M54124L Renesas Electronics Corporation., M54124L Datasheet

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M54124L

Manufacturer Part Number
M54124L
Description
Earth Leakage Current Detector
Manufacturer
Renesas Electronics Corporation.
Datasheet

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Part Number:
M54124L
Manufacturer:
MIT
Quantity:
20 000
M54124L
Earth Leakage Current Detector
Description
The M54124L is a semiconductor integrated circuit having amplifier functions for high-speed earth leakage breakers.
Features
Applications
Summary of Functions
This integrated circuit is used in the amplification unit of earth leakage breakers, and consists of a differential amplifier,
one-shot circuit, output circuit, and constant-voltage circuit. The secondary side of a zero-phase current transformer
(ZCT) which detects leakage currents is connected to both inputs of the differential amplifier. The signal amplified by
the differential amplifier is integrated by an external capacitor, and after obtaining a time delay satisfying the
characteristics of a high-speed earth leakage breaker as stipulated in JIS C 8371, is connected to the input of the one-
shot circuit. The one-shot circuit holds its output at "L" level until the input voltage reaches a prescribed level, and
when a leakage current above the prescribed level flows, generates an "H" one-shot pulse at the output, to drive a
thyristor connected to the output.
Rev.1.0, Sep.16.2003, page 1 of 9
Satisfies JIS C 8371 standards
Good temperature characteristic of input sense current
High input sensitivity (V
Fewer external components, for greater economy
Good stability with respect to noise, surges
Can be used at both 100 V and 200 V with low power consumption (P
8-pin SIP for high mounting density
Broad operating temperature range (Ta=-20 to 80°C)
High-speed earth leakage breaker
T
=6.5 mV)
d
=5 mW)
REJ03F0031-0100Z
Sep.16.2003
Rev.1.0

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M54124L Summary of contents

Page 1

... M54124L Earth Leakage Current Detector Description The M54124L is a semiconductor integrated circuit having amplifier functions for high-speed earth leakage breakers. Features Satisfies JIS C 8371 standards Good temperature characteristic of input sense current High input sensitivity (V =6.5 mV) T Fewer external components, for greater economy ...

Page 2

... M54124L Block Diagram Pin Configuration (Top view) Rev.1.0, Sep.16.2003, page ...

Page 3

... M54124L Explanation of Operation Operation is explained referring to the block diagram, an application example, and operation waveform diagrams. When a leakage current I occurs on the primary side of ZCT (the zero-phase current transformer), a leakage signal g voltage V appears in the secondary-side output, and is input to the input pin IN with the reference voltage pin reference ...

Page 4

... M54124L Absolute Maximum Ratings Symbol Quantity Is Power supply voltage I Power supply surge current S(SG) I Input current IN I Input pin current applied voltage input voltage applied voltage OS Pd Power consumption Topr Operating temperature Tstg Storage temperature Remarks: When not specified, voltages are expressed taking the circuit GND pin level and currents are expressed taking the direction of flow into the circuit to be positive (no sign given), and the direction flowing out to be negative (prepended with " ...

Page 5

... M54124L Electrical Characteristics Measurement conditions Symbol Quantity I Power supply current Trip voltage sine wave I OD sink current ODL source current ODH turn-on voltage MAH V MA turn-off voltage ...

Page 6

... M54124L Measurement Circuits (unless otherwise noted, C Rev.1.0, Sep.16.2003, page 0 0 100 , and diodes are equivalent to MD234 ...

Page 7

... M54124L Characteristic Curves Rev.1.0, Sep.16.2003, page ...

Page 8

... M54124L Application Circuit Example (High-speed earth leakage breaker using the M54124L) Rev.1.0, Sep.16.2003, page ...

Page 9

... M54124L Package Dimensions Rev.1.0, Sep.16.2003, page ...

Page 10

Sales Strategic Planning Div. Keep safety first in your circuit designs! 1. Renesas Technology Corp. puts the maximum effort into making semiconductor products better and more reliable, but there is always the possibility that trouble may occur with them. Trouble ...

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