M54125L View Datasheet(PDF) - Renesas Electronics

Part Name

Description

Manufacturer

M54125L

Earth Leakage Current Detector

Renesas Electronics 

M54125L

Earth Leakage Current Detector

REJ03F0033-0100Z

Rev.1.0

Sep.16.2003

Description

The M54125L is a semiconductor integrated circuit having the functions of an amplifier for use with high-speed

ground-fault breakers.

Features

• Satisfies JIS C 8371

• Good temperature characteristic of the input sense current (VLKT = 9 mV)

• Internal neutral line open-phase (N open) detection function

• Few external components

• Good stability with respect to noise, surges

• Broad operating temperature range (Ta = –20 to 80°C)

Applications

• High-speed ground-fault breakers

Summary of functions

The M54125L is an integrated circuit used in the amplification unit of a high-speed ground-fault breaker, and consists

of a differential amplifier, one-shot circuit, output circuit, constant-current circuit, waveform-shaping circuit, and delay

circuit. Operation is explained below, based on the block diagram, application example, and operating waveforms.

Block diagram

Rev.1.0, Sep.16.2003, page 1 of 10

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