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This literature is subject to all applicable copyright laws and is not for resale in any manner.FAN4149 Ground Fault Interrupter July 2014 FAN4149 Ground Fault Interrupter Description Features The FAN4149 is a low-power controller for detecting Meets 2015 UL943 Self-Test Requirements hazardous current paths to ground and ground-to- (in combination with FAN41501) neutral faults. The FAN4149 application circuit opens Precision Sense Amplifier and Bandgap Reference the load contacts before a harmful shock occurs. Low-V Offset for Direct DC Coupling of Sense Coil The FAN4149, in combination with the FAN41501 auto- OS monitoring digital controller, meets the 2015 UL943 self- Built-in Noise Filter test requirements for permanently connected GFCI High-Current SCR Gate Driver products. The FAN4149 detects and protects against a hot-wire-to-ground fault and a neutral-to-line/load short. Adjustable Sensitivity The FAN41501 periodically monitors the FAN4149 and critical GFI components to comply with the 2015 UL943 500 A Quiescent Current requirements. The minimum number of components and Minimum External Components the small 6-pin package allow for a dense, flexible, application solution. Ideal for 120 V or 220 V Systems Space-Saving, SOT23, 6-Pin Package The FAN4149 contains a precision bandgap 14 V shunt regulator, precision low-V sense amplifier, time-delay OS noise filter, window-detection comparators, and an SCR Applications driver. The shunt regulator operates with a low quiescent current, which allows for a high value, low- GFCI Output Receptacle wattage series supply resistor. The internal temperature GFCI Circuit Breakers compensated shunt regulator, sense amplifier, and bias circuitry provide for precision ground-fault detection. Portable GFCI Cords This enables the use of larger component variations so Residual-Current Devices (RCD) that binning or trimming external components is not required. The typical 50 V V sense amplifier offset OS 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. Ordering Information Operating Part Number Package Packing Method Temperature Range FAN4149M6X -35C to +85C 6-Lead, SOT23, JEDEC M0-178, 1.6 mm Tape and Reel 2014 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN4149 Rev. 1.0.0