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KA2803BD Datasheet

  • KA2803BD

  • Earth Leakage Detector

  • 12頁

  • FAIRCHILD

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www.fairchildsemi.com
KA2803B
Earth Leakage Detector
Features
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Low Power Consumption P
D
=5mW, 100V/200V
Built-in Voltage Regulator
High Gain Differential Amplifier
0.4mA Output Current Pulse to Trigger SCR' S
Low External Part Count
DIP Package (8-DIP), High Packing Density
High Noise Immunity, Large Surge Margin
Super Temperature Characteristic of Input Sensitivity
Wide Operating Temperature Range (T
A
= -25擄C ~
+80擄C)
鈥?Operation from 12 to 20V Input
Description
The KA2803B is designed for use in earth leakage circuit
interrupters, for stable operation of the AC line in breakers.
The input of the differential amplifier is connected to the
secondary coil of ZCT(Zero Current Transformer). The
amplified output of differential amplifier is integrated at
external capacitor to gain adequate time delay that is
specified in KSC4613. The level comparator generates high
level when earth leakage current is greater than the fixed
level.
8-DIP
Functions
鈥?Differential Amplifier
鈥?Level Comparator
鈥?Latch Circuit
1
8-SOP
1
Block Diagram
8
V
CC
7
O
S(Output)
6
N
R
5
S
C
Bias Voltage
Internal
Internal
Bias
Zener
Zener
Protect
Reference
Voltage
Generator
Reference
+
Latch
Latch
Circuit
+
-
Circuit
Voltage
1
V
R
2
V
I
3
GND
4
O
D
Rev. 1.0.4
漏2002 Fairchild Semiconductor Corporation

KA2803BD 產(chǎn)品屬性

  • 8,100

  • 集成電路 (IC)

  • PMIC - 電源管理 - 專用

  • -

  • 接地漏電檢測器

  • 400µA

  • 12 V ~ 20 V

  • -25°C ~ 80°C

  • 表面貼裝

  • 8-SOIC（0.154"，3.90mm 寬）

  • 8-SOP

  • 管件

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