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2000 W universal motor control demonstration board based on the STM8S103F2 MCU and T1235H Triac

The STEVAL-IHM029V1 is a low-cost universal motor control demonstration board designed for the home appliance market, with particular focus on vacuum cleaners, food processors and power tools.

This system features the 20-pin, 8-bit STM8S103F2 microcontroller running at 16 MHz (RC user-trimmable internal RC clock), featuring 4 KB of Flash memory, a 10-bit A/D converter, 8/16 bit timers, communication interfaces and 640 bytes E2PROM.

The power supply circuitry is based on the VIPer16L, an off-line converter with an 800 V avalanche-rugged power section, operating at 60 kHz.

The STEVAL-IHM029V1 can control any universal motor up to 2000 W, thanks to the T1235H, a 12 A 600 V high temperature Triac. The motor control is based on phase-angle.

In order to limit the in-rush current and possible current peaks, the demonstration board features a soft-start routine and a smooth power change function.

The board passed the pre-compliance tests for EMC directives IEC 61000-4-4 (burst up to 8 kV) and IEC 61000-4-5 (surge up to 2 kV).

In standby mode, the STEVAL-IHM029V1 has an overall standby power consumption below 300 mW.

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Errata Sheet
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Data Brief

Key Features

  • Input voltage range: 90-265 VAC, 50/60 Hz
  • 12 VDC / 5 VDC auxiliary power supply based on the VIPer16L in buck converter topology
  • Total power consumption below 300 mW in standby mode
  • Maximum output power: 2000 W
  • 20-pin, 8-bit STM8S103F2 MCU as main controller
  • Employs zero-voltage switching (ZVS) to synchronize MCU events with the voltage mains
  • Motor driven by T1235H high-temperature Triac in phase-angle control
  • 5 power levels and standby mode selectable by potentiometer
  • 5 LEDs to display the power level of the board
  • “RUN” LED to indicate the board is functioning
  • Standard in-circuit programming connector
  • IEC 61000-4-4 pre-compliance test passed (burst up to 8 kV)
  • IEC 61000-4-5 pre-compliance test passed (surge up to 2 kV)
  • RoHS compliant


Design Resources


Technical Documentation

Product Specifications

Description Version Size
DB0994: 2000 W universal motor control demonstration board based on the STM8S103F2 MCU and T1235H Triac
1.1 140 KB

User Manual

Description Version Size
UM0922: STEVAL-IHM029V1: 2000 W universal motor control based on the STM8S103F2
1.3 641 KB

Hardware Resources

Board Manufacturing Specification

Description Version Size
Gerber files for STEVAL-IHM029V1
1.0 168 KB

Bill of Materials

Description Version Size
Bill of materials for STEVAL-IHM029V1
1.0 57 KB

Schematic Pack

Description Version Size
STEVAL-IHM029V1 schematics
1.0.0 59 KB

License Agreement

Description Version Size
Evaluation products license agreement
1.0 126 KB

Sample & Buy

Part Number Marketing StatusCore ProductOrder From STUnit Price (US$)*
@ 1
Distributor AvailabilityRoHS Compliance GradeDownload
Material Declaration**
STEVAL-IHM029V1NRNDT1235H, VIPER16, STTH1R06Buy Direct101.67Distributor reported inventory date: 2015-01-30
Distributor NameRegionStockMin. order
Newark Element14Order NowAMERICA20
Farnell Element14Order NowEUROPE41

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors
(**) The Material Declaration forms available on may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.
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