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M54124L 参数 Datasheet PDF下载

M54124L图片预览
型号: M54124L
PDF下载: 下载PDF文件 查看货源
内容描述: 漏电保护器 [Earth Leakage Current Detector]
分类和应用: 电源电路电源管理电路
文件页数/大小: 10 页 / 272 K
品牌: RENESAS [ RENESAS TECHNOLOGY CORP ]
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M54124L
Earth Leakage Current Detector
REJ03F0031-0100Z
Rev.1.0
Sep.16.2003
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
T
=6.5 mV)
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
d
=5 mW)
8-pin SIP for high mounting density
Broad operating temperature range (Ta=-20 to 80°C)
Applications
High-speed earth leakage breaker
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