U643 - Flasher/ 30-mohm Shunt

Datasheet Summary

Description

The bipolar integrated circuit U643B is used in relaycontrolled automotive flashers where a high-level EMC is required.

Lamp outage is indicated by frequency doubling during hazard warning as well as direction mode.

Features

D Temperature and supply voltage compensated flashing frequency D Frequency doubling indicates lamp outage D Relay driver output with high current carrying capacity and low saturation voltage D Minimum lamp load for flasher operation: ≥ 1 W D Very low susceptibility to EMI D Protection according to ISO/TR 7637/1 level 4 Block Diagram + VS + 49 6 C1 4 Measuring comparator K 1 V6.
81 mV 20 kW K1 2 R3 Shunt 5 kW 7 30 mW K2 R1 Pulse generator 3 49 a.
Comparator K2 20 kW 49 a.

ATMEL Corporation

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Datasheet Details

Part number	U643
Manufacturer	ATMEL Corporation
File Size	57.77 KB
Description	Flasher/ 30-mohm Shunt
Datasheet	U643 Datasheet
Additional preview pages of the U643 datasheet.

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Full PDF Text Transcription

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U643B Flasher, 30-mW Shunt Description The bipolar integrated circuit U643B is used in relaycontrolled automotive flashers where a high-level EMC is required. Lamp outage is indicated by frequency doubling during hazard warning as well as direction mode.

Published: Apr 16, 2005 |