STMicroelectronics EVSPIN948 Dual Brushed DC Motor Driver Evaluation Board User Manual

STMicroelectronics EVSPIN948 Dual Brushed DC Motor Driver Evaluation

Board

Product Usage Instructions

Getting Started

1. Check the setting of the jumpers based on your configuration as
   described in Section 3 Hardware Description and Configuration

2. Connect the board with the STM32 Nucleo board through the Arduino UNO R3

3. Supply the board through the input 2 (VS) and 1 (ground) of the connector CN1

Hardware Description and Configuration

The EVSPIN948 can drive up to 2 DC motors simultaneously. The driving mode selection is done by setting J5 and J6 jumpers connected to MODE1 and MODE2 pins of the device on top of the board.

Driving Mode Selection

4.5 Arms

FAQ

Q: What should I do if the components on the board reach hazardous temperatures during operation?

A: If the components reach hazardous temperatures, immediately stop using the board and allow it to cool down before handling it. Ensure no flammable materials are nearby.

Q: How do I connect the EVSPIN948 board with the STM32 Nucleo board?

A: Connect the two boards through the Arduino UNO R3 connector by following the provided instructions in the user manual.

Introduction

• The EVSPIN948 dual-brushed DC motor driver evaluation board is based on the STSPIN948.
• It provides an affordable and easy-to-use solution for the implementation of brushed DC motor driving applications. Thanks to the parallel operation, it can be easily converted to a single brushed DC motor driver with double current capability.
• In addition to the internal current limiters, the integrated amplifiers allow it to be used in systems with external current control. The EVSPIN948 is compatible with the Arduino UNO R3 connector and most STM32 Nucleo boards.

Safety precautions

Warning: Some of the components mounted on the board could reach hazardous temperatures during operation.

While using the board, please follow the following precautions:

• Do not touch the components or the heatsink.
• Do not cover the board.
• Do not put the board in contact with flammable materials or with materials releasing smoke when heated.
• After operation, allow the board to cool down before touching it.

Getting started

The main features of the EVSPIN948 evaluation board are:

• Voltage range from 5 V to 58 V
• Phase current up to 4.5 A r.m.s for each motor
• Adjustable output slew rate
• Five different driving modes
• Two independent current limiters with adjustable off-time
• Two integrated amplifiers with fixed gain
• Full protection set including overcurrent, undervoltage lockout, and thermal shutdown
• Compatibility with Arduino UNO R3 connector and STM32 Nucleo boards
• The EVSPIN948 board is ready to be used in a few steps.

Follow this procedure to start your evaluation:

1. Check the setting of the jumpers based on your configuration as described in Section 3 Hardware description and configuration
2. Connect the board with the STM32 Nucleo board through the Arduino UNO R3
3. Supply the board through the input 2 (VS) and 1 (ground) of the connector CN1

Further support material is available on the STSPIN948 product page at www.st.com

Hardware description and configuration

The following tables provide the detailed pinout of the Arduino UNO R3 and ST Morpho connectors.

Table 1. Arduino UNO R3 connector table

• All non-listed pins are not connected.

Driving mode selection

• The EVSPIN948 can drive up to 2 DC motors at the same time.
• The driving mode selection is done by setting J5 and J6 jumpers (connected to MODE1 and MODE2 pins of the device) on the top of the boards.

The table below briefly summarizes the possible configurations:

J5| J6| Driving mode| Typical application| Max output current (each motor)| Output R DS(ON)| Minimum OCD

threshold

---|---|---|---|---|---|---
1-2| 1-2| Reserved
1-2| 2-3| Dual full bridge| 2 x bidirectional brushed DC (Figure 3)| 4.5 Arms| 0.4 Ω| 7 A
2-3| 1-2| Dual half-bridge| 2 x high current unidirectional brushed DC(1) (Figure 4)| 9 Arms| 0.2 Ω| 14 A
1 x high current bidirectional brushed DC (Figure 5)| 0.4 Ω
2-3(2)| 2-3(2)| Dual full bridge with mixed decay| 2 x bidirectional brushed DC or Bipolar stepper (Figure 3)| 4.5 Arms| 0.4 Ω| 7 A

1. The motors can be connected between OUT and either VS (like in the figure) or GND. In the latter case, the current limiter must be disabled.
   • Motors can also be connected between OUT and LSS (without the need to disable the current limiter), soldering one of the motor cables directly to R12 or R13.
2. This configuration is only available with the current limiter in Fixed OFF time mode (see Section 3.2)

Current limiter mode

The behavior of the current limiter can be changed by setting the J7 jumper (connected to MODE3 of the device) as follows:

Table 2. Current limiter mode settings

In Fixed OFF time mode, the current limiter A and current limiter B can be disabled by setting R6 and R7 to their minimum value respectively.

The current threshold can be set in two different ways:

• Trimming R41 and R46 resistors, leaving CN9.3 and CN8.4 floating
• Applying a square wave with variable duty cycle to CN9.3 and CN8.4, setting R41 and R46 to their minimum value

Output slew rate

The output slew rate can be increased by moving the rotative switch SW1 clockwise. With the STSPIN948 device, the slew rate value can be chosen from four different values, as shown in Table 3.

Table 3. Slew rate settings

Thermal performance

An example of the thermal performance of the EVSPIN948 is provided in Figure 7. The board is used in full-bridge and parallel half-bridge configurations in a typical application to drive an inductive load with different output currents ranging from 0.5 A to 3 A.

Set-up conditions:

• Planar orientation of the board and natural convection only
• Tambient = 25 °C
• PWM frequency = 20 KHz
• VS = 30 V
• Output slew rate setting = 2 V/ns

Bills of material

Table 4. EVSPIN948 bill of material

Item| Qty.| Ref.| Description| Part/Value| Manufact.| Order code
---|---|---|---|---|---|---
1| 1| CN1| Connector 5.08 mm close vertical| MORSV-508-2P_screw| Wurth Elektronik| 691312510002 or equivalent
2| 1| CN2| Connector 5.08 mm close vertical| MORSV-508-4P_screw| Wurth Elektronik| 691312510004 or equivalent
3| 1| CN5| Connector through-hole-pitch 2.54| CON-1×10| Samtec| SSQ-110-04-F-S
4| 2| CN6,CN9| Connector through-hole-pitch 2.54| CON-1×8| Samtec| SSQ-108-04-F-S
5| 2| CN7,CN10| Connector through-hole-pitch 2.54| N.M.| Samtec| ESQ-119-24-G-D
6| 1| CN8| Connector through-hole-pitch 2.54| CON-1×6| Samtec| SSQ-106-04-F-S
7| 3| C1,C15,C16| SMT ceramic capacitor| 100 n 15 V|  |
8| 1| C2| SMT ceramic capacitor| 1 u 15 V|  |
9| 2| C3,C4| Through-hole aluminum elect. capacitor| 220 u 100 V| Panasonic| EEUFS2A221B
10| 1| C5| SMT ceramic capacitor| 220 n 15 V|  |
11| 3| C6,C7,C8| SMT ceramic capacitor| 1 n 15 V|  |
12| 2| C9,C10| SMT ceramic capacitor| 100 p 15 V|  |
13| 2| C11,C12| SMT ceramic capacitor| 10 n 15 V|  |
14| 2| C17,C18| SMT ceramic capacitor| 470 n 100 V|  |
15| 1| C19| SMT ceramic capacitor| 100 n 100 V|  |
16| 4| D1,D2,D3,D4| Yellow LED| Yellow|  |
17| 2| D5,D6| Red LED| Red|  |
18| 1| SW1| Rotative switch x4| ROT-SWITCH| Nidec| CS-4-14-NTB or equivalent
19| 2| J2,J3| Header connector 1×2 pins| Closed|  |
20| 3| J5,J6,J7| Header connector 1×3 pins| Closed 1-2|  |
21| 2| Q1,Q2,Q3,Q4| P MOSFET| MOSFET P| NXP| NX3008PBKW
22| 1| R1| SMT resistor| 22 k 1/10 W|  |
23| 3| R2,R24,R31| SMT resistor| 1 k 1/10 W|  |
24| 1| R3| SMT resistor| 2.2 k 1/10 W|  |
25| 1| R4| SMT resistor| 5.6 k 1/10 W|  |
26| 3| R5,R44,R49| SMT resistor| 10 k 1/10 W|  |
27| 2| R6,R7| 1/4″ square trimpot trimming potentiometer, top adjust| 500 k| Bourns| 3266W-1-504 LF
28| 4| R8,R9| SMT resistor| 4.7 k 1/10 W|  |
29| 4| R12,R13,R14, R15| SMT resistor| 0.05 1% 3 W| Bourns| CRA2512-FZ-R050ELF
30| 4| R16,R17,R18, R19| SMT resistor| 10 k 1/2 W|  |
31| 2| R20,R22| SMT resistor| 39 k 1/10 W|  |
32| 4| R21,R23,R42, R47| SMT resistor| 330 R 1/10 W|  |
33| 14| R25,R26,R27, R28,R29,R30, R32,R33,R34, R35,R36,R37,

R38,R39

| **** SMT resistor| 0 R 1/10 W|  |
34| 2| R40,R45| SMT resistor| 47 k 1/10 W|  |
35| 2| R41,R46| 1/4″ square trimpot trimming potentiometer, top adjust| 1 k| Bourns| 3266W-1-102 LF

Schematic diagrams

Revision history

Table 5. Document revision history

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