SBFS042 June 2020 AFE3010
The SW_OPEN pin can be used as a reset signal to the device through a mechanical assembly or a micro controller. When the SW_OPEN remains low longer than the debounce time td2, the device fires the SCR. For applications that require a reset without the SCR fire, keep the SW_OPEN low state for shorter duration (in between 55 ms to 75 ms) before transition to high state. The ALARM (LED) function is also modified using the SW_OPEN function. Connect a noise-blocking capacitor to the SW_OPEN pin if this function is not needed.