NCS37000

NCS37000 Ground Fault Circuit Interrupter (GFCI) Description The NCS37000 is a fully UL943 compliant signal processor for GFCI applications. The device integrates a flexible power supply (including both shunt and LDO regulators), differential fault, and grounded-neutral detection circuits. Proprietary impedance measurement and signal processing techniques are used to minimize the number of external components and improve performance. The device also includes a specialized DSP controller that offers best in class immunity to nuisance loads without the need for external analog filters. Features 6.0 – 12 Volt Operation (120 − 480 V AC mains with the appropriate series impedance) −40 to 85°C Very Low Power Consumption: <5 mW @ 5 V 16 Pin QFN Package or 20 Pin TSSOP Package Single Current Transformer (CT) Detection of both Differential and Grounded−Neutral Faults Self Syncing Internal Oscillator Adjusts to AC Mains Frequency to Guarantee Full Resolution on ...