STMicroelectronics EVAL6482H-DISC

Overview

EVAL6482H-DISC from STMicroelectronics is a self-contained development board for the L6482H stepper motor controller IC, enabling rapid evaluation of high-voltage (10.5–85 V), high-current (7.8 A r.m.s. per phase) bipolar stepper motor control with up to 1/16 microstepping, autonomous firmware, and USB/JTAG debug interface.

For engineers reviewing the EVAL6482H-DISC datasheet, EVAL6482H-DISC pinout, EVAL6482H-DISC application, or EVAL6482H-DISC equivalent, this board supports real-time parameter tuning via GUI, embedded motion control logic, hardware-level overtemperature and non-dissipative overcurrent protection, and direct integration with SPIN-family tools.

Technical Context

The board implements the L6482H motor controller in HTSSOP38 package, paired with an STM32F105RBT6 LQFP64 MCU running embedded firmware that handles motion sequencing, current regulation, and decay mode adaptation. It supports both USB-based GUI configuration and standalone operation via onboard pushbuttons and LED status indicators.

Hardware features include dual H-bridge MOSFET drivers (STL30N10F7 PowerFLAT 5×6), 8 MHz crystal oscillator (Y1), 3.3 V LDO (U1), USB ESD protection (U3), and configurable jumpers for boot mode, external switch input, and USB functionality - all designed for immediate plug-and-play evaluation without external host dependencies.

Key Specifications

Availability

EVAL6482H-DISC is available at Aetrix Electronics and suitable for industrial automation prototyping, medical device motion validation, laboratory instrumentation development, and robotics actuator testing requiring stable component supply and long-term tooling support.

Supply support for EVAL6482H-DISC 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, Switzerland, specializing in microcontrollers, power management, analog, MEMS, and automotive-grade ICs with broad industrial and consumer reach.

The EVAL6482H-DISC belongs to ST's SPIN family of motor control evaluation platforms, designed specifically to accelerate adoption of their integrated stepper driver ICs by providing out-of-box firmware, GUI tools, and hardware abstraction for rapid system-level validation.

FAQ

Does EVAL6482H-DISC require external programming hardware to operate?

No. The board contains an embedded STM32F105RBT6 MCU with preloaded firmware, enabling immediate operation using only a USB cable and the provided GUI software. JTAG (J4) is optional and used only for advanced firmware development or customization - not required for basic evaluation.

Can EVAL6482H-DISC drive unipolar stepper motors?

No. The L6482H controller and its associated dual H-bridge driver stage (Q1–Q8) are designed exclusively for bipolar stepper motors. Unipolar motors require different winding configurations and switching topologies not supported by this board's hardware or firmware.

What is the role of R37 and R38 (0.02 Ω, 2512) on the board?

R37 and R38 are precision current-sense resistors placed in the low-side paths of each H-bridge leg. They enable real-time phase current measurement for closed-loop current regulation, overcurrent detection, and adaptive decay control - critical for maintaining torque consistency and protecting MOSFETs during stall or overload.

Is external resonator or crystal required for operation?

No. The board includes Y1, an 8 MHz HC49/US-SM crystal (20 pF load, ±30 ppm), which serves as the primary clock source for the L6482H and STM32 MCU. The "footprint for external resonator or crystal" noted in features refers to optional replacement - not a requirement.