August 2006
Rev 1
1/32
UM0277
User manual
Getting started with the
Cold Thermostat Kit based on AC switches and ST7LITE MCU
Introduction
The STEVAL-IHT001V1 Thermostat Kit (figure below) is designed to control a refrigerator or
a freezer. This thermostat kit enables the control of a single-phase induction motor, a light
bulb and a defrost resistor (or a fan) working on 230 V
RMS
50/60 Hz mains voltage.
The board can operate in an ambient temperature range of 0 to 40 °C. The exact maximum
temperature depends on the power of the loads (
The kit includes a Graphic User Interface (GUI) for sending commands to the ST7LITE39F2
Microcontroller or to access MCU information via the Serial Communication Interface (SCI).
This enables users to easily change MCU software parameters and acquire measurements
during appliance testing.
This document provides all the information needed to make the board work (how to connect
it, how it works). For specific information about modifying MCU parameters, please refer to
the “Help” section of the GUI software.
STEVAL-IHT001V1 Thermostat Kit
The main goals of this tool are:
●
Evaluate full ST solution (microcont AC switch) for cold thermostat applications
●
Measure and save the appliance main parameters during operation (load status,
compressor operation duty cycle and running period, evaporator temperature)
●
Check and analyze efficiency gains by reducing the Hysteresis threshold or adapting
the defrost resistor management
●
Check the board immunity against fast transient voltages (without GUI connection).
