STMicroelectronics EVAL6208Q

Overview

EVAL6208Q from STMicroelectronics is an evaluation board for the L6208Q stepper motor driver IC, designed to validate phase current control, decay mode selection, and step/direction sequencing in bipolar stepper systems. It supports 8–52 V supply, delivers up to 2.5 A_r.m.s. per phase, features 3.3 V/5 V logic compatibility, and interfaces directly with STEVAL-PCC009V2 and PractiSPIN™ 2 software for real-time tuning.

For engineers reviewing the EVAL6208Q datasheet, EVAL6208Q pinout, EVAL6208Q application, or EVAL6208Q equivalent, this board enables rapid functional validation of L6208Q-based motion control designs-particularly for current regulation accuracy, thermal performance under PWM switching up to 100 kHz, and fault reporting via EN output.

Technical Context

The board implements the L6208Q QFN7x7-48 IC in a fully populated, thermally optimized layout with dual-phase H-bridge outputs, external sense resistors (0.4 Ω), and adjustable t_OFF timing via R12/R13 trimmers. It provides analog VREF inputs (J2 pins 11–12) for precise current setpoint control and digital logic interface (CLOCK, DIR, CONTROL, ENABLE, HALF/FULL, RESET) mapped to a 30-pin IDC header.

Thermal design includes copper pour on inner layers 2 and 3, bottom-layer heatsinking, and 17 °C/W junction-to-ambient resistance for sustained 2.5 A_r.m.s. operation. Fault signaling is routed to J2 pin 29 (EN output), and board identification (ID0/ID1) is provided via analog outputs on pins 24–25.

Key Specifications

Availability

EVAL6208Q is available at Aetrix Electronics and suitable for stepper motor control validation, motion system prototyping, and PractiSPIN™ 2 software integration requiring stable component supply and documented reference hardware.

Supply support for EVAL6208Q 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 ICs, sensors, and automotive-grade solutions with vertical manufacturing and broad industrial IP.

The EVAL6208Q belongs to ST's motor control evaluation platform family, engineered to accelerate development of precision open-loop and closed-loop stepper systems using their L6x series drivers.

FAQ

What software is required to operate EVAL6208Q?

EVAL6208Q requires ST's PractiSPIN™ 2 evaluation software, which communicates with the board via the STEVAL-PCC009V2 demonstration board. The software provides real-time adjustment of current setpoints, decay modes, step rates, and diagnostic readouts including fault status and thermal warnings.

Can EVAL6208Q drive unipolar stepper motors?

No. EVAL6208Q is configured exclusively for bipolar stepper motors using the L6208Q's dual H-bridge architecture. It lacks the center-tap switching and phase-splitting circuitry required for unipolar motor control and does not support 5-lead or 6-lead unipolar configurations.

Is external current sensing needed when using EVAL6208Q?

No. The board integrates four 0.4 Ω, 1 W sense resistors (R14–R17) - two per phase - directly in the L6208Q's current-sense path. These are factory-calibrated and matched to support accurate r.m.s. current measurement without additional components or PCB layout changes.

Does EVAL6208Q include onboard microcontroller or firmware?

No. EVAL6208Q is a pure hardware interface board with no embedded processor, memory, or firmware. All control signals (CLOCK, DIR, ENABLE, etc.) must be supplied externally - typically from an MCU, FPGA, or STEVAL-PCC009V2 - and no onboard code execution or autonomous operation is supported.