STEVAL-IHT005V1 Datasheet, PDF (1/4 Pages) STMicroelectronics – 3.3 V control of ACS/Triac with STM32

STEVAL-IHT005V1
3.3 V control of ACS/Triac with STM32
Data brief
Features
■ Complete solution for -3.3 V control
■ Input voltage range: 90-265 VAC, 50/60 Hz
■ Negative 6 V/3.3 V VDC auxiliary power supply
based on the Viper16L in buck-boost topology
■ Total power consumption in standby mode is
lower than 0.3 W for 264 V / 50 Hz
■ 48-pin, 32-bit value line family
STM32F100C4T6B MCU as main controller
■ Zero voltage switching (ZVS) interrupt to
synchronize MCU events with voltage mains
■ 1x T1235H-6T and ACST12-7C for phase
control of high power loads
STEVAL-IHT005V1
■ 5 discrete power level states with soft change
for phase angle controlled devices
■ 1x Z0109 and 3x ACS108 for full wave control
of low power loads
■ 1x relay for demonstration of the board noise
robustness
■ “Red” LED to show the board is supplied from
mains
■ “Green” LED for each ACS/ACST/Triac to
show the device is turned on
■ 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
Description
The STEVAL-IHT005V1 demonstration board is
designed for the home appliance market, with a
focus on the demonstration of a robust solution
with a 3.3 V supplied 32–bit MCU. Target
applications are mid-end and high-end washing
machines, dishwashers, and dryers, with different
kinds of ACS/Triacs. The demonstration board is
based on the 48-pin 32-bit
STM32F100C4T6BMCU, running at 24 MHz (RC
user-trimmable internal RC clock), featuring 16
kBytes of Flash memory, 12-bit A/D converter, 5
timers, communication interfaces, and 4 kBytes of
SRAM.
The power supply circuitry is based on VIPer16L,
an offline converter with an 800 V avalanche
rugged power section, operating at 60 kHz. The
power supply provides negative 6 V in buck-boost
topology. The STEVAL-IHT005V1 can control two
high power loads up to 2640 W, thanks to the
T1235H, a 12 A 600 V high temperature Triac,
and up to 1840 W ACST12-7C, 12 A 700 V
overvoltage protected ACSTTM device. The high
power load control is based on phase angle
control. To limit the in-rush current and possible
current peaks, the demonstration board features a
soft-start routine and a smooth power change
function for the high power loads. The STEVAL-
IHT005V1 can also control 4 low power loads up
to 100 W, thanks to 3 ACS108-6S, 0.8 A 600 V
overvoltage protected ACSTM devices and a
Z0109, 1 A standard 4 quadrant 600 V Triac. 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).
When put in standby mode, the STEVAL-
IHT005V1 has an overall standby power
consumption below 300 mW at 264 V / 50 Hz.
December 2010
Doc ID 18344 Rev 1
1/4
For further information contact your local STMicroelectronics sales office.
www.st.com
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