STMicroelectronics EVAL6482H

Overview

EVAL6482H from STMicroelectronics is an evaluation board for the L6482 microstepping motor controller IC, designed to drive two-phase bipolar stepper motors with up to 1/16 microstepping resolution. It features a dual full-bridge gate driver for N-channel MOSFETs, SPI interface (5 Mbit/s), programmable motion profiles, and integrated protections including overcurrent, thermal shutdown, and undervoltage lockout. The board enables rapid validation of motion control algorithms in industrial automation positioning systems.

For engineers reviewing the EVAL6482H datasheet, EVAL6482H pinout, EVAL6482H application, or EVAL6482H equivalent, this board supports full functional evaluation of the L6482's embedded motion engine, adaptive decay current control, absolute position tracking, and non-dissipative overcurrent protection - all accessible via standard SPI commands and configurable through dedicated registers.

Technical Context

The EVAL6482H implements the complete signal and power path for the L6482 IC, including external gate drive circuitry, charge pump, current sense amplifiers, and motor phase connections. It provides access to all 38 pins of the HTSSOP38-packaged L6482, with dedicated test points for BUSY/SYNC, FLAG, SW, and analog monitoring (e.g., ADC_OUT, VREF).

It supports the full operating voltage range (7.5 V–85 V) and enables real-time tuning of key parameters: TVAL_HOLD/RUN/ACC/DEC for torque regulation, STEP_MODE for microstep resolution (full/half/quarter/1/8/1/16), and GATECFG1/GATECFG2 for gate drive strength and deadtime configuration.

Key Specifications

Availability

EVAL6482H is available at Aetrix Electronics and suitable for industrial motion control prototyping, automated test equipment development, and precision positioning system validation requiring stable component supply and full-feature evaluation capability.

Supply support for EVAL6482H 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, motor control, and embedded solutions for industrial, automotive, and consumer applications.

The EVAL6482H belongs to ST's motor control evaluation platform family, developed to accelerate adoption of intelligent, fully integrated stepper drivers like the L6482 - targeting compact, high-precision motion systems where microstepping accuracy, thermal robustness, and SPI-based configurability are critical.

FAQ

Does EVAL6482H include the L6482 IC pre-mounted?

Yes, the EVAL6482H board ships with the L6482H IC (HTSSOP38 package) factory-mounted and fully soldered. No additional assembly is required to begin evaluation. All supporting components - including gate resistors, current sense shunts, decoupling capacitors, and charge pump circuitry - are included and optimized per ST's reference design guidelines.

Can EVAL6482H drive NEMA 23 or larger stepper motors?

EVAL6482H supports motors rated up to 85 V and 4.5 A peak phase current (dependent on heatsinking and PCB layout). With appropriate external N-channel MOSFETs and thermal management, it can drive NEMA 23 motors in typical industrial configurations. Motor current capability is limited by the L6482's gate driver output and external FET selection - not the evaluation board itself.

Is firmware or GUI software provided with EVAL6482H?

Yes, ST provides the X-NUCLEO-IHM03A1-compatible STM32 Motor Control SDK and STSW-L6482GUI - a Windows-based graphical user interface that communicates with EVAL6482H via USB-to-SPI bridge (requires ST-LINK/V2-1 or similar). The GUI enables real-time register read/write, motion profile generation, and status monitoring without custom code.

What external hardware is needed to operate EVAL6482H?

A 7.5–85 V DC power supply for the motor bus (VS), a 5 V supply for logic (VCC), an SPI host (e.g., PC with ST-LINK/V2-1 + GUI, or MCU development board), and a two-phase bipolar stepper motor. Optional: oscilloscope for phase current/voltage analysis, and heatsink if operating above 2 A continuous per phase.