Texas Instruments DRV10974 EVM User Manual
User's Guide
SLVUB95C–December 2017–Revised August 2018
DRV10974 Evaluation Module
This document is provided with the DRV10974 customer evaluation module (EVM) as a supplement to
DRV10974 Three-Phase, Sensorless BLDC Motor Driver. The user's guide details the hardware
implementation of the EVM and gives a step-by-step introduction to device operation.
Contents
1 DRV10974 EVM Kit Contents.............................................................................................. 3
2 Introduction ................................................................................................................... 3
2.1 Features.............................................................................................................. 3
3 Quick Start Guide............................................................................................................ 5
4 DRV10974 Onboard Connections......................................................................................... 7
4.1 Connector (P1) for Power Input................................................................................... 7
4.2 Interface Connector (P2) for Phase Windings of Motor........................................................ 8
5 DRV10974 Package......................................................................................................... 9
6 User Interface .............................................................................................................. 10
6.1 Jumpers ............................................................................................................ 10
6.2 Switch .............................................................................................................. 11
6.3 Test Points ......................................................................................................... 11
7 CS, RMP, and ADV Resistor Selection ................................................................................. 12
7.1 CS Resistor Table................................................................................................. 12
7.2 RMP Resistor Table .............................................................................................. 13
7.3 ADV Resistor Table .............................................................................................. 13
8 Schematic .................................................................................................................. 14
9 Bill of Materials (BOM)..................................................................................................... 15
10 EVM Documentation ...................................................................................................... 16
1 DRV10974 EVM ............................................................................................................. 4
2 DRV10974 EVM With Various Connections and User Interface ...................................................... 5
3 Jumper Configurations for Controlling Speed With Analog Voltage .................................................. 6
4 Jumper Configurations for Controlling Speed With PWM Signal...................................................... 6
5 Power Input Terminal Block (P1) .......................................................................................... 7
6 Motor Phase Windings Input Terminal Block (P2) ...................................................................... 8
7 DRV10974PWP Pinout ..................................................................................................... 9
8 CS Receptacle (J10)....................................................................................................... 10
9 ADV Receptacle (J8) ...................................................................................................... 10
10 RMP Receptacle (J9)...................................................................................................... 10
11 Speed Command Input Select Header (J3) ............................................................................ 11
12 Potentiometer Power Header (J2) ....................................................................................... 11
13 DRV10974 EVM Schematic............................................................................................... 14
1 Connector P1: 2-Terminal Connector to Connect Power .............................................................. 7
2 Connector P2: 3-Terminal Connector to Connect 3-Phase BLDC Motor ............................................ 8
3 DRV10974PWP Pinout ..................................................................................................... 9
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List of Figures
List of Tables
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4 Test Point Descriptions.................................................................................................... 11
5 CS Resistor Table.......................................................................................................... 12
6 RMP Resistor Table ....................................................................................................... 13
7 ADV Resistor Table ....................................................................................................... 13
8 Bill of Materials for DRV10974EVM...................................................................................... 15
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DRV10974 Evaluation Module
SLVUB95C–December 2017–Revised August 2018
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1 DRV10974 EVM Kit Contents
The DRV10974 evaluation kit contains the DRV10974 EVM.
2 Introduction
The DRV10974 EVM is an evaluation platform for the DRV10974 three-phase, sensorless, BLDC motor
driver.
2.1 Features
The EVM has the following features:
• 180° Sinusoidal Commutation
• Soft Start With Resistor-Configurable Acceleration Profile
• Protection Features:
– Overcurrent
– Undervoltage
– Overtemperature
– Motor-Lock Detect and Restart
This document describes functions and locations of test points, jumpers, and connectors present on the
DRV10974EVM board. For detailed information about the DRV10974 device, see DRV10974 Three-
Phase, Sensorless BLDC Motor Driver.
DRV10974 EVM Kit Contents
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Introduction
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Hot surface. Contact may cause burns. Do not touch!
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DRV10974 Evaluation Module
Figure 1. DRV10974 EVM
WARNING
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Power On Power Off
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3 Quick Start Guide
The DRV10974 EVM requires a VCCpower supply source, which has a recommended operating range
from 4.4 V to 18 V. Use the following sequence to power up the EVM:
Figure 2. DRV10974 EVM With Various Connections and User Interface
1. Connect the power supply ground to pin 2 (GND) and a voltage between 4.4 V and 18 V to pin 1 of
connector P1 (Power In). Set the current limit on the power supply to 1.5 A and make sure switch S1 is
in the Off (Up) position as shown in Figure 2.
2. Use the default ADV, RMP, and CS resistor values (or set them up in Section 7).
3. Determine whether to use an analog voltage or PWM to control the speed of the motor.
• For using an analog voltage to control the speed: match the jumpers as shown in Figure 3 and use
the potentiometer (R5) to control the speed.
• For using a PWM signal to control the speed: match the jumpers as shown in Figure 4 and connect
the PWM signal to the PWMIN test point.
4. Power up the board and turn the switch S1 to the On (Down) position.
Quick Start Guide
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Quick Start Guide
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Figure 3. Jumper Configurations for Controlling Speed With Analog Voltage
Figure 4. Jumper Configurations for Controlling Speed With PWM Signal
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4 DRV10974 Onboard Connections
4.1 Connector (P1) for Power Input
The DRV10974 device requires an external power supply (4.4 V to 18 V) to operate. Connector P1
provides the required interface for the external power supply. The pin assignment of terminal P1 is as
follows:
DRV10974 Onboard Connections
Figure 5. Power Input Terminal Block (P1)
Table 1. Connector P1: 2-Terminal Connector to
Connect Power
TERMINAL DESCRIPTION
(1)
1
2 GND
(1)
Note that terminal 1 is denoted by the small, silkscreened rectangle
on the board at the right side of the terminal block.
V
CC
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