FM2145 Shanghai Fudan Microelectronics Co., Ltd., FM2145 Datasheet - Page 3

• Manufacturer Part Number: FM2145
• Description: Low Power Ground Fault Interrupter
• Manufacturer: Shanghai Fudan Microelectronics Co., Ltd.

Product Description
Description
Features
Pin Assignments
Pin Function
FM 2145 Low power Ground Fault Interrupter
The FM2145 is a low power controller for AC outlet ground fault interrupters. Contained internally
are a 26V zener shunt regulator, an op amp, and an SCR driver. With the addition of two sense
transformers, a bridge rectifier, an SCR, a relay, and a few additional components, the FM2145
will detect and protect against both hot wire to ground and neutral wire to ground faults.
Pin
1
2
3
4
5
6
7
8
No potentiometer required
Direct interface to SCR
Supply voltage derived from AC line
—26V shunt
Adjustable sensitivity
Op Amp Output
SCR Trigger
Symbol
+Input
GND
V
+V
V
NC
REF
FB
S
Operational Amplifier-input
Operational Amplifier + input
Reference Voltage
Ground
SCR trigger
Neutral
Operational Amplifier output
Not connected
Ver 2.1
Grounded neutral fault detection
Meets U.L. 943 standards
450µA quiescent current
Ideal for 120V or 220V systems
Functions
Specification
3