Datasheet > U4790B

U4790B

更新时间： 2024-11-01 23:38:43

品牌	Logo	应用领域
其他 - ETC		光电二极管监控
页数	文件大小	规格书
5页	38K
描述
Lamp Monitor

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U4790B 数据手册

U4790B

Automotive Lamp-Outage Monitor, V_T= 8 mV, V_Z(3,5)= 22V

Description

The bipolar IC U4790B is designed as a monitor for lamp If the voltage drop across shunt resistor, R , exceeds

failure in automobiles. The comparator threshold is 8 mV, the output is turned off, otherwise the output is

matched to the PTC characteristic of incandescent lamps. turned on. Without supply voltage or open input Pin 8, the

The threshold is tied to a typical value of V = V – V

output is turned off. An unused comparator input must be

connected to Pin 7.

4,6

where V = 8 mV.

F_De₁a₀tu_kVr_–e_Es_{SD protection}

D NPN output

D Two comparators with common reference

D Tight threshold tolerance

D Interference and damage–protection

according to VDE 0839

D EMI protection

D Threshold matched to PTC characteristic

of incandescent lamps

D Reversal polarity protection

D Load-dump protection

D Temperature compensated

Block Diagram

V_S

V_Batt

R_sh

Z₂

OUT1

–

Z₅

R_sh

0.6 V_S

–

OUT2

Z₃

95 10606

Lamps

R₁

150 W

Figure 1. Schematic and application circuit

Ordering Information

Extended Type Number

Package

DIP8

Remarks

U4790B

Rev. A3, 09-Apr-01

1 (5)

12 3 4 5

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