FM2141 Shanghai Fudan Microelectronics Co., Ltd., FM2141 Datasheet - Page 3

• Manufacturer Part Number: FM2141
• Description: Fm2141 Gfci Low Power Ground Fault Interrupter
• Manufacturer: Shanghai Fudan Microelectronics Co., Ltd.

Product Overview
Introduction
Features
FM2141 Low Power Ground Fault Interrupter
FM2141 is a low power controller for AC receptacle ground fault circuit interrupters. The devices
detect hazardous current paths to ground and ground to neutral faults. The circuit interrupter then
disconnects the load from the line before a harmful or lethal shock occurs.
FM2141 contains a diode rectifier, shunt regulator, precision sense amplifier, current reference, time
delay circuit and SCR driver internally. Two sense transformers, SCR, solenoid, three resistors and
four capacitors complete the design of the basic circuit interrupter.
The simple layout and minimum components insure ease of application and long term reliability.
Features not found in other GFCI controllers include a low offset voltage sense amplifier eliminating
the need for a coupling capacitor between the sense transformer and sense amplifier, and an
internal rectifier to eliminate high voltage rectifying diodes.
FM2141 is powered only during the positive half period of the line voltage, but can sense current
faults independent of its phase relative to the line voltage. The gate of the SCR is driven only during
the positive half cycle of the line voltage.
Powered from the AC line
Built-in rectifier
Direct interface to SCR
500
Precision sense amplifier
Adjustable time delay
Minimum external components
Meets UL 943 requirements
For use with 110V or 220V systems
Available in 8 pin SOP or DIP package
µ
A quiescent current
Ver 1.0
Specification
3