STMicroelectronics EVAL6472PD

Overview

EVAL6472PD from STMicroelectronics is an evaluation board for the L6472 fully integrated microstepping motor driver IC, designed to drive two-phase bipolar stepper motors with up to 1/16 microstepping resolution. It supports 8–45 V supply voltage, delivers 7.0 A peak (3.0 A r.m.s.) output current, and features SPI interface, programmable speed profiles, adaptive decay current control, and non-dissipative overcurrent protection - enabling rapid prototyping of precision motion control in lab and bench environments.

For engineers reviewing the EVAL6472PD datasheet, EVAL6472PD pinout, EVAL6472PD application, or EVAL6472PD equivalent, this board provides full access to the L6472's motion command set (Run, Move, GoTo, GoUntil), real-time status monitoring via STATUS register, configurable slew rate and decay modes, and hardware-level thermal/overcurrent/UVLO protections - critical for validating closed-loop positioning, acceleration profiling, and fault recovery behavior before system integration.

Technical Context

The EVAL6472PD implements the L6472 IC in POWERSO36 package and interfaces directly to a host microcontroller via 5-Mbit/s SPI, supporting all 32-bit register read/write operations and application commands (e.g., Run, Move, SoftStop). It exposes all critical control and feedback signals including BUSY/SYNC, FLAG, SW, and OSCIN/OSCOUT for timing synchronization and external switch integration.

Board-level design includes input bulk capacitance, gate-drive charge pump circuitry, dual H-bridge power stage layout optimized for thermal dissipation, and jumper-selectable configuration for step mode, current sense gain, and alarm enable settings - enabling direct validation of predictive current control, adaptive decay tuning, and absolute position counter functionality per the L6472 datasheet.

Key Specifications

Availability

EVAL6472PD is available at Aetrix Electronics and suitable for motion control development, industrial automation prototyping, and medical device actuator validation requiring stable component supply and traceable evaluation hardware.

Supply support for EVAL6472PD 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 specializing in power management, motion control, and embedded processing solutions for industrial, automotive, and consumer applications.

The EVAL6472PD belongs to ST's motor control evaluation platform family, engineered to accelerate adoption of intelligent, highly integrated stepper drivers like the L6472 by providing production-representative signal integrity, thermal layout, and firmware-ready SPI interface.

FAQ

Does EVAL6472PD support both HTSSOP28 and POWERSO36 versions of the L6472?

No. EVAL6472PD is specifically designed for the L6472PD variant in POWERSO36 package. It does not support the HTSSOP28-based L6472H or L6472HTR due to incompatible pinout, thermal pad layout, and power routing. Separate evaluation boards (e.g., EVAL6472H) are required for HTSSOP28 variants.

Can EVAL6472PD operate standalone without a host MCU?

No. The board lacks onboard microcontroller or firmware; it requires an external SPI master (e.g., STM32 Nucleo, Arduino, or custom host) to issue motion commands (Run, Move, GoTo), configure registers (STEP_MODE, TVAL_RUN), and read status (STATUS, ABS_POS). No autonomous operation is supported.

What is the maximum motor inductance supported by EVAL6472PD at 45 V?

At 45 V supply and 1/16 microstepping, the L6472 on EVAL6472PD supports bipolar stepper motors with phase inductance up to 25 mH - confirmed by datasheet Section 7.2 (adaptive decay tuning) and typical application values in Table 7, assuming 3.0 A r.m.s. current setting and 20 kHz switching frequency.

Is the BUSY/SYNC pin on EVAL6472PD configurable for daisy-chaining multiple L6472 devices?

Yes. The BUSY/SYNC pin is routed to a header and can be configured as SYNC output (via CONFIG register bit 12) to synchronize PWM timing across multiple L6472 drivers - verified in Section 6.17.2 of the datasheet and demonstrated in multi-axis motion control reference designs.