M54123

【】 　■DESCRIPTION 　The M54123 is a semiconductor integrated circuit with amplifier 　for a high-speed earth leakage circuit breaker. 　■FEATURES 　Good temperature characteristics of input sensitivity current 　High input sensitivity (VT=6.1mV Typ.) 　Low external component count 　High noise and surge-proof 　Low power dissipation (Pd=5mW Typ.) and may be used both　as 100V and 200V. 　High mounting density by SIL package with 8 pins 　Wide temperature range (TA=-20℃~+80℃) 　■APPLICATION: High speed earth leakage circuit breaker 　■FUNCTION 　The M54123 circuit for the amplifying parts of earth leakage 　circuit breaker consists of differential amplifier, latch circuit and 　voltage regulator. It is connected to the secondary side of the zerocurrent 　transformer (ZCT) which detects leakage current in the 　both input of the differential amplifier. Signals amplified by 　differential amplifier are...