NCS37012DBG ON Semiconductor

NCS37012 Self Test Ground Fault Circuit Interrupter (GFCI) Description The NCS37012 is a fully UL943 compliant signal processor for GFCI applications with self test. The device integrates a flexible www.onsemi.com 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 20 1 device also includes a specialized DSP controller that offers best in QFN16 TSSOP20 class immunity to nuisance loads without the need for external analog 1 MN SUFFIX DA SUFFIX filters. Self test is monitored every 17 minutes through an external CASE 485G CASE 948E current path and internally generated grounded neutral fault. MARKING DIAGRAMS Features 6.0 V 12 V Operation (120 480 V AC mains with the appropriate 3701 series impedance) 37012 2DBG MNG 40 to 85C ALYW ALYW Very Low Power Consumption: <15 mW 5 V 16 Pin QFN Package or 20 Pin TSSOP Package XXXXX = Specific Device Code Single Current Transformer (CT) Detection of both Differential and A = Assembly Location GroundedNeutral Faults L = Wafer Lot Full Self Test and Trip Indicator Monitoring Y = Year W = Work Week Self Syncing Internal Oscillator Adjusts to AC Mains Frequency to = PbFree Package Guarantee Full Resolution on 50 and 60 Hz Distribution Systems (Note: Microdot may be in either location) Optimized Solenoid Deployment (coil is not energized near the AC mains zero crossings) PIN CONNECTIONS Randomized Testing Sequence to Minimize Noise and Potential Interactions on the AC Mains >5 mA SCR Driver for use with High Igt SCRs for Improved Noise 1 Immunity MLD Superior Immunity to Nuisance Loads/Noise (up to 10 A) without CTresGN GND Loss of Detection Capability or CT Saturation (Top View) CTbias These Devices are PbFree, Halogen Free/BFR Free and are RoHS CTstim Compliant Typical Applications Load Panel GFCI Breakers GFCI Receptacles ORDERING INFORMATION Inline GFCI Circuits (power cords) Device Package Shipping NCS37012MNTWG QFN16 3000 / Tape & (PbFree) Reel NCS37012DBRG TSSOP20 2500 / Tape & (PbFree) Reel For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specification Brochure, BRD8011/D. Semiconductor Components Industries, LLC, 2016 1 Publication Order Number: May, 2016 Rev. 0 NCS37012/D CTresD Supply IDF SCRdrvNCS37012 HV Brown Bandgap Out + AVDD/ DVDD + POR CTresGN Grounded Neutral Detection IDF Digital Filter Low Differential Current Pass Detection Filter SCRdrv Mixer Self Control Logic LED(1) Trimmed RC Osc CTresD LED(0) PTT GROUND FAULT GN DETECTION TE Waveform Generator SELF TEST CTstim tripEN PZ MLD Mains Level CTbias Detector / GN Lockout Randomizer TI Detector Figure 1. Simplified Block Diagram www.onsemi.com 2 Vbias Driver GFtest Offset Correction Supply Ground