U842B
Interval Function with Park-Switch Feedback
During the relay activation time the wiper motor leaves potential from GND back to V . With the park switch
Batt
its park position and the park switch changes its potential connected to the park input (Pin 3) the interval pause t
6
from V
to GND. After the relay is switched off the starts after the 25 ms debounce time (t ) is over (see
Batt
7
wiper motor is supplied via the park switch until the park figures 5 and 6).
position is reached again. The park switch changes its
Wiper motor
Park
Run
R2
1.5 kΩ
R3
1.5 kΩ
R1
180 Ω
Wash
pump
M
M
R4
1
2
3
4
8
7
6
5
INT
10 kΩ
R5
WASH
47 kΩ
R6
U842B
R9
SETINT
VR1
10 kΩ
R11
220 kΩ
360 Ω
1 kΩ
C1
C2
100 nF
R7
47 µF
1.5 kΩ
13289
Figure 5. Application circuit with park switch feedback
V
V
Batt
t
INT
4
0V
t
4D
Batt
OUT
t
5
t
6
0V
t
4D
V
Batt
PARK
t
0V
8
ON
MOTOR
OFF
13302
Figure 6. Intermittent circuit function with park position feedback
TELEFUNKEN Semiconductors
5 (12)
Rev. A2, 03-Feb-97
TEMIC [ TEMIC SEMICONDUCTORS ]
