Unipolar Stepper Motor

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In unipolar stepper motors, stator windings share a common terminal; the free terminal of each winding is connected to a separate power switch and the current is allowed to flow in one direction through the motor windings. Diodes are used to clamp the voltage across the switches at turn-off. ST’s portfolio features a wide selection of power MOSFETs, diodes and microcontrollers to build a discrete implementation of a unipolar stepper motor driver.

MOSFET and IGBT Drivers

STripFET F7 series

DC-DC Converters

Amplifiers and Comparators

Combining the X-NUCLEO-IHM01A1 (expansion board based on the L6474) with the NUCLEO-F030R8, (for istance) the user can evaluate a stepper motor drive. It provides an affordable and easy-to-use solution for motor control driving for stepper motors.

Solution Components

Part Number

Description

Status

Core Products

Price (US$)*

Order / Download

X-NUCLEO-IHM01A1

Key features

Voltage range from 8 V to 45 V
Phase current up to 3 A_r.m.s.
Power OK and fault LEDs
Advanced current control
Fully protected power stage
Up to 1/16 microstepping resolution
Compatible with Arduino UNO R3 connector
Compatible with STM32 Nucleo boards
Suitable for multi-motor solutions
RoHS compliant

IMAGE

FEATURED RESOURCES

schematics bill of materials gerber

Stepper motor driver expansion board based on L6474 for STM32 Nucleo

L6474PD

12.25

Buy now

NUCLEO-F030R8

Key features

Common features
- STM32 microcontroller in LQFP64 package
- 1 user LED shared with Arduino™
- 1 user and 1 reset push-buttons
- 32.768 kHz crystal oscillator
- Board connectors:Arduino™ Uno V3 expansion connectorST morpho extension pin headers for full access to all STM32 I/Os
- Flexible power-supply options: ST-LINK, USB V_BUS or external sources
- On-board ST-LINK debugger/programmer with USB re-enumeration capability: mass storage, Virtual COM port and debug port
- Comprehensive free software libraries and examples available with the STM32Cube MCU Package
- Support of a wide choice of Integrated Development Environments (IDEs) including IAR™, Keil^® and GCC-based IDEs
Board-specific features
- External SMPS to generate V_core logic supply
- 24 MHz HSE
- Board connectors:External SMPS experimentation dedicated connectorMicro-AB or Mini-AB USB connector for the ST-LINKMIPI^® debug connector
- Arm^® Mbed Enabled™ compliant

IMAGE

FEATURED RESOURCES

schematics bill of materials gerber

STM32 Nucleo-64 development board with STM32F030R8 MCU, supports Arduino and ST morpho connectivity

STM32F030R8

10.12

Buy now

X-CUBE-SPN1

Key features

Driver layer for complete management of the L6474 microstepping motor driver integrated in the X-NUCLEO-IHM01A1 expansion board
Examples for controlling up to three stepper motors
Easy portability across different MCU families, thanks to STM32Cube
Free, user-friendly license terms

IMAGE

Stepper motor driver software expansion for STM32Cube

Software

Part Number	General Description	Software Version	Supplier	GitHub link	Download
X-CUBE-SPN1	Stepper motor driver software expansion for STM32Cube	1.10.0	ST	-	Get Software

X-NUCLEO-IHM01A1

Description:

Stepper motor driver expansion board based on L6474 for STM32 Nucleo

Quick view

Price (US$)*

12.25

Key features

Voltage range from 8 V to 45 V
Phase current up to 3 A_r.m.s.
Power OK and fault LEDs
Advanced current control
Fully protected power stage
Up to 1/16 microstepping resolution
Compatible with Arduino UNO R3 connector
Compatible with STM32 Nucleo boards
Suitable for multi-motor solutions
RoHS compliant

IMAGE

FEATURED RESOURCES

schematics bill of materials gerber

NUCLEO-F030R8

Description:

STM32 Nucleo-64 development board with STM32F030R8 MCU, supports Arduino and ST morpho connectivity

Quick view

Price (US$)*

10.12

Key features

Common features
- STM32 microcontroller in LQFP64 package
- 1 user LED shared with Arduino™
- 1 user and 1 reset push-buttons
- 32.768 kHz crystal oscillator
- Board connectors:Arduino™ Uno V3 expansion connectorST morpho extension pin headers for full access to all STM32 I/Os
- Flexible power-supply options: ST-LINK, USB V_BUS or external sources
- On-board ST-LINK debugger/programmer with USB re-enumeration capability: mass storage, Virtual COM port and debug port
- Comprehensive free software libraries and examples available with the STM32Cube MCU Package
- Support of a wide choice of Integrated Development Environments (IDEs) including IAR™, Keil^® and GCC-based IDEs
Board-specific features
- External SMPS to generate V_core logic supply
- 24 MHz HSE
- Board connectors:External SMPS experimentation dedicated connectorMicro-AB or Mini-AB USB connector for the ST-LINKMIPI^® debug connector
- Arm^® Mbed Enabled™ compliant

IMAGE

FEATURED RESOURCES

schematics bill of materials gerber

X-CUBE-SPN1

Description:

Stepper motor driver software expansion for STM32Cube

Quick view

Price (US$)*

Software

Key features

Driver layer for complete management of the L6474 microstepping motor driver integrated in the X-NUCLEO-IHM01A1 expansion board
Examples for controlling up to three stepper motors
Easy portability across different MCU families, thanks to STM32Cube
Free, user-friendly license terms

IMAGE

Part Number	General Description	Software Version	Supplier	GitHub link	Download
X-CUBE-SPN1	Stepper motor driver software expansion for STM32Cube	1.10.0	ST	-	Get Software

Part Number	Description
EVAL6491HB	Demonstration board for L6491 gate driver with smart shut down feature	Quick view Key Features High voltage rail up to 600 V dV/dt immunity: 50 V/ns in full temperature range Driver current capability: 4 A source/sink Comparator for fault protections Smart shutdown function Integrated bootstrap diode Adjustable deadtime Interlocking function Switching times 15 ns rise/fall with 1 nF load 3.3 V, 5 V TTL/CMOS inputs with hysteresis Compact and simplified layout Bill of material reduction Effective fault protection Flexible, easy and fast design Show More Product Details Download databrief IMAGE FEATURED RESOURCES Schematics BOM Gerber
EVAL6393FB	Low voltage full bridge reference design board featuring L6393 advanced high-voltage gate driver	Quick view Key Features ~150 W drive capability (50 V - 3.0 A_r.m.s. ) Very low area occupation, all devices and power switches in SMD package (no heatsink) Fast-decay or slow-decay on-board constant off-time peak current control PWM voltage mode control with overcurrent protection possible via external logic signals Driver supply voltage on-board generation directly from BUS voltage Carefully optimized layout Show More Product Details Download databrief IMAGE FEATURED RESOURCES Schematics BOM Gerber
EVAL6498L	Evaluation board for the L6498L gate driver	Quick view Key Features Driver current capability: 2 A source, 2.5 A sink Integrated bootstrap diode Interlocking function 3.3 V, 5 V TTL/CMOS inputs with hysteresis UVLO on both high-side and low-side sections dV/dt immunity: 50 V/ns in full temperature range Compact and simplified layout Bill of material reduction Flexible, easy and fast design Show More Product Details Download databrief IMAGE FEATURED RESOURCES Schematics BOM Gerber
EVALSTDRV600HB8	Demonstration board kit for L638xE and L639x high-voltage gate drivers	Quick view Key Features Half-bridge configuration High voltage rail up to 600 V Includes samples of each compatible gate driver in SO8 package L6385E, L6387E, L6388E, L6389E, L6395, L6398, L6399 Compatible with MOSFETs/IGBTs in DPAK, D2PAK, TO-220, TO-220FP dV/dt transient immunity ± 50 V/ns in full temperature range Integrated bootstrap diode Dedicated high- and low-side driving inputs Compact and simplified layout Gate drivers in the kit features different functionalities and characteristics UVLO on both - high-side and low-side Internal deadtime, or no deadtime Interlocking for anti cross-conduction protection Ability to drive asymmetrical half-bridges and switched reluctance motors Active high or active low LIN for single input gate driving Show More Product Details Download databrief FEATURED RESOURCES Schematics BOM Gerber
EVALSTGAP1AS	STGAP1AS evaluation board	Quick view Key Features High voltage rail up to 1500 V 5 A sink/source driver current capability 5 A active Miller clamp Gate driving voltage up to 36 V Negative gate driving ability Desaturation detection Overcurrent protection Output 2-level turn-off (2LTO) UVLO on each supply voltage Overtemperature warning and shut-down protection 3.3/5 V logic input interface Optimized reference layout SPI with daisy chain feature for parameters programming and diagnostic Suitable to be used in combination with STEVAL-PCC009V2 and configuration GUI Fault LED indicators RoHS compliant Show More Product Details Download databrief FEATURED RESOURCES Schematics BOM Gerber
EVAL6494L	Demonstration board for L6494L gate driver	Quick view Key Features Driver current capability: 2 A source, 2.5 A sink Integrated bootstrap diode Single input and shutdown pin Adjustable deadtime 3.3 V, 5 V TTL/CMOS inputs with hysteresis UVLO on both high-side and low-side sections dV/dt immunity: 50 V/ns in full temperature range Compact and simplified layout Bill of material reduction Flexible, easy and fast design Show More Product Details Download databrief IMAGE FEATURED RESOURCES Schematics BOM Gerber

Part Number

EVAL6491HB

Demonstration board for L6491 gate driver with smart shut down feature

Quick view

Key Features

High voltage rail up to 600 V
dV/dt immunity: 50 V/ns in full temperature range
Driver current capability: 4 A source/sink
Comparator for fault protections
Smart shutdown function
Integrated bootstrap diode
Adjustable deadtime
Interlocking function
Switching times 15 ns rise/fall with 1 nF load
3.3 V, 5 V TTL/CMOS inputs with hysteresis
Compact and simplified layout
Bill of material reduction
Effective fault protection
Flexible, easy and fast design

Product Details Download databrief

IMAGE

FEATURED RESOURCES

Schematics BOM Gerber

EVAL6393FB

Low voltage full bridge reference design board featuring L6393 advanced high-voltage gate driver

Quick view

Key Features

~150 W drive capability (50 V - 3.0 A_r.m.s. )
Very low area occupation, all devices and power switches in SMD package (no heatsink)
Fast-decay or slow-decay on-board constant off-time peak current control
PWM voltage mode control with overcurrent protection possible via external logic signals
Driver supply voltage on-board generation directly from BUS voltage
Carefully optimized layout

Product Details Download databrief

IMAGE

FEATURED RESOURCES

Schematics BOM Gerber

EVAL6498L

Evaluation board for the L6498L gate driver

Quick view

Key Features

Driver current capability: 2 A source, 2.5 A sink
Integrated bootstrap diode
Interlocking function
3.3 V, 5 V TTL/CMOS inputs with hysteresis
UVLO on both high-side and low-side sections
dV/dt immunity: 50 V/ns in full temperature range
Compact and simplified layout
Bill of material reduction
Flexible, easy and fast design

Product Details Download databrief

IMAGE

FEATURED RESOURCES

Schematics BOM Gerber

EVALSTDRV600HB8

Demonstration board kit for L638xE and L639x high-voltage gate drivers

Quick view

Key Features

Half-bridge configuration
High voltage rail up to 600 V
Includes samples of each compatible gate driver in SO8 package
- L6385E, L6387E, L6388E, L6389E,
- L6395, L6398, L6399
Compatible with MOSFETs/IGBTs in
- DPAK, D2PAK, TO-220, TO-220FP
dV/dt transient immunity ± 50 V/ns in full temperature range
Integrated bootstrap diode
Dedicated high- and low-side driving inputs
Compact and simplified layout
Gate drivers in the kit features different functionalities and characteristics
- UVLO on both - high-side and low-side
- Internal deadtime, or no deadtime
- Interlocking for anti cross-conduction protection
- Ability to drive asymmetrical half-bridges and switched reluctance motors
- Active high or active low LIN for single input gate driving

Product Details Download databrief

FEATURED RESOURCES

Schematics BOM Gerber

EVALSTGAP1AS

STGAP1AS evaluation board

Quick view

Key Features

High voltage rail up to 1500 V
5 A sink/source driver current capability
5 A active Miller clamp
Gate driving voltage up to 36 V
Negative gate driving ability
Desaturation detection
Overcurrent protection
Output 2-level turn-off (2LTO) UVLO on each supply voltage
Overtemperature warning and shut-down protection
3.3/5 V logic input interface
Optimized reference layout
SPI with daisy chain feature for parameters programming and diagnostic
Suitable to be used in combination with STEVAL-PCC009V2 and configuration GUI
Fault LED indicators
RoHS compliant

Product Details Download databrief

FEATURED RESOURCES

Schematics BOM Gerber

EVAL6494L

Demonstration board for L6494L gate driver

Quick view

Key Features

Driver current capability: 2 A source, 2.5 A sink
Integrated bootstrap diode
Single input and shutdown pin
Adjustable deadtime
3.3 V, 5 V TTL/CMOS inputs with hysteresis
UVLO on both high-side and low-side sections
dV/dt immunity: 50 V/ns in full temperature range
Compact and simplified layout
Bill of material reduction
Flexible, easy and fast design

Product Details Download databrief

IMAGE

FEATURED RESOURCES

Schematics BOM Gerber

00 Files selected for download

Technical Documentation

Application Notes

Description	Version	Size	Action
AN1794 PractiSPIN evaluation system configuration and set up guide	2.4	435.2 KB	PDF
AN460 STEPPER MOTOR DRIVE CONSIDERATIONS, COMMON PROBLEMS & SOLUTIONS	1.2	152.52 KB	PDF
AN235 Stepper motor driving	2.2	1.25 MB	PDF