U690B

Rev. A2, 28-Apr-97

()

Block Diagram

Stabilization

Power-on-Reset

Load-dump detection

Debouncing

Oscillator

Frequency comparator

GND

Relay

output

94 9297

Relay output

Logic

OSC

6

78

1 k

W

10 nF

360 k

W

47

mF

1

2

Signal

input

3

Program

input

5

Retrigger

input

4

56 k

W

1 nF

1 k

W

130 k

W

L

Hyst

180 k

W

15

53

Water

pump

15

Wiper

motor

Figure 1. Application circuit for rear wiper interval/wipe-wash control

Functional Description

Power Supply, Pin 8

For reasons of interference protection and surge immu-

nity, the supply voltage (Pin 8) must be provided with an

smoothes the supply voltage at Pin 8.

An integratd Z-diode (7.3 V) generates the stabilized

(Terminal 15).

U690B

12

6

5

8

7

3

4

Relay

94 8868

15

1 k

W

R1

47 F/10 V

C1

R2

C2

m

Figure 2. Basic circuitry