Texas Instruments DRV8432EVM, CC2541 User Manual
User's Guide
SLOU291AA–May 2010–Revised May 2012
DRV8432EVM Motor Drive Evaluation Board
The DRV8432 customer evaluation module demonstrates the operation and performance of the DRV8432
device from TI. 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 DRV8432EVM Motor Drive Evaluation Board – Top View.................................................... 3
2 The TI DRV8432EVM Motor Drive Evaluation Board – Bottom View................................................ 3
3 DRV8432EVM Schematic.................................................................................................. 6
4 DRV8432EVM – Top Layer Composite.................................................................................. 7
5 DRV8432EVM – Top Layer Copper...................................................................................... 7
6 DRV8432EVM – 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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Introduction
1 Introduction
1.1 Description
The DRV8432 is a dual full-bridge PWM motor driver. It has a maximum recommended supply voltage
of 52.5 V. The DRV8432 is capable of delivering 2 x 7-A continuous output current and 2 x 12-A peak
current per device. Furthermore, the outputs can be paralleled to drive 14-A continuous current or 24-A
peak current. The DRV8432 has an advanced protection system consisting of short-circuit protection,
overcurrent protection, undervoltage protection, and two-stage thermal protection.
The DRV8432EVM 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 an MCU controller module or signal generator. The outputs and power supplies are
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 DRV8432EVM Features
• PWM input motor driver module
• Self-contained protection system (short-circuit and thermal)
• Double-side, plated-through PCB layout
1.3 DRV8432EVM Specifications
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Table 1. Key Parameters
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
2
DRV8432EVM Motor Drive Evaluation Board SLOU291AA–May 2010–Revised May 2012
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Introduction
Figure 1. The TI DRV8432EVM Motor Drive Evaluation Board – Top View
Figure 2. The TI DRV8432EVM 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 DRV8432EVM 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. Use enough wire gauge such that the
impedance is relatively low. The output stage supply should use at least AWG 19 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 – 52.5 V 14 A 19 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 12-V 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 0 V–52.5 V 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 details.
2. Set RESET_AB (S1) and RESET_CD (S2) switches to low (RESET) position. If using an external MCU
to control RESET, place the S1 and S2 switches in the middle position.
3. Prepare the PWM signals needed to control the power stage and make sure that PWM logic is 3.3 V
not 5 V. 5 V will damage the device inputs.
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2.1.3 Power Up
The DRV8432 device doesn't require a special power-up sequence, but the following sequence is
recommended for the EVM.
1. Turn on GVDD (12 V) 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 the device shuts down due to any fault conditions, flip RESET_AB and/or RESET_CD switches to
low and back to HIGH to clear the fault and reset the device. If this doesn't work for any reason, turn 12-V
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.
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DRV8432EVM Motor Drive Evaluation Board SLOU291AA–May 2010–Revised May 2012
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Operation
Table 3. Mode Pin Configurations
MODE PINS OUTPUT DESCRIPTION
M3 M2 M1
0 0 0 2 FB or 4 HB Dual Full Bridges (two PWM inputs each full bridge) or four half bridges with cycle-by-cycle
0 0 1 2 FB or 4 HB Dual full bridges (two PWM inputs each full bridge) or four half bridges with OC latching
0 1 0 1 PFB Parallel full bridge with cycle-by-cycle current limit
0 1 1 1 FB Dual Full Bridges (one PWM input each full bridge with complementary PWM on second half
1 x x Reserved
CONFIGURATION
current limit
shutdown (no cycle-by-cycle current limit)
bridge) with cycle-by-cycle current limit
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