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STEVAL-IHT005V2
Demonstration board with full 3.3 V ACS/Triac control using the
STM32F100
Data brief
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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
Features
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Complete solution for -3.3 V control
Input voltage range: 90-265 VAC 50/60 Hz
Negative 6 V/3.3 VDC aux power supply
based on the VIPer16L in buck-boost
topology
Total power consumption in standby mode
lower than 0.5 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
1 x T1635H-6T and 1 x ACST1635-8FP for
phase control of high power loads
5 discrete power level states with soft
change for phase-angle controlled devices
1 x Z0109 and 3 x ACS108 for full wave
control of low power loads
Relay to demonstrate board noise
robustness
Red LED to indicate board mains supply
Green LED for each ACS/ACST/Triac to
indicate device on/off status
JTAG programming connector
External wire loop for gate current
measurement
I2C bus hardware/software ready
August 2013
The STEVAL-IHT005V2 is designed as a
complete solution proposal for home appliance
applications based on STMicroelectronics™
components. Special emphasis is placed on
demonstration of a robust full 3.3 V solution,
based on 4 kV level in class A during an IEC61000-4-4 (burst) test. The board also allows
designers to evaluate the feasibility of AC switch
control with a 3.3 V supply. Gate currents can be
measured and compared to the information given
in application note AN2986. STEVAL-IHT005V2
is based on the recently-introduced 48-pin, 32-bit
STM32F100C4T6B MCU 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
the 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-IHT005V2
can control 2 high power loads up to 2830 W
thanks to the T1635H, a 16 A, 600 V high
temperature Triac and up to 2050 W using the
ACST1635-8FP, a 16 A, 800 V high temperature
overvoltage-protected ACST device. The high
power load control is based on phase-angle
control. To limit inrush current and possible
current peaks, the board features a soft-start
routine and a smooth power change function for
the high power loads. The STEVAL-IHT005V2
can also control 4 low power loads up to 100 W
thanks to 3 ACS108-8S, 0.8 A, 800 V
overvoltage-protected ACS devices and a Z0109,
1 A standard 4 quadrant 600 V Triac.
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Schematic diagram
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STEVAL-IHT005V2
Schematic diagram
Figure 1: STEVAL-IHT005V2 circuit schematic
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Revision history
Revision history
Table 1: Document revision history
Date
Revision
05-Aug-2013
1
DocID025092 Rev 1
Changes
Initial release.
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