Evaluate: MAX20067 MAX20067 Evaluation Kit/ MAX20067 Evaluation System General Description Benefits and Features The MAX20067 evaluation kit (EV kit) is a fully assembled 2.7V to 5.5V Input Range and tested surface-mount PCB that provides the voltages Default Output Voltage and features required for automotive thin-film transistor 12V Output at 200mA, (Boost Converter) (TFT), liquid-crystal display (LCD) applications. The EV 16V Output at 10mA (Positive-Gate Voltage Regulator) kit includes a synchronous boost converter, double-stage -6V Output at 3mA (Negative-Gate Voltage Regulator) positive charge pump, double-stage negative charge 6V Output at 130mA (VCOM Buffer) pump, VCOM buffer, and gate-shading push-pull switch. Selectable Switching Frequency (2.2MHz or 400kHz) The EV kit can operate from 2.7V to 5.5V input voltages with Spread-Spectrum Option and is optimized for automotive TFT-LCD applications. Double-Stage Positive- and Negative-Regulated The EV kit can be configured to operate in stand-alone 2 Charge Pumps mode or in I C mode. The boost converter is configured for a 12V output that provides at least 200mA. The pos- Gate Shading Enabled itive-gate voltage regulator provides 16V output and the Full Sequencing Flexibility negative-gate voltage regulator provides -6V. The VCOM 2 2 I C Programmability buffer provides an I C-adjustable output voltage initially biased at 6V. Dedicated GUI 2 The EV kit provides an I C interface that can operate in con- C Driver Available junction with the MINIQUSB+ adapter board or a third-party Proven PCB Layout 2 I C master, such as a general-purpose microcontroller. The Fully Assembled and Tested EV kit also includes Windows -compatible software that provides a simple graphical user interface (GUI) for exercis- ing the features of the IC. The EV system includes both the Ordering Information appears at end of data sheet. EV kit and the MINIQUSB+ adapter board. Windows is a registered trademark and registered service mark of Microsoft Corporation. 319-100065 Rev 0 8/17MAX20067 Evaluation Kit/ Evaluate: MAX20067 MAX20067 Evaluation System 2 I C Mode MAX20067 EV Kit Files 1) Visit www.maximintegrated/evkitsoftware to FILE DECRIPTION download the latest version of the EV kit software, MAX20067GUISetupVxx.exe Windows GUI Installer MAX20067GUISetupVxx.exe. 2) Install the EV kit software (GUI) on your PC by running the MAX20067GUISetupVxx.exe program. Quick Start The EV kit software application will be installed together Required Equipment with the required MINIQUSB+ drivers. MAX20067 EV kit 3) Verify that shunts are installed across pins 1-2 on 2.7V to 5.5V, 3A power supply jumpers J1J3 and J5J9. Voltmeter 4) Verify that a shunt is installed across pins 2-3 on jumper J4. MINIQUSB+ interface board with USB cable 5) Connect the MINIQUSB+ interface boards P3 header User-supplied Windows-compatible PC with a spare to the J10 header on the EV kit. USB port 6) Connect the positive terminal of the power supply to Note: In the following sections, software-related items are the TFT POWER IN PCB pad. Connect the negative identified by bolding. Text in bold refers to items directly terminal of the power supply to the PGND PCB pad. from the EV kit software. Text in bold and underlined refers to items from the Windows operating system. 7) Set the power-supply TFT POWER IN to 5V. 8) Turn on the power supply. Procedure 9) Verify that the green LED (DS1) is on. The EV kit is fully assembled and tested. Follow the steps below to verify board operation: 10) Launch the EV kit software application. Manual Mode 11) From the EV kit software toolbar, select Device 2 Scan for Address. The GUI scans the I C bus for 1) Verify that shunts are installed across pins 1-2 on available slave addresses on the bus and selects the jumpers J1J9. 2 first one (in this case, the MAX20067 I C address). 2) Connect the positive terminal of the power supply 2 Press OK once the MAX20067 I C address has been to the TFT POWER IN PCB pad and the negative found. terminal to the PGND PCB pad. 12) Verify that the status bar in the bottom-right corner 3) Set the power-supply TFT POWER IN to 5V. of the GUI displays EV Kit: Connected, as shown in 4) Turn on the power supply. Figure 1. 5) Verify that the green LED (DS1) is on. 13) In the 0x02 REGULATORS CONTROL register group box, check in order: EN BST, EN AVDD, EN VGON, 6) Verify that the boost converter (AVDD PCB pad) is EN VGOFF, and click the Read All button. 12V. 14) In the 0x03 REGULATORS POWER STATUS (Read 7) Verify that the VCOM buffer (VCOM PCB pad) Only) register group box, verify that the BST ON, regulator is 6V. AVDD ON, VGON ON, VGOFF ON, and VCOM 8) Verify that the positive-gate voltage regulator (VGON ON indicators are green. PCB pad) is approximately +16V. 15) For more details on how to use the GUI and all the 9) Verify that the negative-gate voltage regulator features available, click on the GUI Help menu item. (VGOFF PCB pad) is approximately -6V. Maxim Integrated 2 www.maximintegrated.com