STEVAL-IHT001V2:Cold thermostat kit based on AC switches and the STM8S

The STEVAL-IHT001V2 thermostat kit provides a robust and low-cost ST solution (microcontroller and AC switches) to control refrigerators, freezers or fridge/freezer combinations.

Basic, defrost, and air circulation versions are configurable in order to address the low-end and medium-end cooling appliances market. It allows the control of a single-phase induction motor and a light bulb, and optionally, a defrost resistor and a fan, working on 220/240 VRMS, 50/60 Hz mains voltage. The thermostat kit is operational with 100/120 V RMS 50/60 Hz but the supply capacitor value must be modified.

The board can operate in an ambient temperature range from 0 °C to 60 °C.

The exact maximum temperature depends on the power of the loads. For demonstrative purposes a graphic user interface (GUI) has been developed.

The connection between the PC and STM8S microcontroller, the MCU performing thermostat regulation, is achieved through a USB bus.

As the STM8S is a low-cost MCU without an embedded USB peripheral, an additional MCU (STM32) has been used as a bridge between the PC and STM8S MCU, for demonstrative purposes only.

Key Features

  • Low-cost solution for spark-free thermostats:
    • No need for a sealed version
    • Low-cost STM8S microcontroller for thermostat control
    • Low-cost capacitive power supply
  • High efficiency:
    • Refrigerator consumption reduction by adjusting and reducing the hysteresis threshold of the temperature
    • Improved efficiency by turning on the defrost resistor only when it's useful and not at each OFF cycle of the compressor (as done in some mechanical thermostats)
  • High system immunity:
    • Overvoltage protected ACS switches: ACST610-8FP for compressor control, ACS110-7SN for defrost resistor and ACS102-6TA for light bulb and fan
    • Class A criteria for IEC 61000-4-4 up to above 3 kV levels
  • Flexibility:
    • Development: program setting with PC interface to change firmware variables
    • Industrialization: end-of-production MCU programming thanks to FLASH, for soft upgrade and efficient MCU stock management
  • RoHS compliant
产品规格
DescriptionVersionSize
DB1651: Cold thermostat kit based on AC switches and the STM8S3.0142 KB
用户手册
DescriptionVersionSize
UM1542: Cold thermostat kit based on AC switches and the STM8S003F31.02 MB
Board Manufacturing Specifications
DescriptionVersionSize
STEVAL-IHT001V2 gerber files1.0286 KB
Bill of Materials
DescriptionVersionSize
STEVAL-IHT001V2 BOM1.151 KB
Schematic Packs
DescriptionVersionSize
STEVAL-IHT001V2 schematics1.1122 KB
许可协议
DescriptionVersionSize
Evaluation products license agreement1.0125 KB
Evaluation Tool Software
型号制造商Description
STSW-IHT001V2STSTEVAL-IHT001V2 thermostat setup
样片和购买
型号Core ProductUnit Price (US$) *QuantityECCN (EU)ECCN (US)Country of Origin
STEVAL-IHT001V2ACST610; ACS110; ACS102; STM32F103C6; STM8S103F3208.251NEC3A991A2ITALY
质量和可靠性
型号PackageGradeRoHS Compliance GradeMaterial Declaration**
STEVAL-IHT001V2CARDIndustrialEcopack2
Cold thermostat kit based on AC switches and the STM8S STEVAL-IHT001V2
Cold thermostat kit based on AC switches and the STM8S003F3 STEVAL-IHT001V2
Cold thermostat kit based on AC switches and the STM8S003F3 STEVAL-IHT001V2
Cold thermostat kit based on AC switches and the STM8S003F3 STEVAL-IHT001V2
Cold thermostat kit based on AC switches and the STM8S003F3 STEVAL-IHT001V2
ST-LINK/V2 in-circuit debugger/programmer for STM8 and STM32 ST-LINK-V2