DRV8328xEVM User's Guide
Abstract
This document is provided with the DRV8328 customer evaluation module (EVM) as a supplement to the DRV8328x data sheet (DRV8328 4.5-V to 60-V Three-Phase Smart Gate Driver). This User's Guide details the implementation of the EVM and shows how to set up and power the board.
The DRV8328AEVM comes automatically populated with and configured for the DRV8328A. It is also compatible for the DRV8328B, DRV8328C, and DRV8328D variants (see Section 3.4.1 and Section 3.4.2), but the user will need to modify the board to make it compatible for each variant (see Table 3-3 and Table 3-4).
1 Introduction
The DRV8328 is a 4.5-V to 60-V triple half-bridge gate driver IC for motor drive applications. The DRV8328 provides a bootstrap architecture to drive 3 high-side and 3 low-side N-channel MOSFETs with up to 1-A peak source and 2-A peak sink current. The DRV8328 can also support up to 100% PWM duty cycle inputs with an integrated trickle charge pump. All variants are in compact QFN packages with hardware configurations and provide ultra-low sleep mode current. Additionally, variants offer a variety of optional features including a dead time pin, overcurrent level pin, driver shutoff pin, and integrated LDO capable of driving 3.3 V and 80 mA. A summary of the variants below can be seen in Table 1-1.
Device Name | LDO Output | DT pin and VDSLVL pin | PWM Mode |
|---|---|---|---|
DRV8328A | N/A | Available | 6x PWM |
DRV8328B | N/A | Available | 3x PWM |
DRV8328C | 3.3 V | N/A | 6x PWM |
DRV8328D | 3.3 V | N/A | 3x PWM |
The DRV8328AEVM can be interfaced with the TMS320F280049C microcontroller on the LAUNCHXL-F280049C LaunchPad in correspondence with the reference software to provide the algorithm to the DRV8328 to control the BLDC motor.
This document serves as a startup guide to supplement the DRV8328AEVM + LAUNCHXL-F280049C BLDC motor control demo kit. It also is intended to help engineers design, implement, and validate reference hardware and software for the LaunchPad MCU and DRV8328. For step by step details on connecting the LAUNCHXL-F280049C + DRV8328AEVM, refer to Section 4.
Figure 1-1 DRV8328AEVM PCB Layout2 Quick Start Guide
The DRV8328AEVM requires a power supply with a recommended operating range from 4.5-V to 60-V. To setup and power the EVM, follow the sequence below:
Connect the power supply ground to the GND of the 2-pin power connector J9 and the power supply positive terminal to the PVDD pin of J9. Ensure jumpers JP1, JP2, and JP3 of the LAUNCHXL-F280049C are not populated (DNP) to ensure that the LaunchPad is powered by the DRV8328AEVM and the motor supply is isolated from the USB.
Connect the motor phases to OUTA, OUTB, and OUTC in the correct order to connector J12. For sensored applications, connect the Hall sensors to the appropriate locations on the 5-pin connector J10 as shown in Figure 3-2. Select AVDD or EXT on jumper J11 to choose the Hall power source voltage.
Mate the DRV8328AEVM onto the top half of the LAUNCHXL-F280049C (LaunchPad Headers J1/J3 and J2/J4) as shown in Figure 3-3. The motor and power connectors should face the same direction as the Micro-USB connector on the LaunchPad.
Remove R26 if toggling nSLEEP from switch on board. Place nSLEEP switch in WAKE position.
Power on the DRV8328AEVM.
Connect a Micro-USB cable from the computer into the Micro USB connector on the top of the LAUNCHXL-F280049C as shown in Figure 3-3.