GFCI Controllers | FAN4147

Ground Fault Interupter

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Overview

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-VOS offset-sense amplifier, time delay noise filter, 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 precision ground-fault detection. The low-VOS offset-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.

  • Building & home control
  • Consumer appliances

  • For GFCI and RCD applications
  • Precision sense Amplifier and bandgap reference
  • Built-in AC rectifier
  • Built-in noise filter
  • Low-voltage SCR disable
  • Direct DC coupled to sense coil
  • SCR gate driver
  • Adjustable sensitivity
  • 400µA quiescent current
  • Minimum external components
  • Meets UL943 requirements
  • Ideal for 120V or 220V systems

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FAN4147SX

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Obsolete

CAD Model

Pb

A

H

P

TSOT-23-6

419BL

1

260

REEL

3000

N

~NA~

-1.2

16

15

12.7

-35

85

Price N/A

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Reliability Data

Die Related Summary Data

Device: FAN4147SX

Equivalent to wafer fab process: 3

Product Technology

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Equivalent Device-Hours

MTBF/MTTF in Hours

FITS

3

0

177026424

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Data is based on the following assumptions.

Note: The temperature and confidence level may be adjusted to your requirements.

Disclaimer: A reliability FIT rate calculated using this tool shall not be used for any functional safety purpose. In case a raw FIT rate needs to be estimated for a component which is targeted to be used in a safety critical application (i.e. compliant to ISO 26262 standard) it should be calculated according to generic safety standards (IEC62380, IEC61709, SN29500, FIDES, etc.)

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