Texas Instruments DRV8412EVM User Manual
User's Guide
SLOU287–January 2010
DRV8412EVM Motor Drive Evaluation Board
The DRV8412 customer evaluation module demonstrates the operation and performance of the DRV8412
device from Texas Instruments. The EVM can be used with a MCU controller module or can be wired into
an existing system.
Contents
1 Introduction .................................................................................................................. 2
2 Operation ..................................................................................................................... 4
3 Schematics, PCB Layers, and Bill of Materials ......................................................................... 6
List of Figures
1 The TI DRV8412EVM Motor Drive Evaluation Board – Top View.................................................... 3
2 The TI DRV8412EVM Motor Drive Evaluation Board – Bottom View................................................ 3
3 DRV8412EVM Schematic.................................................................................................. 6
4 DRV8412EVM – Top Layer Composite.................................................................................. 7
5 DRV8412EVM – Top Layer Copper...................................................................................... 7
6 DRV8412EVM – Bottom Copper.......................................................................................... 8
List of Tables
1 Key Parameters............................................................................................................. 2
2 Power Supply Requirements .............................................................................................. 4
3 Mode Pin Configurations................................................................................................... 5
4 Bill of Materials ............................................................................................................. 8
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1
Introduction
1 Introduction
1.1 Description
The DRV8412 is a dual full bridge PWM motor driver. It has a maximum recommended supply voltage
of 50V with an absolute maximum of 70V. The DRV8412 is capable of delivering 2x3A continuous
output current and 2x6A peak current per device. The DRV8412 has an advanced protection system
consisting of short-circuit protection, overcurrent protection, undervoltage protection, and two-stage
thermal protection.
The DRV8412EVM can be operated with either two full bridge outputs or 4 half bridge outputs. It can
also be used in parallel mode to double the current capability. The unit can be operated with external
PWM inputs using a MCU controller module or signal generator, etc. The outputs and power supplies
can be connected using stripped wires by connecting them to the on-board terminal blocks. The EVM
module also has hardware switches to control the modes and to allow a manual reset.
1.2 DRV8412EVM Features
• PWM input motor driver module
• Self-contained protection system (short-circuit and thermal)
• Double-side, plated-through PCB layout
1.3 DRV8412EVM Specifications
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Table 1. Key Parameters
Output Stage Voltage 0 to 50 Vollts
System Supply Voltage 12 Volts
Number of Output 4 × Half Bridge, 2 × Full Bridge
Output Current per Output Pin Up to 6A peak, 3 A continuous
2
DRV8412EVM Motor Drive Evaluation Board SLOU287–January 2010
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Introduction
Figure 1. The TI DRV8412EVM Motor Drive Evaluation Board – Top View
Figure 2. The TI DRV8412EVM Motor Drive Evaluation Board – Bottom View
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Operation
2 Operation
2.1 Quick Start List for Stand-Alone Operation
Follow these steps to use the DRV8412EVM stand-alone or when connecting it into existing circuits or
equipment. Connections to the EVM module can be made by inserting stripped wire for the power supplies
and output connections.
2.1.1 Power Supply
Two power supplies are required to power up the EVM. One is needed for system power, logic and gate
drive, while the second is for the output stage power supply. Please use enough wire gauge such that the
impedance is relatively low. The output stage supply should use at least AWG 22 wire.
Table 2. Power Supply Requirements
Description Voltage Range Current Requirements Wire Size
System Power Supply 12 V 1 A 26 AWG
Output Stage Power Supply 0 – 50 V 6 A 22 AWG
2.1.2 Evaluation Module Preparation Inputs and Outputs
1. Ensure that all external power sources are set to OFF.
2. Connect load(s) across the outputs (OUTX) or between the outputs and ground depending on the
configuration requirement.
3. Connect an external 12V power supply to the terminal block marked GVDD and GND (J2). Make sure
the wires are connected with correct polarities.
4. Connect an external regulated power supply adjustable from 0V - 50V to the terminal block marked
PVDD and GND (J5). Make sure the wires are connected with correct polarities.
Control Signals
1. Install the mode jumpers on M3, M2, and M1 depending on the mode desired. See "Mode Pin
Configurations" table for detail.
2. Set RESET_AB (S1) and RESET_CD (S2) switches to low (RESET) position.
3. Prepare the PWM signals needed to control the power stage and make sure that PWM logic is 3.3V
not 5V.
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2.1.3 Power Up
The DRV8412 device doesn't require a special power up sequence, but the following sequence is
recommended for the EVM.
1. Turn on GVDD (12V) power supply.
2. Enable PWM signals.
3. Set RESET_AB (S1) and RESET_CD (S2) switches to high (NORMAL OPERATION) position.
4. Turn on the external PVDD power supply to the desired voltage gradually.
5. Adjust the duty cycle of PWM input signals to the desired value. The EVM should begin to operate
normally.
2.1.4 Fault Conditions
When device shuts down due to any fault conditions, flip RESET_AB and/or RESET_CD switches back
and forth to clear the fault and reset the device. If this doesn't work for any reason, turn 12V GVDD power
supply off and on again to clear the latch. Please inspect the board and test condition carefully to
understand the problem before next operation.
4
DRV8412EVM Motor Drive Evaluation Board SLOU287–January 2010
Copyright © 2010, Texas Instruments Incorporated
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