U641B small printed circuit board Interval and Wipe / Wash Wiper Control IC with Delay

Features

• Interval Pause: 4s to 20s

• After-wiping Time: 2s to 20s

• Wiper Motor’s Park Switch

• 0.6s Prewash Delay

• Wipe/Wash Mode Priority

• One External Capacitor Determines All Time Sequences

• Relay Driver with Z-diode

• Interference Protection According to VDE 0839 or ISO/TR 7637/1

• Load-dump Protected

Description

The U641B is a bi-polar integrated circuit designed for the wiper application in the automotive market. It includes wipe, wash and internal mode.

Functional Description

As a convenience feature of the windshield wiper, intermittent and wipe/wash operation functions are implemented in most of the automobiles. The U641B is a costeffective solution for an accurate timing function control. Wipe/wash mode has priority over interval mode. Interval pause and after-wiping time can be set to fixed values by using resistors in a broad time range. Added value can be provided with an individual, continuous adjustment of the interval pause by a potentiometer which may be built into the stalk. For proper operation, it is mandatory to feed the signal of the wiper motor's park switch into the U641B.

Figure 2-1. Block Diagram

STOCK LIST

           King--- Originator of ANTERWELL, engaged in the IC electronics industry in 1998 and establish ANTERWELL in 2004. The company is located in Shenzhen Huaqiang North, the largest electronic center in Asia. Our main business is the technical development and electronic products import and export business. Currently, we have branches in Hong Kong and Malaysia.

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