This document is AN1353 application note from STMicroelectronics, which introduces the software design of ST62000C, a low power electronic thermostat for 220-240V 50Hz cold appliances.
The document details the software architecture and hardware configuration for a low-cost electronic thermostat demonstration kit developed by STMicroelectronics. The system is designed to control cold appliances operating on 220-240V, 50Hz mains power.
Key functions implemented in the microcontroller include temperature regulation via NTC resistor input with hysteresis, compressor monitoring and control using triacs (Ts and Tr), overcurrent detection based on peak current measurement through a shunt resistor, and internal light bulb control. The note also covers specific hardware constraints such as negative supply voltage generation and timing calculations for gate current pulses.
The software and hardware are dedicated to 220/240 V 50 Hz applications.
The maximum duration for the Calcul_Delay_2 subroutine is 5.49 ms.