NCS37000 Datasheet, PDF (1/8 Pages) ON Semiconductor – Ground Fault Circuit Interrupter (GFCI)

NCS37000
Ground Fault Circuit
Interrupter (GFCI)
Description
The NCS37000 is a fully UL943 compliant signal processor for
GFCI applications. 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.
Features
• 6.0 – 12 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 or 20 Pin TSSOP Package
• Single Current Transformer (CT) Detection of both Differential and
Grounded−Neutral Faults
• 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 use with High Igt SCR’s for Improved Noise
Immunity
• 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 GFCI Breakers
• GFCI Receptacles
• In−line GFCI Circuits (power cords)
http://onsemi.com
1
20
QFN16
MN SUFFIX
TSSOP−20
DA SUFFIX
1
CASE 485G
CASE 948E
MARKING DIAGRAMS
37000
MNG
ALYW
G
3700
0DBG
ALYWG
A
= Assembly Location
L
= Wafer Lot
Y
= Year
W
= Work Week
G
= Pb−Free Package
PIN CONNECTIONS
1
MLD
CTresGN
CTbias
CTstim
GND
(Top View)
ORDERING INFORMATION
Device
Package
Shipping^†
NCS37000MNTWG _QFN16 2500/Tape & Reel
NCS37000MNG ^{(Pb−Free)} 120 Units / Tube
NCS37000DBRG
NCS37000DBG
TSSOP20 ^{2500/Tape & Reel}
(Pb−Free) _{74 Units / Tube}
†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, 2012
1
December, 2012 − Rev. 0
Publication Order Number:
NCS37000/D