Product Overview NCS37012: Single CT UL943 GFCI with Self Test For complete documentation, see the data sheet Product Description The NCS37012 is a fully UL943 compliant signal processor for GFCI applications with self test. The device integrates a flexible power supply (including both shunt and LDO regulators), differential fault, and grounded-neutral detection circuits. Proprietary impedance measurement and signal processing techniques are used to minimize the number of external components and improve performance. The device also includes a specialized DSP controller that offers best in class immunity to nuisance loads without the need for external analog filters. Self-test is monitored every 17 minutes through an external current path and internally generated grounded neutral fault. Features Benefits • full self test and trip indicator monitoring • fully compliant with UL self test requirements and minimal BOM impact • compatible with global AC power systems • self syncing internal oscillator adjusts to AC mains frequency to guarantee full resolution on 50 and 60Hz distribution systems • randomized testing sequence to noise sensitivity and potential interactions on the AC mains • high SCR drive current (up to 5mA) Applications • robust design • compatible with high Igt SCR's for improved noise immunity End Products • UL943 compliant GFCI products • GFCI receptacles • GFCI circuit breakers • GFCI power cords Part Electrical Specifications Product Compliance Status Channels VCC Min (V) VCC Max (V) IT Max (mA) VI Typ (V) TA Min (°C) TA Max (°C) Package Type NCS37012DBRG Pb-free Active 1 6 12 2.2 1.8 -40 85 TSSOP-20 Active 1 6 12 2.2 1.8 -40 85 QFN-16 Halide free NCS37012MNTWG Pb-free Halide free For more information please contact your local sales support at www.onsemi.com Created on: 6/30/2016