august 2013 docid025092 rev 1 1/4 www.st.com STEVAL-IHT005V2 demonstration board with full 3. 3 v acs/triac control using the stm32f100 data brie f features ? 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 ? i 2 c bus hardware/software ready ? 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-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 iec- 61000-4-4 (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.
schematic diagram STEVAL-IHT005V2 2/4 docid025092 rev 1 1 schematic diagram figure 1: STEVAL-IHT005V2 circuit schematic
STEVAL-IHT005V2 revision history docid025092 rev 1 3/4 2 revision history table 1: document revision history date revision changes 05-aug-2013 1 initial release.
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