DESCRIPTION

· The NCS37005 is a signal processor designed for Ground Fault Interrupter (GFI) applications.
· It integrates a flexible power supply, including shunt and LDO regulators, and differential fault detection circuits.
· Features a specialized DSP controller for enhanced immunity to nuisance loads without external analog filters.

FEATURES

· Operates from 6.0 to 18 V, compatible with 120-480 V AC mains.
· Temperature range: -40 to 85 °C.
· Low power consumption: <5 mW at 5 V.
· 16-pin QFN package.
· Utilizes low-cost, low-turns ratio ferrite current transformers for differential detection.
· Self-syncing internal oscillator adjusts to AC mains frequency for full resolution on 50 and 60 Hz systems.
· Optimized solenoid deployment to avoid energizing near AC mains zero crossings.
· Randomized testing sequence to minimize noise and interactions on AC mains.
· >5 mA SCR driver for additional immunity to supply noise/interference.
· Superior immunity to nuisance loads/noise up to 10 A without loss of detection capability or CT saturation.
· Pb-free, halogen-free/BFR-free, and RoHS compliant.

APPLICATIONS

· Load panel GFI/RCD breakers.
· GFI receptacles.
· In-line GFI circuits (power cords).