Self-Test Appliance Leakage Circuit Interrupter (ALCI)
NCS37020
The NCS37020 is an UL943B compliant signal processor for...
Self-Test Appliance Leakage Circuit Interrupter (ALCI)
NCS37020
The NCS37020 is an UL943B compliant signal processor for ALCI applications with self−test. The device integrates a 12 V shunt power supply, tiered differential fault detection and self−test per the UL943B standard. Self−test is monitored at start up and every 12 minutes.
Features
Meets UL943B Self−test ALCI Requirements 12 V Shunt
Regulator Precision Bandgap 3.3 V LDO Linear
Regulator CT Sense Amplifier VOS Dynamic Cancellation Oscillator Frequency Trimmed to AC Input Tiered GF Trip Times Built−In Noise Filter LED EOL Indicator SCR Gate Driver Adjustable Sensitivity Minimum External Components Low Quiescent Current 14 Pin TSSOP Package
Typical Applications
Personal Care Products Non Grounded Neutral Electrical Outlets, Circuit Breakers and
Power Cords Requiring Ground Fault Safety Features
ALCI and RCCB Circuits
DATA SHEET www.onsemi.com
14
1 TSSOP−14 CASE 948G
MARKING DIAGRAM
14 NCS 37020
ALYWG
1
A = Assembly Location L = Wafer Lot Y = Year W = Work Week G = Pb−Free Package
SCR Test CTB CTS CTO IDF REF GND
PIN CONNECTIONS 1
SCR Fault Test TE LED AUX SUP Phase
(Top View)
ORDERING INFORMATION
Device NCS37020DTBR2G
Package
TSSOP−14 (Pb−Free)
Shipping†
2500 / Tape & Reel
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D.
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