FAN4149: Ground Fault Interrupter

Description: The FAN4149 is a low-power controller for detectin...
  • 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.
  • Features
  • 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
  • Applications
  • Building & home control
  • Consumer appliances
  • Technical Documentation & Design Resources
    Availability and Samples
  • Status: Active
  • Compliance: Pb-free Halide free 
  • Description: Ground Fault Interrupter
  • Package Type: SOT-23-6
  • Package Case Outline: 527AJ
  • MSL: 1
  • Container Type: REEL
  • Container Qty: 3000
  • Inventory

  • Market Leadtime (weeks):8 to 12
  • Arrow:0
  • Digikey:>1K
  • Specifications
  • Channels:  
  • VCC Min (V): -0.8 
  • VCC Max (V): 16 
  • IT Max (mA): 15 
  • VI Typ (V): 14 
  • TA Min (°C): -35 
  • TA Max (°C): 85 
  • Package Type: SOT-23-6 
  • ON Semiconductor Full Web Site