FAN4147 Ground Fault Interrupter Datasheet

Category: Electronics, Fairchild Semiconductor, Other Semiconductors

Overview

The FAN4147 is a low-power controller designed specifically for ground fault interrupter (GFI) applications, capable of detecting hazardous currents and preventing electric shocks by opening load contacts promptly. Manufactured by Fairchild Semiconductor, the FAN4147 is optimized for GFCI (Ground Fault Circuit Interrupter) and RCD (Residual Current Device) applications.

Features

The device features a precision sense amplifier, bandgap reference, built-in AC rectifier, a low-voltage SCR disable function, and an SCR gate driver. It boasts adjustable sensitivity, ensuring tailor-made operation for various protection needs. The FAN4147 operates with a minimal quiescent current of 40uAA and requires few external components for functionality, complying with UL 943 requirements.

The integrated components within the FAN4147 facilitate a compact and cost-efficient solution for fault detection systems. Its SuperSOTTM 6-pin package is tailored for space-saving implementations, making it suitable for both 120V and 220V systems.

Applications

The controller is commonly used in GFCI output receptacles, GFCI circuit breakers, and portable GFCI cords. This reflects its broad applicability in a range of safety-critical electrical infrastructure.

Technical Highlights

The internal functionality of the FAN4147 includes a temperature-compensated shunt regulator, a low-Vos offset-sense amplifier allowing direct DC coupling to the sense coil, and a time delay noise filter that mitigates false tripping by rejecting high-frequency noise spikes. This high precision in ground-fault detection is critical for the reliable operation of GFCIs.

Additionally, the SCR driver within the FAN4147 is designed for temperature stability and compatibility with a wide range of external SCRs.

Ordering and Packaging Information

The product is designated with the part number FAN4147SX and is specified to operate within a temperature range of -35°C to +85°C. It is supplied in a 6-Lead SuperSOT-6 package, conforming to JEDEC MO-193 standards, with a width of 1.6mm. The units are packed in tape and reel format for ease of assembly during the manufacturing process.

Summary

In summary, the FAN4147 Ground Fault Interrupter by Fairchild Semiconductor represents a robust solution for detecting and mitigating ground fault-related electrical hazards. Rolled out in a compact, efficient package, it facilitates not only a reduction of space and material costs but also ensures a standard of safety compliance necessary for residential and industrial power systems.