STMicroelectronics STEVAL-IHP002V2

Overview

STEVAL-IHP002V2 from STMicroelectronics is a PLM-based smartplug demonstration board implementing energy monitoring and on/off load control for AC mains applications. It integrates the STM32F103CB microcontroller, ST7540 power line modem (4.8 kbps), and STPM01 mono-phase energy metering IC, with dual-contact relay output (NO/NC) and UART expansion interface.

For engineers reviewing the STEVAL-IHP002V2 datasheet, STEVAL-IHP002V2 pinout, STEVAL-IHP002V2 application, or STEVAL-IHP002V2 equivalent, this board serves as a validated reference design for smart grid node development, PLM interoperability testing, and embedded energy metering firmware evaluation - all within a standard "503" wall box form factor.

Technical Context

The board implements a complete PLM smartplug node: the ST7540 handles physical-layer communication over AC wiring using Band C (132 kHz) with non-isolated topology, while the STPM01 performs real-time voltage/current sampling, active energy calculation, and zero-crossing detection. The STM32F103CB executes firmware for data aggregation, relay control logic, and PLM command framing.

Power delivery includes dual-rail conversion: 12 V DC derived from mains via transformer T2 and BRMB6S-RC bridge rectifier, then regulated to 3.3 V by LD1117ADT33TR; analog sections are isolated via dedicated ground planes and filtering (e.g., C122/C123 for EMI suppression). Relay K2 (RS 365-0535) supports 16 A switching with opto-isolated drive (U13 ALTAIR05T-800).

Key Specifications

Availability

STEVAL-IHP002V2 is available at Aetrix Electronics and suitable for smart grid node prototyping, PLM interoperability validation, and embedded energy metering firmware development requiring stable component supply and documented reference hardware.

Supply support for STEVAL-IHP002V2 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 ICs, and sensor solutions for industrial, automotive, and consumer markets.

This board belongs to ST's STEVAL (ST Evaluation) series - purpose-built reference platforms that demonstrate system-level integration of ST's core ICs (STM32, STPM, ST7540) for smart energy, power line communication, and IoT edge sensing applications.

FAQ

What communication protocols does the STEVAL-IHP002V2 support?

The board natively supports power line communication using the ST7540 PLM IC compliant with CENELEC EN 50065-1 Band C (132 kHz). It also provides USART (TTL-level) for host MCU or PC connectivity and JTAG/SWD for debugging the STM32F103CB. No built-in Wi-Fi, Bluetooth, or Zigbee is present.

Can the relay output be used for inductive loads like motors or transformers?

Yes - the RS 365-0535 relay is rated for 16 A resistive and 10 A inductive loads at 250 VAC. Its SPDT configuration and snubber components (D13, R106) provide protection against back-EMF. For sustained motor cycling, external arc suppression or contactor derating is recommended per IEC 60947-5-1.

Is calibration required before first use?

Yes - the STPM01 energy measurement channel requires per-unit calibration using the on-board CAL connector (J6) and reference resistor network (R94–R103). Factory calibration is not performed; users must execute gain/offset compensation routines via SPI to achieve <±0.2% accuracy across voltage and current channels.

Does the board include firmware, and is source code available?

ST provides preloaded demonstration firmware (v1.0.0, Doc ID 022253) supporting PLM command parsing, energy register reads, and relay toggling. Full source code, HAL drivers, and PLM stack documentation are available in the STSW-IHP002 software package on st.com - licensed under ST's SLA for evaluation and design reuse.