DRV8300xxx-EVM User’s Guide
1 Introduction
1.1 Overview
The DRV8300 is a gate driver IC for three-phase motor drive applications. It provides three high-accuracy trimmed and temperature compensated half-bridge drivers, each capable of driving high-side and low-side N-type MOSFETs.
Along with the hardware of the DRV8300, the TMS320F280049C microcontroller-based board has reference software that sends necessary signals to the DRV8300 to spin a 3-phase Brushless-DC motor. GuiComposer software allows the user to program settings, enable the motor to spin, and monitor the system from fault conditions.
Figure 1-1 Block Diagram1.2 Purpose and Scope
This document is designed to be used as a startup guide to the DRV8300 EVM and LAUNCHXL-F280049C solution. This document is intended for the engineers involved in the design, implementation, and validation of DRV8300 + TMS320F280049C reference software.
The scope of this document is to provide the user with a guide to evaluate the DRV8300 device with a TMS320F280049C isolated board. This document covers the hardware connections required between boards and external motor/supplies. When the hardware connections are complete, the user is required to download the necessary tools and software to spin a motor.
The reference software is composed of GuiComposer software with sensored trapazoidal algorithm for BLDC motor control.
2 Hardware and Software Overview
2.1 Hardware Connections Overview – DRV8300Dxxx-EVM + LAUNCHXL-F280049C
The following section describes the EVM hardware and connections to the external supply, hall sensors, PC via USB, and motor.
Figure 2-1 EVM Board Overview
Figure 2-2 DRV8300Dxxx-EVM Mating to
LAUNCHXL-F280049CThe DRV8300Dxxx-EVM must plug into the lower LAUNCHXL-F280049C Launchpad headers as shown below.
Figure 2-3 PVDD Input (J4)To minimize the risk of potential shock hazard and personal injury, remove all power connections and interfaces to the DRV8300Dxxx-EVM when not in use.
The DRV8300Dxxx-EVM is designed for an input supply from 6 VDC to 100 VDC and up to 25-A continuous drive current (software limited). The input connects to J4 with the noted polarity. PVDD_TP connects to the same node but must not be used for high current input. PVDD input is fused with a 30 A fuse and the input connector is rated for 32 A.
Figure 2-4 Hall Sensor Input and Power
Connections (J7)Hall sensors are connected to J7 including hall power and GND. The 3.3 VDC supply to the Hall sensors is supplied from the 3.3 V LDO on the EVM. External hall power can be input through the HALL_EXT test point if a different supply or voltage level is desired. To use the included 3.3 V LDO to power the halls, connect J3 on the right side to pins 1:2 as shown. To use HALL_EXT, connect J3 on the left side to pins 2:3. To insert or remove wires/terminals on J7, use a flat blade screwdriver to push down the respective tab on top of the J7 connector.
Figure 2-5 Motor Phase Connector
(J5)Motor Phase connections must match the hall sensor connection sequence. For example, MOTA must match HALL_A, MOTB must match HALL_B, MOTC must match HALL_C. The phases must also be in sequential order; A, then B, then C.
If the motor phases do not match the hall sensors or the connections are made out of order, the motor will not spin smoothly and current consumption will increase.
The three phase inputs of the motor connect to MOTA/MOTB/MOTC through connector J5.
