ST EVL6470 User Manual

UM3312
User manual
Stepper motor driver evaluation board based on the L6470
Introduction
The EVL6470 is a stepper motor driver evaluation board based on the L6470.
It provides an affordable and easy-to-use solution to drive a stepper motor in your application.
The L6470 device, created using analog mixed signal technology, is an advanced, fully integrated, solution suitable for driving
two-phase bipolar stepper motors with microstepping. It integrates a dual low R DMOS full bridge with an accurate on-chip
dsON
current sensing circuitry suitable for non-dissipative current control and overcurrent protection. Thanks to a unique control
system, a true 1/128 step resolution is achieved. The digital control core can generate user-defined motion profiles with
acceleration, deceleration, speed, or target position, which are easily programmed through a dedicated set of registers. All
commands and data registers, including those used to set analog values (that is: current control value, current protection trip
point, dead time, PWM frequency, etc.) are sent through a standard 5-Mbit/s SPI. A complete set of protections (thermal, low
bus voltage, overcurrent, and motor stall) makes the L6470 device fully protected, as required by the most demanding motor
control applications.
The EVL6470 is compatible with the Arduino® UNO R3 connector and supports the addition of other boards, which can be
stacked to drive up to three stepper motors.
Figure 1. EVL6470 board
UM3312 - Rev 1 - March 2024
www.st.com
For further information contact your local STMicroelectronics sales office.