U6046B Datasheet, PDF (5/11 Pages) TEMIC Semiconductors – Rear Window Heating Timer

U6046B / U6047B
W ^{Figure 11 shows the input circuit of U6047B. It has an}
integrated pull-up resistance (100 k ), RF capacitor
(15 PF) and Z-diode (7 V). The circuit reacts to voltages
less than 2 V. The external protective resistance has a
W value of 2 k and the push-button switch is connected to
GND. Contact current, I, is calculated as follows:
[ ₎ + _{W W} I
V_S
(100 k 2 k )
when V_Batt
12 V
[I 0.1 mA
W It can be increased by connecting a 5.6 k resistor from
the push-button-switch to V_Batt as shown in figure 19.
The connecting diodes prevent the current flow to the
input of the Z-diodes when the rocker actuated-switch is
in open-state (current-consumption only in
standby-mode). If necessary, these diodes can be omitted.
Timing Waveform
Diagram 5A
Toggle
Relay ^t3
t₃
t₃
Diagram 5B
ON
OFF
t₃
Relay
t₃
t₃
Diagram 5C
ON
OFF
t₃
t₃
t₃
t₃
t₃
t₃
t₃
t_d
t₃
t_{3 td}
Pin 5
Pin 2
Pin 3
Pin 4
Pin 2
Pin 3
Pin 4
Relay
t_d
t₃
Figure 9. Behavior of the relay control output as a function of input condition
Pin 2
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VBatt
S R ^{Pin 3,4,5}
20 kW
7V
2V
–
+
15 pF
20 kW
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Figure 10. Input circuit U6046B
TELEFUNKEN Semiconductors
Rev. A2, 03-Feb-97
V_S
100 kW
Pin 3,4,5
2 kW
7V
2V
–
+
15 pF
Figure 11. Input circuit U6047B
94 8757
5 (11)