March 2013

© 2010 Fairchild Semiconductor Corporation

www.fairchildsemi.com

FAN4147 • Rev. 1.0.1

FAN4147

Ground Fault Interrupter

Features

Applications

Description

The FAN4147 is a low-power Ground Fault Interrupter

(GFI) controller for detecting hazardous current paths to

ground and ground-to-neutral faults. The FAN4147

application circuit opens the load contacts before a

harmful shock occurs.

Internally, the FAN4147 contains a diode rectifier,

precision bandgap 12V shunt regulator, precision low-

window-detection comparators, and an SCR driver. With

a

minimum

number

of external components,

the

FAN4147 detects and protects against a hot-wire-to-

ground fault and a neutral-line-to-neutral-load short. The

minimal

components

and

the

small

SuperSOT

™

package allow for a small-form-factor, low-cost solution.

The FAN4147 circuitry has a built-in rectifier and shunt

regulator that operates with a low quiescent current.

This allows for a high-value, low-wattage-series supply

resistor. The internal temperature-compensated shunt

regulator, sense amplifier, and bias circuitry provide for

sense amplifier allows direct coupling of the sense coil

to the amplifier’s feedback signal. This eliminates the

large 50/60Hz AC-coupling capacitor. The internal delay

filter rejects high-frequency noise spikes common with

inductive loads. This decreases false nuisance tripping.

The internal SCR driver is temperature compensated

and designed to satisfy the current requirements for a

wide selection of external SCRs.

The minimum number of external components and the

6-pin SuperSOT

™ package enable a low-cost, compact

design and layout.

Ordering Information

Part Number

Operating

Temperature Range

Package

Packing Method

FAN4147SX

-35°C to +85°C

6-Lead SUPERSOT6, JEDEC M0-193, 1.6mm

Tape and Reel