SBFS042 June 2020 AFE3010
The AFE3010 is a Ground Fault Circuit Interrupter (GFCI) controller to detect the presence of leakage paths that could lead to potential injuries from electric shock. This device is designed to develop UL-943 compliant system like a GFCI receptacle or circuit-breaker. The self-test functionality ensures that the circuit is operating correctly prior to an actual fault event. A GFCI device relies on the imbalance of differential current through the transformer to detect a ground fault. The presence of a neutral-ground leakage path can potentially mask some of this imbalance through the transformer during an actual ground fault event, resulting in safety hazard for the downstream equipments connected to the GFCI unit. The AFE3010 employs an unique closed-loop neutral-ground leakage detection scheme to alleviate this safety hazard. The precision, low-noise amplifier along with the threshold detection filters in the AFE3010 ensure accurate detection of fault events while minimizing unintended false alerts.