U842B - Wiper Controller

Datasheet Summary

Description

The U842B circuit is designed as an interval and wipe/ wash timer for automotive wiper control.

The interval pause can be set in a range from 3 s to 11 s by an external 1-kW potentiometer.

Wipe/wash mode has priority over the interval mode.

Features

D Interval input: low side D Wipe/ wash input: low side D Park input: high side (park position) D Output driver protected against short circuit D All time periods determined by RC oscillator D Fixed relay activation time of 500 ms D Adjustable interval pause from 3 s to 11 s D Fixed pre-wash delay of 400 ms D Dry wiping.
With park switch signal: 3 cycles.
Without park switch signal: 2.8 s D Inputs INT, WASH and PARK digitally debounced D All inputs with integrated RF protectio.

TEMIC Semiconductors

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Datasheet Details

Part number	U842B
Manufacturer	TEMIC Semiconductors
File Size	264.49 KB
Description	Wiper Controller
Datasheet	U842B Datasheet
Additional preview pages of the U842B datasheet.

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Full PDF Text Transcription

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U842B Wiper Control for Intermittent and Wipe/ Wash Mode Description The U842B circuit is designed as an interval and wipe/ wash timer for automotive wiper control. The interval pause can be set in a range from 3 s to 11 s by an external 1-kW potentiometer. Wipe/wash mode has priority over the interval mode. The U842B controls the wiper motor with/without park switch signal. The integrated relay driver is protected against short circuits and is switched to conductive condition in the case of a load-dump. With only a few external components, protection against RF interference and transients (ISO/TR 7637-1/3) can be achieved.

Published: Apr 16, 2005 |