STMicroelectronics X-NUCLEO-IHM16M1

Overview

X-NUCLEO-IHM16M1 from STMicroelectronics is a three-phase brushless DC motor driver expansion board based on the STSPIN830 monolithic gate driver IC, designed for integration with STM32 Nucleo development boards via Arduino and ST morpho headers. It supports single- and three-shunt current sensing, delivers up to 1.5 A_RMS output current, operates from 7–45 V supply, and includes BEMF sensing, bus voltage monitoring, PCB temperature sensing, and Hall/encoder input support.

For engineers reviewing the X-NUCLEO-IHM16M1 datasheet, X-NUCLEO-IHM16M1 pinout, X-NUCLEO-IHM16M1 application, or X-NUCLEO-IHM16M1 equivalent, key selection considerations include PWM input flexibility (3- or 6-input mode), adjustable current limit reference, integrated overcurrent/short-circuit/interlock protection, thermal shutdown, and full compatibility with STM32 Motor Control SDK (X-CUBE-MCSDK).

Technical Context

The board implements closed-loop BLDC motor control using the STSPIN830's embedded PWM current limiter with user-adjustable threshold, complemented by analog signal conditioning circuitry for shunt-based current feedback (Curr_fdbk1–3), BEMF sensing (bemf1–3), and Hall sensor inputs (H1–H3). It interfaces directly with STM32 MCUs via GPIO, ADC, and timer capture pins mapped to dedicated CN7/CN8/CN9 connectors.

Signal chain design includes opamp-based current sensing (OP303_U/V/W + TSV994), precision resistive dividers for VBUS and temperature (NTC), and configurable jumpers (M5–M8) for sensing topology selection, PWM mode, and fault handling. All protections - undervoltage lockout, thermal shutdown, interlocking, and short-circuit detection - are hardware-asserted and routed to EN_FAULT.

Key Specifications

Availability

X-NUCLEO-IHM16M1 is available at Aetrix Electronics and suitable for industrial motor control prototyping, drone propulsion validation, and home appliance BLDC development requiring stable component supply and rapid SDK-integrated evaluation.

Supply support for X-NUCLEO-IHM16M1 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, sensors, and motor control solutions for industrial, automotive, and consumer markets.

The X-NUCLEO series targets rapid STM32-based prototyping, with the IHM16M1 specifically engineered to accelerate development of field-oriented control (FOC) and six-step commutation for three-phase BLDC/PMSM motors.

FAQ

Is X-NUCLEO-IHM16M1 compatible with all STM32 Nucleo boards?

Yes - it supports all STM32 Nucleo boards with Arduino UNO R3 and ST morpho headers (e.g., NUCLEO-F303RE, NUCLEO-G431RB, NUCLEO-H743ZI2). Pin mapping is fixed per DB3613 schematic; no jumper reconfiguration is needed for basic operation, though firmware must match the selected PWM mode and sensing topology.

Does the board support sensorless BLDC control?

Yes - it includes dedicated BEMF sensing circuitry (bemf1–3 channels with OP303 opamps and RC filtering) and supports trapezoidal commutation without Hall sensors. The STM32 Motor Control SDK (X-CUBE-MCSDK) provides validated sensorless FOC and 6-step examples compatible with this board.

What current sensing topologies does X-NUCLEO-IHM16M1 support?

It supports both single-shunt (one sense resistor shared across phases) and three-shunt (individual resistor per phase) configurations, selected via onboard jumpers M5–M7. Single-shunt reduces BOM cost and PCB area; three-shunt enables simultaneous phase current measurement required for advanced FOC algorithms.

Can I connect external Hall effect sensors or encoders?

Yes - J1 and J3 provide dedicated 5 V-tolerant inputs for Hall sensors (H1/H2/H3) and encoder A/B/Z signals. JP3 configures pull-up/pull-down for open-collector Hall outputs, and the board routes all signals directly to STM32 GPIOs (e.g., PA15, PB10, PC6–PC8) with ESD protection diodes.