data brief for further information contact your local stmicroelectronics sales office. december 2010 doc id 18344 rev 1 1/4 4 STEVAL-IHT005V1 3.3 v control of acs/triac with stm32 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 switchin g (zvs) interrupt to synchronize mcu events with voltage mains 1x t1235h-6t and acst12-7c for phase control of high power loads 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. STEVAL-IHT005V1 www.st.com
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STEVAL-IHT005V1 revision history doc id 18344 rev 1 3/4 2 revision history table 1. document revision history date revision changes 15-dec-2010 1 initial release.
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