FAN4147: Ground Fault Interupter
Description: The FAN4147 is a low-power Ground Fault Interrupte...
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.
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
400µA quiescent current
Minimum external components
Meets UL943 requirements
Ideal for 120V or 220V systems
Building & home control
Technical Documentation & Design Resources
Availability and Samples
Compliance: Pb-free Halide free
Description: Ground Fault Interupter
Package Type: TSOT-23-6
Package Case Outline: 419BL
Container Type: REEL
Container Qty: 3000
Market Leadtime (weeks):2 to 4
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