© Semiconductor Components Industries, LLC, 2012

December, 2012 − Rev. 0

1

Publication Order Number:

NCS37000/D

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

series impedance)

Grounded−Neutral Faults

Guarantee Full Resolution on 50 and 60 Hz Distribution Systems

mains zero crossings)

Interactions on the AC Mains

Immunity

Loss of Detection Capability or CT Saturation

Compliant

Typical Applications

1

http://onsemi.com

QFN16

MN SUFFIX

CASE 485G

MARKING DIAGRAMS

PIN CONNECTIONS

A

= Assembly Location

L

= Wafer Lot

Y

= Year

W

= Work Week

G

= Pb−Free Package

37000

MNG

ALYW

G

MLD

CTresGN

CTbias

CTstim

GND

(Top View)

Device

Package

NCS37000MNTWG

QFN16

(Pb−Free)

2500/Tape & Reel

NCS37000MNG

120 Units / Tube

ORDERING INFORMATION

NCS37000DBRG

TSSOP20

(Pb−Free)

2500/Tape & Reel

NCS37000DBG

74 Units / 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

20

TSSOP−20

DA SUFFIX

CASE 948E

3700

0DBG

ALYWG