UM1494 Datasheet, PDF (1/23 Pages) STMicroelectronics – The STEVAL-IHT007V1 demonstration board is designed for the home appliance market

UM1494
User manual
STEVAL-IHT007V1, extension board with
AC switches for the STM8S-DISCOVERY kit
1
Introduction
The STEVAL-IHT007V1 demonstration board is designed for the home appliance market,
with a focus on the demonstration of ACS™/Triac control with the STM8S-DISCOVERY kit.
The demonstration board is aimed at applications where ACS and Triacs are used. It may
particularly help appliance designs where only 2 AC switches are required, for example,
coffee machines, bread makers, low-end fridges, etc.
The STEVAL-IHT007V1 embeds an optical isolation of the power and control parts to allow
designers to debug the software with a computer directly connected to the STM8S-
DISCOVERY kit. Therefore, this demonstration board can also be used to evaluate opto-
transistor circuits in applications where isolation between mains and control parts is
required, such as high-end washing machines, dishwashers and dryers where a BLDC
motor is used.
Opto-transitor control has been chosen, as against opto-Triac control, to allow better control
of the duration of the gate current pulse and to ensure better AC switch triggering (especially
for low current loads). The power supply is based on a capacitive power supply. The
STEVAL-IHT007V1 uses SMD ACS/Triac to demonstrate a compact design with the
possibility to control loads up to 500 W. The T1010H-6G, a 12 A 600 V high temperature
Triac, can control loads up to 500 W. The ACS108-6SUF, a 0.8 A 600 V overvoltage
protected ACSTM device, can control low power loads up to 100 W.
The demonstration 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). The STEVAL-
IHT007V1 has an overall power consumption below 500 mW at 264 V/50 Hz due to the
optimized capacitive power supply.
Figure 1. STEVAL-IHT007V1 demonstration board
March 2012
Doc ID 022519 Rev 1
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