compliant. SPI is a trademark of Motorola, Inc. Windows, Windows XP, and Windows Vista are registered trademarks of Microsoft Corp. ________________________________________________________________ Maxim Integrated Products1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com. Evaluates: MAX16927 General Description Evaluates: MAX16927 MAX16927 Evaluation Kit Component List DESIGNATION QTY C1, C4, C5, C22, C24 5 C2, C3, C14, C17, C25, C27 DESIGNATION QTY 10FF Q20%, 25V X7R ceramic capacitors (1210) Murata GRM32DR71E106M C102, C113, C115 3 10FF Q20%, 6.3V X5R ceramic capacitors (0805) Murata GRM21BR60J106M 6 0.1FF Q10%, 50V X7R ceramic capacitors (0603) Murata GRM188R71H104K C111, C112 2 10pF Q5%, 50V C0G ceramic capacitors (0603) Murata GRM1885C1H100J C6, C12, C13, C16, C21, C29 6 1FF Q10%, 25V X7R ceramic capacitors (0805) Murata GRM21BR71E105K C114, C122-C127 7 1FF Q10%, 10V X5R ceramic capacitors (0603) Murata GRM188R61A105K C7 1 4.7FF Q20%, 50V X7R ceramic capacitor (1210) Murata GRM32ER71H475M C116 1 2.2FF Q10%, 6.3V X5R ceramic capacitor (0603) Murata GRM188R60J225K C8, C11 2 220pF Q10%, 50V X7R ceramic capacitors (0603) Murata GRM188R71H221K C118, C119 2 22pF Q5%, 50V C0G ceramic capacitors (0603) Murata GRM1885C1H220J C9, C10 2 22pF Q5%, 50V C0G ceramic capacitors (0805) Murata GRM2165C1H220J C120 1 3300pF Q10%, 50V X7R ceramic capacitor (0603) Murata GRM188R71H332K C15 1 47FF Q20%, 25V aluminum electrolytic capacitor (6.3mm x 6mm) SANYO 25CE47AX D1, D2, D3 3 3A, 30V Schottky diodes (M-FLAT) Toshiba CMS02(TE12L,Q) (Top Mark: S2) C18, C19 2 22FF Q20%, 25V X7R ceramic capacitors (1210) Murata GRM32ER71E226M D4 1 2A, 50V fast-recovery diode (SMB) Fairchild ES2A C20, C32 2 1FF Q10%, 10V X7R ceramic capacitors (0603) Murata GRM188R71A105K D5, D6 2 C23, C34 0 Not installed, ceramic capacitors (1210) 200mA, 100V dual diodes (SOT23) Fairchild MMBD4148SE (Top Mark: D4) Central Semi CMPD7000+ (Top Mark: C5C) C26 1 4.7FF Q20%, 25V X5R ceramic capacitor (1206) Murata GRM31CR71E475M C30, C31, C33, C35, C36 0 Not installed, ceramic capacitors (0805) C37, C38 0 Not installed, ceramic capacitors (1206) 11 0.1FF Q10%, 16V X7R ceramic capacitors (0603) Murata GRM188R71C104K C101, C103-C110, C117, C121 DESCRIPTION DESCRIPTION D7 1 Red SMT LED (0603) D101 1 Green SMT LED (0603) FB101 0 Not installed, ferrite bead--short (PC trace) (0603) J1 1 12-pin header JU1, JU2 2 2-pin headers JU4-JU8, JU14-JU17 9 3-pin headers JU9 1 4-pin, 3-way jumper JU10-JU13 4 5-pin, 4-way jumpers L1, L2 2 5.6FH, 2A inductors Sumida CDRH6D26-5R6NC 2_______________________________________________________________________________________ MAX16927 Evaluation Kit DESIGNATION L3 L4 L5 N1 P1, P101 QTY DESCRIPTION 1 3FH, 3A inductor Sumida CDRH6D28-3R0 1 2.2FH, 9A inductor Wurth 744314330 0 Not installed, inductor--short (PC trace) (CDRH6D28) 1 20V, 0.9A n-channel MOSFET (SOT23) Fairchild FDV305N (Top mark 305) 2 -20V, -2.4A p-channel MOSFETs (3 SuperSOT) Fairchild FDN304P_NL (Top Mark: 304) Q1 1 npn bipolar transistor (SOT23) Fairchild MMBT3904_NL (Top Mark: 1A) R1, R10, R31 3 100kI Q5% resistors (0603) R2 1 100kI Q1% resistor (0603) R3 1 715kI Q1% resistor (0603) R4, R5 2 47kI Q5% resistors (0603) R6 1 110kI Q1% resistor (0603) R7 1 10kI Q1% resistor (0603) R8, R9, R16, R18, R19, R103 6 10kI Q5% resistors (0603) R11 1 71.5kI Q1% resistor (0603) R12 1 12.1kI Q1% resistor (0603) R13 1 6.8kI Q5% resistor (0603) R14 1 619kI Q1% resistor (0603) R15 1 51.1kI Q1% resistor (0603) R17 1 2kI Q5% resistor (0603) R21, R34 2 0I Q5% resistors (0805) R22, R23, R26-R30, R35, R36 0 Not installed, resistors (0805) R24 1 0I Q5% resistor (1206) R25 0 Not installed, resistor--short (PC trace) (1206) R32, R33 2 499kI Q1% resistors (0603) DESIGNATION QTY R37, R101 2 0I Q5% resistors (0603) DESCRIPTION R102 1 220I Q5% resistor (0603) R104 1 2.2kI Q5% resistor (0603) R105 1 1.5kI Q5% resistor (0603) R106, R107 2 27I Q5% resistors (0603) R108 1 1kI Q5% resistor (0603) U1 1 TFT-LCD power supply (48 TQFN-EP*) Maxim MAX16927GTM/V+ U101 1 32-bit microcontroller (68 QFN-EP*) Maxim MAXQ2000-RAX+ U102 1 EEPROM, 93C46-type 3-wire (8 SO) U103 1 UART-to-USB converter (32 TQFP) U104 1 3.3V, 300mA regulator (5 SOT23) Maxim MAX8888EZK33+ (Top Mark: ADQC) U105 1 2.5V, 120mA regulator (5 SC70) Maxim MAX8511EXK25+ (Top Mark: ADV) U106, U107, U108 3 Low-voltage level translators (10 FMAXM) Maxim MAX1840EUB+ USB 1 Type-B right-angle female USB connector Y101 1 16MHz crystal Hong Kong X'tals SSM16000N1HK188F0-0 Y102 1 6MHz crystal Hong Kong X'tals SSL60000N1HK188F0-0 -- 1 USB-A male to USB-B male cable, 6ft (beige) -- 16 Shunts -- 1 PCB: MAX16927 EVALUATION KIT+ *EP = Exposed pad. / V denotes an automotive qualified part. MAX is a registered trademark of Maxim Integrated Products, Inc. _______________________________________________________________________________________3 Evaluates: MAX16927 Component List (continued) Evaluates: MAX16927 MAX16927 Evaluation Kit Component Suppliers SUPPLIER PHONE Central Semiconductor Corp. WEBSITE 631-435-1110 www.centralsemi.com Fairchild Semiconductor 888-522-5372 www.fairchildsemi.com Hong Kong X'tals Ltd 852-35112388 www.hongkongcrystal.com Murata Electronics North America, Inc. 770-436-1300 www.murata-northamerica.com SANYO Electric Co., Ltd. 619-661-6835 www.sanyo.com Sumida Corp. 847-545-6700 www.sumida.com Toshiba America Electronic Components, Inc. 949-623-2900 www.toshiba.com/taec Wurth Electronik GmbH & Co. KG 201-785-8800 www.we-online.com Note: Indicate that you are using the MAX16927 when contacting these component suppliers. MAX16927 EV Kit Files FILE DESCRIPTION INSTALL.EXE Installs the EV kit files on the computer MAX16927.EXE Application program FTD2XX.INF USB driver file UNINST.INI Uninstalls the EV kit software USB_Driver_Help.PDF USB driver installation help file Quick Start 2) Install the EV kit software on the computer by running the INSTALL.EXE program inside the temporary folder. The program files are copied and icons are created in the Windows Start | Programs menu. * User-supplied Windows 2000, Windows XP, or Windows Vista PC with a spare USB port 3) Verify that shunts are installed in their default positions, as shown in Table 1. * +6V to +16V, 1A DC power supply 4) Turn on the power supply and set it to +6V; disable the power supply. 5) Connect the positive terminal of the power supply to the IN3 pad on the EV kit. Connect the negative terminal of the power supply to the PGND3 pad. 6) Connect the USB cable from the PC to the EV kit board. A New Hardware Found window pops up when installing the USB driver for the first time. If a window is not seen that is similar to the one described above after 30s, remove the USB cable from the board and reconnect it. Administrator privileges are required to install the USB device driver on Windows. 7) Follow the directions of the Found New Hardware window to install the USB device driver. Manually specify the location of the device driver to be C:\Program Files\MAX16927 (default installation directory) using the Browse button. During device driver installation, Windows may show a warning Required Equipment * MAX16927 EV kit (USB cable included) * Voltmeter 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. The test procedure assumes that Windows XP SP2 is being used. Similar steps are required for the other supported operating systems. Procedure The EV kit is fully assembled and tested. Follow the steps below to verify board operation. Caution: Do not turn on the power supply until all connections are completed. 1) Visit www.maxim-ic.com/evkitsoftware to download the latest version of the EV kit software, 16927Rxx.ZIP. Save the EV kit software to a temporary folder and uncompress the ZIP files. 4_______________________________________________________________________________________ MAX16927 Evaluation Kit 15) Select Enabled in the VSH radio group box. 16) Verify that the VSH boost-converter output (VSH) is +7V. 17) Select Enabled in the VSL radio group box. 8) Enable the power supply. 18) Verify that the VSL Cuk converter output (VSL) is -7V. 9) Start the EV kit software by opening its icon in the Start | Programs menu. 19) Select Enabled in the VSLS radio group box. 20) 10) Observe as the program automatically detects the connection of the device and starts the main program. After successful connection, the EV kit software main window appears in the upper-left corner of the window, as shown in Figure 1. Verify that the VSLS sequenced Cuk converter output (VSLS) is -7V. 21) Select Enabled in the VGH radio group box. 22) Verify that the VGH positive gate-voltage linear-regulator output (VGH) is +12V. 23) Select Enabled in the VGL radio group box. 24) Verify that the VGL negative gate-voltage linearregulator controller output (VGL) is -12V. 11) Select Enabled in the +3.3V (EN3) radio group box. This enables the buck (+6V to +16V to +3.3V) DCDC. 12) Verify that the VCC3 buck-converter output (VCC3) is +3.3V. 25) 13) Select Enabled in the Input Pwr (ENP) radio group box. Select Positive in the DAC Direction radio group box. 26) Enter 7F into the DAC Value edit box. 14) Select Seq 0: SPI determines which regulator is on in the Power Sequencing (EN2, EN1) radio group box. 27) Verify that the VCOML buffer output (VCOML) is +1V. 28) The EV kit is now ready for additional testing. Table 1. Default Shunt Positions JUMPER SHUNT POSITION PIN CONNECTION JU1 Not installed PGOOD not connected to ENP JU2 Installed JU4 1-2 JU5 JU6 EV KIT FUNCTION ENP controlled by JU10 FLT to LLT_ FLT LXN to R21 J1-6 and the on-board SPI interface circuit (LED indication is active) 1-2 VSL to D6, pin 2 Negative charge pump refers to VSL 2-3 FBN to R2/R3 divider JU7 1-2 VCOMN to VSL JU8 1-2 SYNC to AVL DCDC3 skip mode enabled under light load Spread spectrum enabled Charge pumps powered by LXN FBN receives feedback from VSL through R2/R3 divider VCOMN is powered by VSL JU9 1-2 SSEN to INA JU10 1-2 ENP to LLT_ENP On-board SPI interface controls ENP JU11 1-2 EN1 to LLT_EN1 On-board SPI interface controls EN1 JU12 1-2 EN2 to LLT_EN2 On-board SPI interface controls EN2 JU13 1-2 EN3 to LLT_EN3 On-board SPI interface controls EN3 JU14 2-3 JU15 2-3 CS to LLT_ CS CLK to LLT_CLK On-board SPI interface controls CS On-board SPI interface controls CLK JU16 2-3 DIN to MAXQ_DOUT On-board SPI interface controls DIN JU17 2-3 DOUT to LLT_DIN On-board SPI interface controls DOUT _______________________________________________________________________________________5 Evaluates: MAX16927 message indicating that the device driver Maxim uses does not contain a digital signature. This is not an error condition and it is safe to proceed with installation. Refer to the USB_Driver_Help.PDF document included with the software for additional information. Evaluates: MAX16927 MAX16927 Evaluation Kit Figure 1. MAX16927 EV Kit Software Main Window 6_______________________________________________________________________________________ MAX16927 Evaluation Kit Note: Text in bold indicates user-selectable features in the MAX16927 EV kit software. Graphic User Interface (GUI) Panel The GUI shown in Figure 1 displays the EV kit software main window. This window provides a convenient means to control the device. Use the mouse or press the Tab key to navigate through the GUI controls. The correct SPI write operation is generated to update the device's internal memory registers when any of these controls are executed. The EV kit software main window (Figure 1) divides the EV kit software functions into logical sections: The +3.3V (EN3) and Input Pwr (ENP) sections, the Power Sequencing (EN2, EN1) section, the VSH, VSL, VSLS, VGL, and VGH sections, the VCOMH and VCOML sections, and the Over Temperature and Fault Condition displays. +3.3V (EN3) enables or disables the +3.3V buck converter. Input Pwr (ENP) enables or disables all the outputs on the EV kit, except for the buck-converter output. Power Sequencing (EN2, EN1) selects the power-on sequence. VSH, VSL, VSLS, VGL, and VGH control the VSH, VSL, VSLS, VGL, and VGH, respectively. VCOMH and VCOML control the VCOMH or VCOML directions and outputs. The bottom-left status bar on the main window provides the USB interface circuit connectivity status. The bottomright status bar indicates the EV kit operational status. Software Startup Upon startup of the program, the EV kit software automatically searches for the USB interface circuit connection. The EV kit enters the normal operating mode when the USB connection is detected. The +3.3V (EN3) is Enabled and the Input Pwr (ENP) and VSH, VSL, VSLS, VGL, and VGH are Disabled. The Power Sequencing (EN2, EN1) is set to Seq 0: SPI determines which regulator is on. The VCOMH and VCOML are Off. The DAC Direction is set to Positive. The DAC Value is set to 00. Both the Over Temperature and the Fault Condition display Off. The bottom-left status bar indicates Hardware: Connected, and the bottom-right status bar indicates EV Kit Operational. If the USB connection is not detected, the software prompts the user to retry, exit the program, or enter the demo mode. Demo Mode The EV kit software can enter the demo mode when the USB connection is not detected, by selecting Cancel on the EV kit Software Interface Circuit pop-up window (Figure 2). The software can also enter the demo mode at any time by selecting the Options | Demo Mode menu item in the main window. When in demo mode, all software communication to the EV kit circuit is disabled; however, most of the software GUI is functional. Demo mode allows the user to evaluate the software without hardware connectivity. To exit demo mode, select the Options | Demo Mode menu item. +3.3V (EN3) The +3.3V (EN3) radio group box enables or disables the buck converter. When +3.3V (EN3) is Enabled, VCC3 is On and all 32 bits in the register are set low. When +3.3V (EN3) is Disabled, VCC3 is Off and all 32 bits in the register are set high. Input Pwr (ENP) The Input Pwr (ENP) radio group box enables or disables the device except for the buck converter. When +3.3V (EN3) and Input Pwr (ENP) are Enabled, VSH, VSL, VSLS, VGL, and VGH are controlled by their respective Enabled/Disabled commands. When Input Pwr (ENP) is Disabled, VSH, VSL, VSLS, VGL, and VGH are Off, regardless of their respective Enabled/Disabled commands. Power Sequencing (EN2, EN1) The Power Sequencing (EN2, EN1) radio group box selects the EV kit power sequence. When the Seq 0: SPI determines which regulator is on is selected, the SPI interface determines which regulator is on or off. When Seq 1: (1) VSH, (2) VSL, (3) VGH, (4) VGL is selected, VSH, VSL, VGH, and VGL are powered in the sequence Figure 2. MAX16927 EV Kit Software Interface Circuit Pop-Up Window _______________________________________________________________________________________7 Evaluates: MAX16927 Detailed Description of Software Evaluates: MAX16927 MAX16927 Evaluation Kit stated by the number inside their respective preceding parentheses, and likewise for Seq 2 and Seq 3. disables the VSH soft-start feature. VSH Status displays the VSH On/Off status. VCOMH, VCOML, DAC Direction, DAC Value VSL Enabled/Disabled, Current Limit, VSL Soft-Start, and VSL Status The EV kit software features a panel that contains the VCOMH and VCOML status displays, the DAC Direction radio group box, and the DAC Value edit box. The VCOMH and VCOML status boxes display the VCOMH and VCOML ON/Off states. The DAC Direction radio group box selects the DAC's Positive or Negative direction. The DAC Value edit box accepts a hex number between 00 and 7F to scale the VCOMH or VCOML values. The VCOML values are scaled to between 0 and +1V when the DAC Direction is Positive, or between 0 and -1V when the DAC Direction is Negative. Over Temperature The EV kit software features a panel that displays the device's overtemperature condition. The Over Temperature panel displays On when the device's internal die temperature exceeds +165NC (typ). Fault Condition The EV kit software features a panel that displays the device's fault condition. The Fault Condition panel displays On when one or more of the device's output voltages (except for the buck-converter output) is less than 85% of their regulated values. Reset The Reset button resets the EV kit to the following condition: +3.3V (EN3) = Disabled, Input Pwr (ENP) = Disabled, Power Sequence (EN2, EN1) = Seq 0: SPI determines which regulator is on, DAC Direction = Positive, DAC Value = 00, VSH = Disabled, VSH Current Limit = 100%, VSH Soft Start = checked, VSL = Disabled, VSL Current Limit = 100%, VSL Soft Start = checked, VSLS = Disabled, VGH = Disabled, VGH Soft Start Time = 6.784 mSec, VGL = Disabled, and VGL Soft Start Time = 6.784 mSec. VSH Enabled/Disabled, Current Limit, VSH Soft-Start, and VSH Status The EV kit software features a panel that includes the VSH Enabled/Disabled radio buttons, the Current Limit drop-down list, the VSH Soft Start checkbox, and the VSH Status display. The VSH Enabled/Disabled radio buttons enable or disable the VSH regulator. Enable the +3.3V (EN3) and Input Pwr (ENP) before enabling VSH. The Current Limit drop-down list selects the VSH current limit. The VSH Soft Start checkbox enables or The EV kit software features a panel that includes the VSL Enabled/Disabled radio buttons, the Current Limit drop-down list, the VSL Soft Start checkbox, and the VSL Status display. The VSL Enabled/Disabled radio buttons enable or disable the VSL regulator. Enable the +3.3V (EN3) and Input Pwr (ENP) before enabling VSL. The Current Limit drop-down list selects the VSL current limit. The VSL Soft Start check box enables or disables the VSL soft-start feature. VSL Status displays the VSL On/Off status. VSLS Enabled/Disabled and VSLS Status The EV kit software features a panel that includes the VSLS Enabled/Disabled radio buttons and the VSLS Status display. The VSLS Enabled/Disable radio buttons enable or disable the VSLS switch. Enable the +3.3V (EN3), Input Pwr (ENP), and VSL before enabling VSLS. VSLS Status displays the VSLS On/Off status. VGH Enabled/Disabled, Soft-Start Time, and VGH Status The EV kit software features a panel that includes the VGH Enabled/Disabled radio buttons, the Soft Start Time drop-down list, and the VGH Status display. The VGH Enabled/Disabled radio buttons enable or disable the VGH regulator. Enable the +3.3V (EN3), Input Pwr (ENP), VSH, and VSL before enabling VGH. The Soft Start Time drop-down list selects the VGH soft-start time. VGH Status displays the VGH On/Off status. VGL Enabled/Disabled, Soft-Start Time, and VGL Status The EV kit software features a panel that includes the VGL Enabled/Disabled radio buttons, the Soft Start Time drop-down list, and the VGL Status display. The VGL Enabled/Disabled radio buttons enable or disable the VGL regulator. Enable the +3.3V (EN3), Input Pwr (ENP), VSH, and VSL before enabling VGL. The Soft Start Time drop-down list selects the VGL soft-start time. VGL Status displays the VGL On/Off status. Keyboard Navigation Press the Tab key to select each GUI control. Most of the selected control is indicated by a dotted outline. Using Shift + Tab moves the selection to the previously selected control. Buttons respond to the keyboard's space bar. Some controls respond to the keyboard's up-and-down arrow keys. Activate the program's menu bar by press- 8_______________________________________________________________________________________ MAX16927 Evaluation Kit General Troubleshooting Problem: software reports it cannot find the interface circuit. * Is the interface circuit power LED lit? * Is the USB cable connected? * Has Windows plug-and-play detected the board? Bring up Control Panel System Device Manager, and look at what device nodes are indicated for USB. If there is an "unknown device" node attached to the USB, delete it; this forces plugand-play to try again. * Are jumpers JU10-JU17 properly configured? Detailed Description of Hardware The MAX16927 EV kit contains a buck converter for the VCC3 supply, boost converter for the VSH supply, Cuk converter for the VSL supply, single-stage positive charge-pump for the positive gate-voltage linearregulator supply (VGH), single-stage negative charge pump for the negative gate-voltage linear-regulator controller supply (VGL), DAC-adjustable positive VCOM buffer (VCOMH), and DAC-adjustable negative VCOM buffer (VCOML). Input Power Supply The EV kit operates from +6V to +16V or +3V to +5.5V DC supply voltage ranges. When operating the EV kit from a +6V to +16V power supply, connect the power supply between the IN3 and PGND3 PCB pads. When operating the EV kit from a +3V to +5.5V power supply, connect the power supply between the VCC3 and PGND3 PCB pads. Refer to the Detailed Description section in the MAX16927 IC data sheet for additional information. The EV kit's default input range is configured to +6V to +16V. VCC3, PGOOD, and AVL (Buck Converter) The VCC3 buck converter is configured for a +3.3V output providing at least 2A. The VCC3 buck converter switches at 2.1MHz in a default spread-spectrum mode. The VCC3 buck-converter output is available between the VCC3 and AGND3 PCB pads. The EV kit provides a PGOOD PCB pad that indicates the buck-converter output status. PGOOD is an activehigh output that pulls low when the buck output voltage is below 90% of its nominal value and pulls high when the output voltage is above 92% of its nominal value. The EV kit provides an AVL PCB pad to verify the buck converter's 5V bias voltage. VSH (Boost Converter) The VSH boost converter is configured for a +7V output providing at least 200mA. The VSH boost-converter output voltage can be adjusted from INA to +18V by replacing feedback resistors R11 and R12 (refer to the Boost Converter section in the MAX16927 IC data sheet). Operation at significantly higher output voltages can reduce the available output current and require changes in component values or component voltage rating. VSL (Cuk Converter) The VSL inverted switching regulator is configured for a -7V output providing at least 100mA. The VSL inverted switching-regulator output voltage can be adjusted from -4V to -7V by replacing feedback resistors R2 and R3. If the Cuk converter output is set more negative than -7V, VSL must be disconnected from the VCOMN (refer to the Cuk Converter section in the MAX16927 IC data sheet). Operation at higher negative output voltages can reduce the available output current. VSLS (Sequenced VSL Output) The VSLS output is a sequenced VSL. The VSLS output is controlled by an external n-channel MOSFET (switch). This switch is controlled by the SPI command available at the device's VSLS pin. When the VSLS switch is on, the VSLS PCB pad is connected to the VSL PCB pad through the n-channel MOSFET, allowing VSLS to share the voltage and current with the VSL output for sequencing. VGH, VCP (Positive Gate-Voltage Linear Regulator/Charge Pump) The VGH positive gate-voltage regulator is configured for a +12V output providing at least 20mA. The VGH positive gate-voltage regulator receives power from the VCP. VCP is a single-stage, positive charge pump. The VGH positive gate-voltage regulator's output voltage can be adjusted from +4.5V to +16V by replacing feedback resistors R6 and R7 (refer to the Positive Gate-Voltage Linear Regulator (VGH) section in the MAX16927 IC data sheet). _______________________________________________________________________________________9 Evaluates: MAX16927 ing the F10 key, then press the letter of the desired menu item. When the Alt key is pressed and released, most menu items show one letter underlined, indicating their shortcut key. Evaluates: MAX16927 MAX16927 Evaluation Kit VGL, VCN (Negative Gate-Voltage Linear-Regulator Controller/Charge Pump) The VGL negative gate-voltage regulator is configured for a -12V output providing at least 20mA. The VGL negative gate-voltage regulator receives power from the VCN. VCN is a single-stage, negative charge pump. The VGL negative gate-voltage regulator's output voltage can be adjusted from -4.5V to -16V by replacing feedback resistors R14 and R15 (refer to the Negative GateVoltage Linear-Regulator Controller (VGL) section in the MAX16927 IC data sheet). Note that a short circuit at VGL can destroy the external npn transistor on the EV kit. VCOMN, VCINL, VCOML (Negative VCOM Buffer) The EV kit provides the VCOMN, VCINL, and VCOML PCB pads to access the negative VCOM buffer. The VCOMN PCB pad accepts the power supply to the negative VCOM buffer. The VCINL PCB pad accepts an offset voltage to the negative VCOM DAC output. The VCOML is the negative VCOM buffer output. The negative VCOM buffer output (VCOML) is DAC adjustable between -1V and +1V and can source or sink 10mA. The EV kit can only activate VCOML or VCOMH, but not both. The EV kit is configured with the VCOML active and VCOMH inactive by default. To activate VCOMH on the EV kit, see the VCOMP, VCINH, and VCOMH (Positive VCOM Buffer) section. VCOMP, VCINH, VCOMH (Positive VCOM Buffer) The EV kit provides the VCOMP, VCINH, and VCOMH PCB pads to access the positive VCOM buffer. The VCOMP PCB pad accepts the power supply to the positive VCOM buffer. The VCINH PCB pad accepts an offset voltage to the positive VCOM DAC output. The VCOMH is the positive VCOM buffer output. The positive VCOM buffer output (VCOMH) is DAC adjustable between +2.5V and +4.5V and can source or sink 100mA. VCINH features an internal voltage-divider that sets VCOMH to VCOMP/2 voltage. This voltage is DAC adjustable by Q1V (VSH/2 Q 1V). Also, the basic voltage VCOMP/2 can be overwritten by driving VCINH (this range is +2V to (VCOMP - 2V). The EV kit can only activate VCOML or VCOMH, but not both. The EV kit is configured with the VCOML active and VCOMH inactive by default. To activate VCOMH on the EV kit, follow the steps below: 1) Install a shunt on pins 2-3 of jumper JU4 (charge pump's source from LXP). 2) Install a shunt on pins 2-3 of jumper JU5 (VCN discharge to GNDCP). 3) Install a shunt on pins 1-2 of jumper JU6 (VCOMH on, VCOML off). 4) Replace resistor R14 with a lower value (R14 value is application dependent; refer to the Negative GateVoltage Linear-Regulator Controller (VGL) section in the MAX16927 IC data sheet for additional information). 10 MAX16927 Evaluation Kit Charge-Pump Input Source (LXN, LXP) and VCN Discharging Level (VSL, GNDCP) Primary Enable (ENP) Jumper JU4 selects the charge-pump input source. This input source determines the charge-pump output voltages (VCP, VCN). In addition, jumper JU5 selects the negative charge-pump VCN discharging level. This discharging level further controls the VCN magnitude. See Table 4 for shunt positions. Jumpers JU1 and JU10 enable or disable the device, except for the buck converter. See Table 2 for shunt positions. Fault Output (FLT) Jumper JU2 selects the destination for the fault output signal from the FLT pin. See Table 3 for shunt positions. Note: If the CUK converter is not operated, JU4 must be set to the 2-3 position; JU5 is not used. Table 2. JU1, JU10 Jumper Selection (ENP) SHUNT POSITION ENP PIN CONNECTED TO EV KIT OUTPUTS (NOT INCLUDING THE BUCK CONVERTER) Not installed PGOOD (U1, pin 14) ENP follows status of buck PGOOD (i.e., if buck is running, it activates the ENP automatically) Not installed* 1-2* U107, pin 8 On-board SPI controlled Not installed 1-3 INA (through resistor R16) Not installed 1-4 J1-8 Not installed 1-5 AGND Disabled Not installed Not installed Pulldown Disabled JU1 JU10 Installed Enabled External logic controlled *Default position. Table 3. JU2 Jumper Selection (FLT) SHUNT POSITION FLT PIN CONNECTED TO Installed* J1-6 and U108, pin 10 Not installed J1-6 FLT PIN OUTPUTS SIGNALS TO J1-6 and the on-board SPI interface circuit (LED indication active) J1-6 *Default position. Table 4. JU4 and JU5 Jumper Selection (VCP, VCN) SHUNT POSITION JU4 1-2* (C2 and C3 connected to LXN) 2-3 (C2 and C3 connected to LXP) VCN DISCHARGES TO CHARGE-PUMP OUTPUT VOLTAGES 1-2* VSL VCP = +16.6V VCN = -16.6V 2-3 GNDCP VCP = +16.6V VCN = -9.8V 1-2 VSL VCP = +13.3V VCN = -13.3V 2-3 GNDCP VCP = +13.3V VCN = -6.5V JU5 *Default position. ______________________________________________________________________________________11 Evaluates: MAX16927 Jumper Selection Evaluates: MAX16927 MAX16927 Evaluation Kit Cuk Converter Feedback (FBN) Negative VCOM Buffer Supply (VCOMN) The Cuk converter feedback FBN pin has two functions. The FBN can be used to regulate the Cuk converter output. It can be used to configure the boost convert for a higher power output, and to select whether VCOMH or VCOML is enabled. Refer to the MAX16927 IC data sheet for more advanced features and operations. Jumper JU6 selects the device's Cuk converter's feedback input. See Table 5 for shunt positions. Jumper JU7 selects the device's negative VCOM Buffer supply. See Table 6 for shunt positions. Buck-Converter Sync Input (SYNC) Jumper JU8 selects the device's buck-converter sync input. See Table 7 for shunt positions. Spread-Spectrum Enable (SSEN) Jumper JU9 enables or disables the device's spreadspectrum mode for the boost and Cuk converters. See Table 8 for shunt positions. Table 5. JU6 Jumper Selection (FBN) SHUNT POSITION FBN PIN CONNECTED TO 1-2 INA 2-3* VSL (through voltage dividing-resistors R2 and R3) Not installed *Default position. Not connected CUK CONVERTER OUTPUT (VSL) REGULATED TO * * * Not regulated (Cuk converter off) Install a 0I resistor to R35 to configure the VSH output to +18V at 200mA VCOMH active and VCOML inactive * -7V (if the Cuk converter is set more negative than -7V, VSL must be disconnected from the VCOMN) VCOML active and VCOMH inactive * Not regulated Table 6. JU7 Jumper Selection (VCOMN) VCOMN PIN CONNECTED TO SHUNT POSITION 1-2* VSL 2-3 VCGND Not installed Not connected *Default position. NEGATIVE VCOM BUFFER SUPPLIED BY Table 8. JU9 Jumper Selection (SSEN) SHUNT POSITION SSEN PIN CONNECTED TO BOOST AND CUK CONVERTERS SPREADSPECTRUM MODE VSL 1-2* INA Enabled Not powered 1-3 J1-7 External logic controlled 1-4 AGND Fixed 1.2MHz switching frequency Not installed Internal pulldown Fixed 1.2MHz switching frequency Not powered Table 7. JU8 Jumper Selection (SYNC) SHUNT POSITION SYNC PIN CONNECTED TO BUCK-CONVERTER OPERATING MODE OR SYNCHRONIZATION 1-2* AVL DCDC3 skip mode enabled under light load 2-3 J1-12 *Default position. DCDC3 synchronized to externally provided clock signal *Default position. 12 MAX16927 Evaluation Kit SPI Data Input (DIN) Jumper JU16 selects the device's SPI data-input source. See Table 13 for shunt positions. Buck-Converter Enable (EN3) Jumper JU17 selects the device's SPI data-out destination. See Table 14 for shunt positions. Jumper JU13 enables or disables the device's buck converter. See Table 10 for shunt positions. SPI Chip Select (CS) Jumper JU14 selects the device's SPI chip-select controlling source. See Table 11 for shunt positions. SPI Clock (CLK) Jumper JU15 selects the device's SPI clock source. See Table 12 for shunt positions. Table 9. JU11, JU12 Jumper Selection (EN1, EN2) SPI Data Output (DOUT) Table 11. JU14 Jumper Selection (CS) SHUNT POSITION CS PIN CONNECTED TO 1-2 J1-1 2-3* U106, pin 8 Not installed Internal pullup VSH, VSL, VSLS, VGH, AND VGL OUTPUT SEQUENCING SHUNT POSITION CLK PIN CONNECTED TO JU12 (EN2) 1-2* 1-2* On-board SPI controlled 1-2 J1-2 2-3* U107, pin 7 1-4 External logic controlled; Connect EN1 to J1-9; Connect EN2 to J1-10 Not installed Not connected 1-5 Seq 0: SPI determines which regulator is on 1-3 Seq 1: (1) VSH, (2) VSL, (3) VGH, (4) VGL 1-5 Seq 2: (1) VSL, (2) VSH, (3) VGL, (4) VGH 1-3 Seq 3: (1) VSL, (2) VSH, (3) VGH, (4) VGL, (5) VSLS 1-3 On-board SPI controller No controlling source *Default position. JU11 (EN1) 1-5 External SPI controller Table 12. JU15 Jumper Selection (CLK) SHUNT POSITION 1-4 SPI CHIP SELECT CONTROLLED BY *Default position. Table 10. JU13 Jumper Selection (EN3) SHUNT POSITION EN3 PIN CONNECTED TO 1-2* U101, pin 63 1-3 IN3 (through resistor R8) 1-4 J1-11 1-5 AGND3 Not installed Not allowed BUCK-CONVERTER OUTPUT On-board SPI controlled Enabled External logic controlled Disabled SPI CLOCK SUPPLIED BY External SPI controller On-board SPI controller No clock source *Default position. Table 13. JU16 Jumper Selection (DIN) SHUNT POSITION DIN PIN CONNECTED TO 1-2 J1-3 2-3* U101, pin 39 Not installed Not connected SPI DATA INPUT SUPPLIED BY External SPI controller On-board SPI controller No data-input source *Default position. Table 14. JU17 Jumper Selection (DOUT) SHUNT POSITION DOUT PIN CONNECTED TO SPI DATA OUTPUT SENT TO 1-2 J1-4 External SPI controller 2-3* U106, pin 10 On-board SPI controller Not installed Not connected No data-output destination *Default position. Not allowed *Default position. ______________________________________________________________________________________13 Evaluates: MAX16927 Output Sequencing (EN1, EN2) Jumpers JU11 and JU12 select the device's output sequencing for the VSH, VSL, VSLS, VGH, and VGL. See Table 9 for shunt positions. Evaluates: MAX16927 MAX16927 Evaluation Kit Figure 3a. MAX16927 EV Kit Schematic (Sheet 1 of 2) 14 MAX16927 Evaluation Kit Evaluates: MAX16927 Figure 3b. MAX16927 EV Kit Schematic (Sheet 2 of 2) ______________________________________________________________________________________15 Evaluates: MAX16927 MAX16927 Evaluation Kit 1.0" Figure 4. MAX16927 EV Kit Component Placement Guide--Component Side 16 MAX16927 Evaluation Kit Evaluates: MAX16927 1.0" Figure 5. MAX16927 EV Kit PCB Layout--Component Side ______________________________________________________________________________________17 Evaluates: MAX16927 MAX16927 Evaluation Kit 1.0" Figure 6. MAX16927 EV Kit PCB Layout--GND Layer 2 18 MAX16927 Evaluation Kit Evaluates: MAX16927 1.0" Figure 7. MAX16927 EV Kit PCB Layout--PWR Layer 3 ______________________________________________________________________________________19 Evaluates: MAX16927 MAX16927 Evaluation Kit 1.0" Figure 8. MAX16927 EV Kit PCB Layout--Solder Side 20 MAX16927 Evaluation Kit Evaluates: MAX16927 1.0" Figure 9. MAX16927 EV Kit Component Placement Guide--Solder Side ______________________________________________________________________________________21 MAX16927 Evaluation Kit Evaluates: MAX16927 Revision History REVISION NUMBER REVISION DATE 0 10/10 DESCRIPTION Initial release PAGES CHANGED -- 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. 22 (c) Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 2010 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc. Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Maxim Integrated: MAX16927EVKIT+