SLLU361 December   2022

 

  1.   Abstract
  2.   Trademarks
  3. 1Cautions and Warnings
  4. 2Introduction
  5. 3Quick Start Guide
  6. 4Hardware and Software Overview
    1. 4.1 Hardware Connections Overview – MCT8315EVM
    2. 4.2 Connection Details
    3. 4.3 MSP430FR2355 Microcontroller & User Interface
    4. 4.4 LED Lights
    5. 4.5 User-Configurable Settings
  7. 5Hardware Setup
  8. 6MCT8315 GUI Application
    1. 6.1 Running the GUI
    2. 6.2 Offline Installer
  9. 7MSP430FR2355 Interface Firmware
    1. 7.1 Downloading Code Composer Studio and Importing MSP430FR2355 Interface Firmware Code
    2. 7.2 Using the eZ-FET to Program the MSP430FR2355
  10. 8Schematics
    1. 8.1 Main Supply and Pi Filter
    2. 8.2 Connectors and Interface
    3. 8.3 USB to UART
    4. 8.4 MCU Programming and Debug
    5. 8.5 MSP430FR2355 MCU
    6. 8.6 MCT8316A 3-Phase Sensorless Trapezoidal Control Integrated Driver
    7. 8.7 Buck Regulator
    8. 8.8 Status LEDs
    9. 8.9 Switches and Speed Input
  11. 9Revision History

Connection Details

Figure 4-2 shows the connections made to the MCT8315EVM in order to spin a 3-phase sensorless Brushless-DC motor.

An 4.5-V to 35-V power supply or battery is connected to the VBAT or VM and PGND terminals on connector J7. There is a reverse polarity protection and Pi filter implemented on the VBAT and PGND terminals. To bypass the reverse polarity protection and Pi filter, connect the power supply to the VM terminal or VM test point on the board and PGND.

The three phases of the BLDC motor connect directly to the A, B, and C terminals of the screw terminal connector J8 provided on the MCT8315EVM.

GUID-AEDF13DA-789A-4BC4-B47C-F99BBA68AE71-low.pngFigure 4-2 Connections from Motor to MCT8315EVM
Figure 4-3 shows where the micro-USB cable is plugged into the MCT8315EVM to provide communication between evaluation module and GUI. The USB data and 5 V power from the USB is converted into UART data and 3.3 V power to power the MSP430FR2355 microcontroller. The 5 V from the USB power is limited to 500 mA and the 3.3 V from the FTDI chip is limit to 30 mA. If the user wishes to supply more current to these rails, they may use the 5V_SEL jumper J3 and 3V3_SEL jumper J5 to connect external power rails.

GUID-E3CF183B-8838-48CC-BBD5-4111171B83B2-low.pngFigure 4-3 Micro-USB Connector and UART for MCT8315EVM