STMicroelectronics X-NUCLEO-OUT15A1

Overview

X-NUCLEO-OUT15A1 from STMicroelectronics is an industrial digital output expansion board for STM32 Nucleo platforms, built around the IPS1025HF single high-side smart power switch. It delivers 0–2.5 A switching capability across 8–33 V (extendable to 60 V), features 5 kV galvanic isolation via optocouplers, and provides real-time diagnostics including overload and overtemperature detection. It is used in programmable logic controller (PLC) I/O module evaluation and safety-critical cascaded digital output architectures.

For engineers reviewing the X-NUCLEO-OUT15A1 datasheet, X-NUCLEO-OUT15A1 pinout, X-NUCLEO-OUT15A1 application, or X-NUCLEO-OUT15A1 equivalent, this board enables rapid validation of high-side switch behavior under industrial load conditions-including inductive decay control, capacitive load driving, fast discharge sequencing, and fault feedback integration with STM32 GPIOs via Arduino® UNO R3 and Morpho headers.

Technical Context

The board implements a complete isolated digital output stage using TLP383 optocouplers to interface STM32 GPIOs with the IPS1025HF's IN1, FLT1, FLT2, and OUT_FB pins. Control signals are level-shifted and filtered, while diagnostic outputs drive red LEDs and feed back to MCU via optoisolated paths.

It supports two operating modes: standard (8–33 V via Nucleo supply rail) and extended (up to 60 V via J3 open), with configurable fast discharge (J11 pins 5–6 + J12) and external discharge circuitry (J11 pins 7–8) for large inductive loads. Reverse polarity protection and RoHS/CE compliance are hardware-enforced.

Key Specifications

Availability

X-NUCLEO-OUT15A1 is available at Aetrix Electronics and suitable for industrial PLC I/O module development, safety-critical cascaded digital output systems, and STM32-based embedded control prototyping requiring stable component supply and certified CE-compliant hardware.

Supply support for X-NUCLEO-OUT15A1 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, designing and manufacturing microcontrollers, power ICs, sensors, and analog/mixed-signal devices for industrial, automotive, and consumer applications.

The X-NUCLEO-OUT15A1 belongs to ST's X-NUCLEO ecosystem of STM32-compatible expansion boards, engineered specifically to accelerate evaluation and implementation of intelligent power switches in industrial digital output modules with integrated diagnostics and safety features.

FAQ

What microcontroller boards is the X-NUCLEO-OUT15A1 compatible with?

The board is natively compatible with STM32 Nucleo development boards featuring Arduino® UNO R3 and Morpho headers, including NUCLEO-F401RE and NUCLEO-G431RB. It connects directly via these interfaces without adapters, and supports firmware control through standard GPIO and interrupt lines routed through 5 kV optocouplers.

How does the X-NUCLEO-OUT15A1 handle inductive load decay?

It leverages the IPS1025HF's internal fast-decay circuitry, activated automatically during turn-off. When J11 pins 5–6 and J12 are closed, the board enables internal fast discharge; when J11 pins 7–8 are closed, it routes energy to an external discharge circuit-reducing voltage reversal and enabling sub-100 µs decay for 100 mH loads.

Can the X-NUCLEO-OUT15A1 be stacked with other X-NUCLEO boards?

Yes-it supports mechanical and electrical stacking with other X-NUCLEO boards such as X-NUCLEO-OUT05A1. In cascaded mode, the OUT05A1 supplies power to the OUT15A1, enforcing dual-stage safety logic where the load only activates if both boards operate within specification-ideal for SIL2-capable digital output designs.

What certifications does the X-NUCLEO-OUT15A1 hold?

The board is CE certified per EN 61000-6-2 (immunity) and EN 61000-6-4 (emissions), RoHS compliant (2011/65/EU), and China RoHS compliant. It is not FCC approved for resale in the US market, and no UL or IEC 61508 certification is claimed for functional safety compliance out-of-box.