U4790B Datasheet

IC型號(hào)：
U4790B
PDF描述：
Lamp Monitor
文件大?。?/label>
38.44KB
PDF頁數(shù)：
5頁
芯片廠家：
ETC

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U4790B

Automotive Lamp-Outage Monitor, V

= 8 mV, V

Z(3,5)

= 22V

Description

The bipolar IC U4790B is designed as a monitor for lamp

failure in automobiles. The comparator threshold is

matched to the PTC characteristic of incandescent lamps.

The threshold is tied to a typical value of V

4,6

= V

鈥?V

where V

= 8 mV.

If the voltage drop across shunt resistor, R

, exceeds

8 mV, the output is turned off, otherwise the output is

turned on. Without supply voltage or open input Pin 8, the

output is turned off. An unused comparator input must be

connected to Pin 7.

Features

10 kV鈥揈SD protection

Two comparators with common reference

Tight threshold tolerance

Threshold matched to PTC characteristic

of incandescent lamps

Temperature compensated

NPN output

Interference and damage鈥損rotection

according to VDE 0839

EMI protection

Reversal polarity protection

Load-dump protection

Block Diagram

鈥?/div>

0.6 V

鈥?/div>

95 10606

Batt

5 OUT1

3 OUT2

Lamps

150

Figure 1. Schematic and application circuit

Ordering Information

Extended Type Number

U4790B

Package

DIP8

Remarks

Rev. A3, 09-Apr-01

1 (5)

型號(hào)

版本

描述

廠商

下載
U479B

英文版

Automotive Lamp Outage Monitor, VT = 8 mV

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U4790B Datasheet

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