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M54123L - EARTH LEAKAGE CURRENT DETECTOR

General Description

The UTC M54123L is a semiconductor integrated circuit with amplifier for a high-speed earth leakage circuit breaker.

For the amplifying parts of earth leakage circuit breaker, the UTC M54123L consists of differential amplifier, latch circuit and voltage regulator.

Key Features

  • With good input sensitivity current temperature characteristics.
  • High input sensitivity :VT=6.1mV (Typ. ).
  • Only need low external component count.
  • High noise and surge-proof.
  • Low power dissipation :PD=5mW (Typ. ).
  • May be used both as 100V and 200V.
  • Wide temperature range : from -20 °C to +80°C.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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UNISONIC TECHNOLOGIES CO., LTD M54123L LINEAR INTEGRATED CIRCUIT EARTH LEAKAGE CURRENT DETECTOR SOP-8  DESCRIPTION The UTC M54123L is a semiconductor integrated circuit with amplifier for a high-speed earth leakage circuit breaker. For the amplifying parts of earth leakage circuit breaker, the UTC M54123L consists of differential amplifier, latch circuit and voltage regulator. In normal operating, the UTC M54123L should be connected to the secondary side of the ZCT (zero current transformers). Here the ZCT detects leakage current different amplifiers’ both input. Then the signals which have been amplified are integrated by an external capacitor.