DESCRIPTION

The MA2803 is designed for use in earth leakage circuit

interrupters, for operation directly off the AC line in breakers. The

input of the differential amplifier is connected to the secondary coil of

Zero Current Transformer (ZCT). The amplified output of differential

amplifier is integrated at external capacitor to gain adequate time

delay. The level comparator generates a high level when earth

leakage current is greater than the fixed level.

FEATURES

* Low Power Consumption: 5mW, 100V / 200V

* Built-in Voltage Regulator

* High-gain Differential Amplifier

* 0.4mA Output Current Pulse to Trigger SCRs

* Low External Part Count

* High Noise Immunity, Large Surge Margin

* Super Temperature Characteristic of Input Sensitivity

* Wide Operating Temperature Range: TA = −25°C to +80°C

* Operation from 12V to 20V Input