U6433B-FP 데이터 시트보기 (PDF) - Temic Semiconductors

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U6433B-FP

Flasher, 18-m
Shunt, Frequency Doubling Disabling

Temic Semiconductors 

U6433B

Flasher, 18-mW Shunt, Frequency Doubling Disabling

Description

The design of the U6433B is similar to that of U6043B,

both devices have the same excellent EMC (Electro

Magnetic Capability) and protection features. The

U6433B includes an additional 8-mV comparator and a

logical connection with the frequency doubling stage.

This combination can be used for a hazard switch which

Features

D Temperature and voltage compensated frequency

D Warning indication of lamp failure by means of

frequency doubling can be disabled

D Voltage dependence of the car indicator lamps

compensated for lamp failure

D Relay output with high current carrying capacity

bypasses the external shunt resistor to disable the

frequency doubling. This feature is especially important

with respect to the US automotive industry. During

direction mode the U6433B works like other flashers, i.e.,

frequency doubling in the case of lamp outage.

and low saturation voltage

y D Minimum lamp load for flasher operation 1 W

D Load-dump protection

D Very low susceptibility to EMI

D Protection according to ISO/TR 7637/1 level 4

Ordering Information

Extended Type Number

U6433B–FP

Block Diagram

Package

SO8

Remarks

49 a

PL>1 W

6

C1

4.7 mF

R1 4

82 kW

5

+–K5

G4

G5

+

K1–

VS – 49 mV

K4+–

VS – 8 mV

G2

VS – 4 V

K2

VS–6 V

Shunt

VS

W R3

18 m

K3

VS – 8 V

3

7

8

R2

1.5 kW

Figure 1. Application circuit as a car flasher

2 VS

D1

23 V

1

R4

470

W

94 9289

Rev. A3, 07-Jun-99

1 (5)

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