STMicroelectronics EVL6472

Overview

EVL6472 from STMicroelectronics is a stepper motor driver evaluation board based on the L6472 IC, designed for rapid prototyping of two-phase bipolar stepper motor control. It supports 8–45 V supply, delivers up to 3 A_r.m.s. phase current, enables 1/16 microstepping via adaptive decay mode, and features Power OK/fault LEDs and Arduino® UNO R3 connector compatibility for multi-motor stacking.

For engineers reviewing the EVL6472 datasheet, EVL6472 pinout, EVL6472 application, or EVL6472 equivalent, this board provides verified SPI-controlled motion profiling (acceleration, target position, speed), integrated thermal/overcurrent/UVLO protection, and hardware-ready interface mapping to Arduino-compatible headers and L6472 register-level control.

Technical Context

The EVL6472 implements the L6472's digital motion engine with SPI-based command interface (5 Mbit/s), enabling user-defined trapezoidal motion profiles through acceleration, deceleration, speed, and absolute position registers. Its analog mixed-signal architecture integrates dual DMOS full-bridges with on-chip current sensing for non-dissipative current regulation.

Board-level design includes dedicated VS/VDD power domains, bootstrapping circuitry (VBOOT), flag/busy_sync status signaling, and three chip-select lines (CS_1–CS_3) supporting up to three stacked EVL6472 boards - each independently addressable over shared SPI bus.

Key Specifications

Availability

EVL6472 is available at Aetrix Electronics and suitable for industrial automation prototyping, CNC motion control validation, and robotics actuator development requiring stable component supply and rapid hardware iteration.

Supply support for EVL6472 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, designing and manufacturing microcontrollers, power ICs, sensors, and analog/mixed-signal solutions for industrial, automotive, and consumer applications.

The EVL6472 belongs to ST's motor control evaluation platform family, engineered to accelerate adoption of their intelligent driver ICs - specifically targeting developers needing validated, Arduino-compatible hardware for precise stepper positioning without custom PCB design.

FAQ

Does EVL6472 require external current sense resistors?

No. The L6472 IC on EVL6472 uses on-chip current sensing via its ADCIN pin and internal MOSFET R_ds(on) monitoring, eliminating need for external shunt resistors. This reduces board area and improves thermal performance while maintaining ±5% current accuracy across temperature.

Can EVL6472 drive unipolar stepper motors?

No. EVL6472 is designed exclusively for two-phase bipolar stepper motors, as confirmed by its H-bridge topology (OUT1A/OUT1B/OUT2A/OUT2B), lack of center-tap routing, and register map optimized for bipolar commutation sequences.

What is the function of the BUSY_SYNC pin on EVL6472?

BUSY_SYNC is an open-drain output that asserts low during motion execution or register write cycles, synchronizing host MCU timing. It allows precise coordination of multi-axis moves and prevents premature command issuance before internal state machine completion.

Is Arduino IDE support provided out-of-the-box for EVL6472?

Yes. ST provides official Arduino libraries (e.g., X-NUCLEO-IHM03A1-compatible drivers) and example sketches for motion control, register configuration, and fault handling - tested with Arduino UNO R3 and compatible with STM32 Nucleo boards using same pinout mapping.