© Semiconductor Components Industries, LLC, 2012
April, 2012 − Rev. P0
1 Publication Order Number:
NCS37005/D
NCS37005
Product Preview
Ground Fault Interrupter
(GFI)
Description
The NCS37005 is a signal processor for GFI applications. The
device integrates a flexible power supply (including both shunt and
LDO regulators), and differential fault detection circuits. The
proprietary fault processing circuitry offers high performance with
low turns ratio ferrite current transformers. The device also includes a
specialized DSP controller that offers best in class immunity to
nuisance loads without the need for external analog filters.
Features
• 6.0 – 18 Volt Operation (120 − 480 V AC Mains with the Appropriate
Series Impedance)
• −40 to 85°C
• Very Low Power Consumption: <5 mW @ 5 V
• 16 Pin QFN Package
• Low Cost/Turns Ratio Ferrite Current Transformer (CT) Detection of
Differential
• Self Syncing Internal Oscillator Adjusts to AC Mains Frequency to
Guarantee Full Resolution on 50 and 60 Hz Distribution Systems
• Optimized Solenoid Deployment (coil is not energized near the AC
mains zero crossings)
• Randomized Testing Sequence to Minimize Noise and Potential
Interactions on the AC Mains
• >5 mA SCR Driver for Additional Immunity to Supply
Noise/Interference
• Superior Immunity to Nuisance Loads/Noise (up to 10 A) without
Loss of Detection Capability or CT Saturation
• These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS
Compliant
Typical Applications
• Load Panel GFI/RCD Breakers
• GFI Receptacles
• In−line GFI Circuits (power cords)
This document contains information on a product under development. ON Semiconductor
reserves the right to change or discontinue this product without notice.
1
http://onsemi.com
QFN 16
MN SUFFIX
CASE 485G
MARKING DIAGRAM
PIN CONNECTIONS
XXXXX = Specific Device Code
A = Assembly Location
L = Wafer Lot
Y = Year
W = Work Week
G or G = Pb−Free Package
CCCCC = Country of Origin
XXXXX
ALYWG
CCCCC
MLD
CTresGN
CTbias
CTstim
CTresD
IDF
Supply
SCRdrv
GND
(Top View)
Device Package Shipping
†
NCS37005MNTWG QFN16 Tape & Reel
NCS37005MNG QFN16 Tube
ORDERING INFORMATION
NCS37005DARG TSSOP20 Tape & Reel
NCS37005DAG TSSOP20 Tube
1
†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.
1
16
TSSOP 16
DA SUFFIX
CASE 948F
