Fully integrated microstepping motor driver

The L6474 device, realized in analog mixed signal technology, integrates a dual low RDS(on)DMOS full bridge with all power switches equipped with an accurate on-chip current sensing circuitry suitable for non-dissipative current control and overcurrent protections. Thanks to a new current control, a 1/16 microstepping is achieved through an adaptive decay mode which outperforms traditional implementations.

All data registers, including those used to set analogue values (i.e.: current control value, current protection trip point, deadtime, etc.) are sent through a standard 5 Mbit/s SPI.

A very rich set of protections (thermal, low bus voltage, overcurrent) makes the L6474 device “bullet proof” as required by the most demanding motor control applications.

Key Features

  • Operating voltage: 8 - 45 V
  • 7.0 A output peak current (3.0 Ar.m.s. )
  • Low RDS(on) power MOSFETs
  • Programmable power MOS slew rate
  • Up to 1/16 microstepping
  • Current control with adaptive decay
  • Non-dissipative current sensing
  • SPI interface
  • Low quiescent and standby currents
  • Programmable non-dissipative overcurrent protection on all power MOS
  • Two-level overtemperature protection

Design

Technical Documentation

Product Specifications
Description Version Size
DS8773 DS8773: Fully integrated microstepping motor driver 4.0 950 KB
Application Notes
Description Version Size
AN4290 AN4290: L647x, L648x and powerSTEP01 family communication protocol 2.1 486 KB
AN4158 AN4158: Peak current control with automatic decay adjustment and predictive current control: basics and setup 2.1 983 KB
User Manuals
Description Version Size
UM1771 UM1771: EVAL6474H-DISC: fully integrated microstepping motor driver based on the L6474 and STM32™ 2.0 1 MB
UM2022 UM2022: SPINFamily evaluation tool 1.2 1 MB
Design Notes & Tips
Description Version Size
DT0055 DT0055: Maintaining message synchronization with L647x, L648x, and PowerStep01 devices 1.1 163 KB
DT0056 DT0056: Planning for easy troubleshooting with your L647x, L648x, or PowerStep01 design 2.0 172 KB

Presentations & Training Material

Presentations
Description Version Size
An introduction to electric motors 1.0 2 MB
STEVAL-3DP001V1 - Reference design for FDM 3D printing 1.0 1 MB
STM32 F1 firmware library for easySPIN (L6474) motor driver - quick guide 1.0 382 KB
STSPIN L6474 product presentation 1.0 538 KB

Publications and Collaterals

Flyers
Description Version Size
STEVAL-3DP001V1 - Plug-n-play solution for 3D printers June 2016 1 MB
Selection Guides
Description Version Size
STSPIN motor drivers 05.2016 1 MB
Brochures
Description Version Size
Motor Control Reference Guide 15.10 2 MB
Products and Solutions for Factory Automation and Control 1.0 3 MB

Tools and Software

Development Tools
Ecosystems
Embedded Software
Evaluation Tools
Software Development Tools
STM32 Open Development Environment
MCUs Embedded Software
Solution Evaluation Tools
Support & Community



Sample & Buy

Part Number Marketing Status Quantity Unit Price (US$) * Package Packing Type Operating Temperature (°C) (min) Operating Temperature (°C) (max) ECCN (EU) ECCN (US) Country of Origin More info Order from ST Order from Distributors
L6474H Active 1000 2.5 HTSSOP28 Tube -40 150 NEC EAR99 MALAYSIA MORE INFO DISTRIBUTOR AVAILABILITY
L6474PDTR Active 1000 2.851 PowerSO 36 Tape And Reel -40 150 NEC EAR99 ITALY MORE INFO DISTRIBUTOR AVAILABILITY
L6474HTR Active 1000 2.5 HTSSOP28 Tape And Reel -40 150 NEC EAR99 MALAYSIA MORE INFO DISTRIBUTOR AVAILABILITY
L6474PD Active 1000 2.851 PowerSO 36 Tube -40 150 NEC EAR99 ITALY MORE INFO DISTRIBUTOR AVAILABILITY
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(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors

Quality & Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
L6474H ActiveHTSSOP28IndustrialEcopack2 0 0
L6474PDTR ActivePowerSO 36IndustrialEcopack1 0 0
L6474HTR ActiveHTSSOP28IndustrialEcopack2 0 0
L6474PD ActivePowerSO 36IndustrialEcopack1 0 0
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(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.

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