U842B Просмотр технического описания (PDF) - Temic Semiconductors
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U842B Datasheet PDF : 12 Pages
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U842B
Interval Function with Park-Switch Feedback
During the relay activation time the wiper motor leaves
its park position and the park switch changes its potential
from VBatt to GND. After the relay is switched off the
wiper motor is supplied via the park switch until the park
position is reached again. The park switch changes its
potential from GND back to VBatt. With the park switch
connected to the park input (Pin 3) the interval pause t6
starts after the 25 ms debounce time (t7) is over (see
figures 5 and 6).
Wash
pump
M
R2
1.5 kΩ
INT
WASH
SETINT
VR1
1 kΩ
R3
1.5 kΩ
R4
10 kΩ
R5
47 kΩ
R6
10 kΩ
R11
360 Ω
R1
180 Ω
1
8
2
7
U842B
3
6
4
5
R7
1.5 kΩ
Wiper motor
M
R9
220 kΩ
C1
47 µF
C2
100 nF
Figure 5. Application circuit with park switch feedback
Park
Run
13289
VBatt
INT
t4
0V
t 4D
OUT VBatt
t5
0V
t6
t 4D
VBatt
PARK
0V
t8
ON
MOTOR
OFF
13302
Figure 6. Intermittent circuit function with park position feedback
TELEFUNKEN Semiconductors
Rev. A2, 03-Feb-97
5 (12)
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