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GFCI Controllers | FAN4149

Ground Fault Interrupter

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Overview

The FAN4149 is a low-power controller for detecting hazardous current paths to ground and ground-to-neutral faults. The FAN4149 application circuit opens the load contacts before a harmful shock occurs.
The FAN4149, in combination with the FAN41501 auto-monitoring digital controller, meets the 2015 UL943 self-test requirements for permanently connected GFCI products. The FAN4149 detects and protects against a hot-wire-to-ground fault and a neutral-to-line/load short. The FAN41501 periodically monitors the FAN4149 and critical GFI components to comply with the 2015 UL943 requirements. The minimum number of components and the small 6-pin package allow for a dense, flexible, application solution.
The FAN4149 contains a precision bandgap 14 V shunt regulator, precision low-VOS sense amplifier, time-delay noise filter, window-detection comparators, and an SCR driver. The shunt regulator operates with a low quiescent current, which 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. This enables the use of larger component variations so that binning or trimming external components is not required. The typical ±50 µV VOS sense amplifier offset allows for direct DC coupling of the sense coil. This eliminates the large AC-coupling capacitor. The internal delay filter rejects high-frequency noise spikes common with inductive loads. This decreases false nuisance tripping. The SCR driver provides increased current and temperature compensation to allow for a wider selection of external SCRs.
The minimum number of external components and the 6-pin SOT23 package allow a low-cost, compact design and layout.

  • Building & home control
  • Consumer appliances

  • Meets 2015 UL943 self-test requirements (in combination with FAN41501)
  • Precision sense amplifier and bandgap reference
  • Low-VOS offset for direct DC coupling of sense coil
  • Built-in noise filter
  • High-current SCR gate driver
  • Adjustable sensitivity
  • 500µA quiescent current
  • Minimum external components
  • Ideal for 120 V or 220 V systems

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FAN4149M6X

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Last Shipments

CAD Model

Pb

A

H

P

SOT-23-6

527AJ

1

260

REEL

3000

N

~NA~

-0.8

16

15

14

-35

85

Price N/A

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Reliability Data

Die Related Summary Data

Device: FAN4149M6X

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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Re-calculate Data

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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