M54125L 데이터 시트보기 (PDF) - MITSUBISHI ELECTRIC

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M54125L

EARTH LEAKAGE CURRENT DETECTOR

MITSUBISHI ELECTRIC  

MITSUBISHI <CONTROL / DRIVER IC>

M54125L/P

EARTH LEAKAGE CURRENT DETECTOR

DESCRIPTION

The M54125 is a semiconductor integrated circuit consisting of an

amplifier for high-speed earth leakage circuit breaker.

FEATURES

q Satisfies JIS C 8371

q Temperature-stable input current trigger threshold (VLKT = 9mV)

q Capable of detecting a lost phase on the neutral line

q Economical, low external component count

q Highly resistant to noise and power surges

q Wide operating temperature range (Ta = -20 – +80°C)

APPLICATION

High-speed earth-leakage circuit breakers

FUNCTION

The M54125 is a semiconductor integrated circuit for use in the

amplifier section of earth-leakage circuit breakers. It consists of a

differential amplifier, one-shot circuit, output circuit, current

regulator, waveform regulator and delay circuit. The following

description refers to the block diagram, application example, and

operational waveforms.

PIN CONFIGURATION (TOP VIEW)

Capacitor MM →← 1

Output OUT ← 2

GND 3

NC 4

Capacitor CTD TD →← 5

NC 6

Capacitor CWF WF →← 7

Input IBL → 8

External resistor RX → 9

NC 10

NC 11

VS 12

Input ILK → 13

Bias voltage VB 14

Outline 14P5A

N.C: no connection

Input ILK → 1

Bias voltage VB 2

Capacitor MM →← 3

Output OUT ← 4

GND 5

10 VS

9 ← RX External resistor

8 ← IBL Input

7 →← WF Capacitor CWF

6 →← TD Capacitor CTD

Outline 10P2-C

BLOCK DIAGRAM (Note: Pin No. in parentheses are of M54125L)

VS

10

(12)

External

resistor

RX

9

(9)

Input

IBL

8

(8)

Capacitor CWF

WF

7

(7)

Capacitor CWF

TD

6

(5)

Voltage

regulator

Bias

current

source

Comparator

VBLT

Wave-

form

regulator

VCC

VB

A • VLKT

A

Amplifier

Comparator

One-shot

multi vibrator

(13) (14)

1

2

ILK VB

Input Bias

M54125L/P

(1)

3

MM

Capacitor

Delay

circuit

Output

circuit

(2)

4

OUT

Output

(3)

5

GND

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