STMicroelectronics STEVAL-IHM025V1

Overview

STEVAL-IHM025V1 from STMicroelectronics is a fully populated 1 kW, 3-phase AC-DC inverter demonstration board built around the STGIPL14K60 IGBT intelligent power module in SDIP-38L package. It delivers sinusoidal or six-step PWM waveforms for sensor-based and sensorless control of PMSM and induction motors up to 1000 W, supports 90–285 VAC / 125–400 VDC input, and integrates regenerative braking, three-shunt or single-shunt current sensing, and hall/encoder/tachometer interfaces.

For engineers reviewing the STEVAL-IHM025V1 datasheet, STEVAL-IHM025V1 pinout, STEVAL-IHM025V1 application, or STEVAL-IHM025V1 equivalent, this board serves as a validated hardware platform for field-oriented control (FOC) firmware development, motor drive topology evaluation, and STM32-based motor control system integration - especially where compact inverter design, thermal management, and analog signal conditioning fidelity are critical.

Technical Context

The board implements a complete motor control system architecture comprising four functional blocks: a user-supplied control block (e.g., STM3210B-EVAL), a +15 V buck converter power supply based on VIPer16L operating at 60 kHz, a 3-phase inverter power block centered on STGIPL14K60 with integrated gate drivers and op-amps, and a motor interface supporting PMSM and asynchronous motors.

Current sensing uses configurable shunt amplification networks (single-shunt or three-shunt) with gain settings defined by jumper positions (W1–W3), while overcurrent protection leverages STGIPL14K60's internal comparators tied directly to shutdown logic. Regenerative braking engages a hardware-controlled dummy load when DC bus voltage exceeds 445 VDC and disengages below 420 VDC.

Key Specifications

Availability

STEVAL-IHM025V1 is available at Aetrix Electronics and suitable for motor control reference design validation, STM32 FOC firmware integration, and industrial inverter subsystem prototyping requiring stable component supply, traceable sourcing, and long-term evaluation board continuity.

Supply support for STEVAL-IHM025V1 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 microcontrollers, power devices, sensors, and analog ICs, with deep expertise in motor control, industrial automation, and embedded systems.

This board belongs to ST's STEVAL (ST Evaluation) series - purpose-built demonstration platforms designed to accelerate adoption of ST's intelligent power modules and MCU-based motor control solutions in home appliances, HVAC, and industrial drives.

FAQ

Is STEVAL-IHM025V1 compatible with STM32 microcontrollers beyond the STM3210B-EVAL?

Yes - the board features a standardized motor control connector that matches ST's ecosystem of evaluation kits. It supports any STM32-based controller with compatible GPIO mapping for PWM outputs, current sense ADC inputs, hall/encoder signals, and brake control. Firmware adaptation is required for non-STMCU control blocks, but hardware interface signals remain electrically identical.

Does the board support sensorless FOC operation?

Yes - it includes provisions for a BEMF daughterboard (documented in Section 2.2 and Figure 11 of UM0900) and supports six-step sensorless commutation. While the base board does not include BEMF circuitry, its jumper-configurable shunt network, op-amp conditioning paths, and STM32-compatible signal routing enable seamless integration of third-party or ST-provided sensorless FOC firmware stacks.

What thermal management provisions are included?

The STGIPL14K60 module is mounted directly onto an integrated heatsink with earth-connected thermal pad (J1 connector). Temperature feedback is provided via an NTC thermistor (U7) monitoring module case temperature, feeding into an overtemperature protection comparator. The board layout uses ~45 µm copper thickness and optimized thermal vias to sustain 1 kW operation under forced-air cooling per ST's validation test conditions.

Can the DC bus voltage measurement be used for closed-loop voltage control?

Yes - the voltage divider network (R32/R33/R42) feeding the precision reference comparator (U3) provides a calibrated, isolated DC bus voltage signal accessible at test point TP1. This analog signal is routed to the MCU's ADC input via the motor control connector, enabling real-time bus voltage monitoring and closed-loop DC-link regulation in custom firmware implementations.