KA2803 Leakage Detector Datasheet

KA2803 Datasheet, PDF, Equivalent


Part Number

KA2803

Description

Earth Leakage Detector

Manufacture

ON Semiconductor

Total Page 13 Pages
Datasheet
Download KA2803 Datasheet


KA2803
KA2803
Earth Leakage Detector
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
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: 5 mW, 100 V/200 V
Built-in Voltage Regulator
High-gain Differential Amplifier
0.4 mA Output Current Pulse to Trigger SCRs
Low External Part Count
SOP Package, High Packing Density
High Noise Immunity, Large Surge Margin
Super Temperature Characteristic of Input Sensitivity
Wide Operating Temperature Range:
TA=25°C to +80°C for KA2803B and KA2803BDTF
TA = 25°C to +100°C for KA2803CDTF
Operation from 12 V to 20 V Input
Functions
Differential Amplifier
Level Comparator
Latch Circuit
www.onsemi.com
8
1
SOIC8
CASE 751EB
PDIP8
CASE 62605
MARKING DIAGRAM
$Y&Z&2&K
KA2803X
$Y&Z&2&K
KA2803B
$Y = ON Semiconductor Logo
&Z = Assembly Plant Code
&2 = Data Code (Year & Week)
&K = Lot
KA2803B or KA2803X = 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
June, 2019 Rev. 6
1
Publication Order Number:
KA2803/D

KA2803
KA2803
BLOCK DIAGRAM
Figure 1. Block Diagram
PIN CONFIGURATION
VR 1
VI 2
GND 33
OD 4
8 VCC
7 OS
36 NR
5 SC
Figure 2. Pin Assignment
PIN DESCRIPTION
Pin No.
Name
1 VR
2 VI
3 GND
4 OD
5 SC
6 NR
7 OS
8 VCC
Description
Non inverting input for current sensing amplifier
Inverting Input for current sensing amplifier
Ground
Output of current sensing amplifier
Input of latch circuit
Noise absorption
Gate drive for external SCR
Power supply input for KA2803 circuitry
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2


Features KA2803 Earth Leakage Detector Descripti on The KA2803 is designed for use in ea rth leakage circuit interrupters, for o peration directly off the AC line in br eakers. The input of the differential a mplifier is connected to the secondary coil of Zero Current Transformer (ZCT). The amplified output of differential a mplifier is integrated at external capa citor 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: 5 mW, 100 V/200 V Built-in Voltage Regulator • High-g ain Differential Amplifier • 0.4 mA O utput Current Pulse to Trigger SCRs • Low External Part Count • SOP Packag e, High Packing Density • High Noise Immunity, Large Surge Margin • Super Temperature Characteristic of Input Sen sitivity • Wide Operating Temperature Range: TA=−25°C to +80°C for KA280 3B and KA2803BDTF TA = −25°C to +100 °C for KA2803CDTF • Operation from 12 V to 20 V Input Functions • Differential Amplifier.
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