M54125P
DESCRIPTION
The M54125 is a semiconductor integrated circuit consisting of an amplifier for high-speed earth leakage circuit breaker.
PIN CONFIGURATION (TOP VIEW)
Capacitor MM → ← 1
FEATURES q Satisfies JIS C 8371 q Temperature-stable input current trigger threshold (VLKT = 9m V) q Capable of detecting a lost phase on the neutral line q Economical, low external ponent count q Highly resistant to noise and power surges q Wide operating temperature range (Ta = -20
- +80°C)
Output OUT ← 2 GND NC Capacitor CTD 3 4
← 5 TD →
NC 6
M54125L
Capacitor CWF Input
← 7 WF →
IBL → 8 RX → 9 NC 10 11 12
APPLICATION
High-speed earth-leakage circuit breakers
External resistor
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...
