KA2803BDTF ON Semiconductor

Earth Leakage Detector KA2803 Description The KA2803 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 www.onsemi.com 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 8 Low Power Consumption: 5 mW, 100 V/200 V 1 Built-in Voltage Regulator SOIC8 PDIP8 High-gain Differential Amplifier CASE 751EB CASE 62605 0.4 mA Output Current Pulse to Trigger SCRs Low External Part Count MARKING DIAGRAM SOP Package, High Packing Density High Noise Immunity, Large Surge Margin Super Temperature Characteristic of Input Sensitivity Wide Operating Temperature Range: Y&Z&2&K Y&Z&2&K 2803X KA2803B T =25C to +80C for KA2803B and KA2803BDTF A T = 25C to +100C for KA2803CDTF A Operation from 12 V to 20 V Input Functions Y = ON Semiconductor Logo Differential Amplifier &Z = Assembly Plant Code Level Comparator &2 = Data Code (Year & Week) &K = Lot Latch Circuit KA2803B or 2803X = Specific Device Code X = B or C ORDERING INFORMATION See detailed ordering and shipping information on page 10 of this data sheet. Semiconductor Components Industries, LLC, 2016 1 Publication Order Number: August, 2020 Rev. 7 KA2803/DKA2803 BLOCK DIAGRAM Figure 1. Block Diagram PIN CONFIGURATION VR 1 8 VCC VI OS 2 7 GND 3 6 NR 3 3 OD 4 5 SC Figure 2. Pin Assignment PIN DESCRIPTION Pin No. Name Description 1 VR Non inverting input for current sensing amplifier 2 VI Inverting Input for current sensing amplifier 3 GND Ground 4 OD Output of current sensing amplifier 5 SC Input of latch circuit 6 NR Noise absorption 7 OS Gate drive for external SCR 8 VCC Power supply input for KA2803 circuitry www.onsemi.com 2