STMicroelectronics EVL6470

Overview

EVL6470 from STMicroelectronics is a stepper motor driver evaluation board based on the L6470 IC, designed for rapid prototyping of two-phase bipolar stepper motor control systems. It supports 8–45 V supply, delivers up to 3 A_r.m.s. phase current, enables true 1/128 microstepping, and integrates power OK/fault LEDs and SPI-based motion profile programming (5 Mbit/s).

For engineers reviewing the EVL6470 datasheet, EVL6470 pinout, EVL6470 application, or EVL6470 equivalent, this board provides Arduino® UNO R3 connector compatibility, stackable multi-motor expansion (up to three motors), and full protection coverage including thermal, overcurrent, low bus voltage, and stall detection.

Technical Context

The EVL6470 implements voltage-mode driving using the L6470's integrated dual DMOS full-bridge power stage with on-chip current sensing for non-dissipative current regulation. Its digital control core executes user-defined motion profiles-acceleration, deceleration, speed, and target position-via dedicated SPI-accessible registers.

All analog configuration parameters-including current control value, overcurrent trip point, dead time, and PWM frequency-are programmable through the same 5 Mbit/s SPI interface. The board routes critical signals (FLAG, BUSY_SYNC, STBY_RES, CK, SDI, SDO, CS_1–CS_3) to enable synchronized multi-board operation and real-time status monitoring.

Key Specifications

Availability

EVL6470 is available at Aetrix Electronics and suitable for industrial automation prototyping, laboratory motion control validation, and embedded robotics development requiring stable component supply and rapid hardware iteration.

Supply support for EVL6470 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 management ICs, sensors, and motor control solutions for industrial, automotive, and consumer markets.

The EVL6470 belongs to ST's motor control evaluation platform family, engineered to accelerate development of precise, protected, and SPI-programmable stepper motor systems for cost-sensitive and space-constrained applications.

FAQ

What microcontroller interfaces are supported by the EVL6470?

The EVL6470 uses a standard 5 Mbit/s SPI interface for all communication with host controllers. It is natively compatible with Arduino® UNO R3 via its R3 footprint and supports direct connection to STM32, ESP32, and other SPI-capable MCUs using the exposed SDI, SDO, CK, and CS pins. No I²C or UART bridging is required.

Can multiple EVL6470 boards be used together on one system?

Yes-EVL6470 supports stacking via its Arduino R3-compatible header and includes three independent chip select lines (CS_1, CS_2, CS_3) to control up to three boards on a single SPI bus. The BUSY_SYNC and FLAG signals allow synchronized motion execution and coordinated fault reporting across stacked units.

Does the EVL6470 require external current-sense resistors?

No-the L6470 IC on the EVL6470 integrates accurate on-chip current sensing, eliminating external sense resistors. Current regulation and overcurrent protection are implemented internally using the device's proprietary non-dissipative sensing architecture, reducing BOM count and PCB area.

What protections does the EVL6470 provide during motor stall conditions?

The EVL6470 detects motor stall via the L6470's built-in stall detection algorithm, which monitors back-EMF and current response anomalies. Upon stall, it asserts the FLAG pin, halts motion, and triggers the red fault LED. This occurs without firmware intervention and is fully hardware-automated within the L6470 silicon.