Overview
The DRV8432EVM is a motor drive evaluation board designed by Texas Instruments, featuring the DRV8432 dual full-bridge PWM motor driver. This evaluation module is intended to facilitate the development and testing of motor drive systems. The DRV8432 is capable of delivering up to 2 x 7-A continuous output current and 2 x 12-A peak current per device, with the option to parallel the outputs to achieve 14-A continuous current or 24-A peak current. The board includes advanced protection features such as short-circuit protection, overcurrent protection, undervoltage protection, and two-stage thermal protection.
Key Specifications
| Parameter | Value |
|---|---|
| Output Stage Voltage | 0 to 52.5 Volts |
| System Supply Voltage | 12 Volts |
| Number of Output | 4 × Half Bridge, 2 × Full Bridge, 1 × Paralleled Full Bridge |
| Output Current per Output Pin | Up to 12-A peak, 7 A continuous |
| Power Supply Requirements |
|
Key Features
- PWM input motor driver module
- Self-contained protection system including short-circuit and thermal protection
- Double-side, plated-through PCB layout
- Operable in various modes: dual full bridges, four half bridges, or parallel full bridge
- Hardware switches for mode control and manual reset
- External PWM inputs using an MCU controller module or signal generator
Applications
The DRV8432EVM is suitable for a variety of motor drive applications, including but not limited to:
- Brushed DC motor drives
- PWM-controlled motor systems
- Industrial automation
- Robotics
- Automotive systems requiring high-current motor control
Q & A
- What is the maximum output current of the DRV8432?
The DRV8432 can deliver up to 2 x 7-A continuous output current and 2 x 12-A peak current per device. In parallel mode, it can achieve 14-A continuous current or 24-A peak current. - What are the power supply requirements for the DRV8432EVM?
The system requires two power supplies: one 12-V supply for system power, logic, and gate drive, and another adjustable supply from 0 V to 52.5 V for the output stage power supply. - What protection features does the DRV8432 have?
The DRV8432 includes short-circuit protection, overcurrent protection, undervoltage protection, and two-stage thermal protection. - Can the DRV8432EVM be used in different output configurations?
Yes, the DRV8432EVM can be operated in dual full bridge, four half bridge, or parallel full bridge configurations. - How do I connect the power supplies to the DRV8432EVM?
Connect the power supplies using stripped wires to the on-board terminal blocks, ensuring correct polarities. The system power supply connects to GVDD and GND, and the output stage power supply connects to PVDD and GND. - What is the recommended power-up sequence for the DRV8432EVM?
Turn on the 12-V GVDD power supply, enable PWM signals, set the RESET switches to high, and then turn on the external PVDD power supply gradually. - How do I reset the DRV8432EVM after a fault condition?
Flip the RESET_AB and/or RESET_CD switches to low and back to high to clear the fault. If this does not work, turn off the 12-V GVDD power supply and then turn it back on. - Can I use external MOSFETs to reduce the current load on the DRV8432?
Yes, but ensure the MOSFETs meet the load requirements and are properly specified to handle the current and voltage. - What is the relationship between PWM_A and PWM_B in Parallel Full Bridge mode?
In PFB mode, PWM_A and PWM_B should be complementary to control the outputs OUT_A and OUT_C. Detailed timing and signal relationships can be found in the device's documentation and application notes. - How can I implement current and RPM sensing with the DRV8432?
Current and RPM sensing can be implemented using external sensors and feedback mechanisms. Refer to application notes and the device's datasheet for detailed instructions.
