U2400B 查看數據表（PDF） - Temic Semiconductors
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U2400B Datasheet PDF : 15 Pages
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U2400B
Clock generator
Timer clock can be realised either by the internal 200 Hz
oscillator or with mains sync. of 50 Hz. In addition to that,
an external timer clock input via Pin 16 (figure 8) is
possible.
a) 200-Hz oscillator
Figure 6 shows the typical circuit for 200 Hz
oscillator. C1 is meant for ripple smoothing of the
mains supply.
+V S
1
8
+ Ǹǒ Ǔ ) The dimensioning of the circuit is given below.
Zsync
2
p1
2
f Csync
R 2 sync
where f = mains frequency
w + Zsync(min)
2 V^sync
Isync
2 Vsync(peak)
10 mA
v + m Zsync(max)
0.8 V
I sync(min)
0.8 V
30 A
+ m + W i.e., Csync 0.15 F; Rsync 15 k
7
C1
430 kW
R1
15 nF
3
C2
11
94 9380
Figure 6. 200-Hz oscillator
b) Mains synchronisation
Mains synchronisation is shown in figure 7.
1
Csync
Rsync
Zsync
Mains
Vsync Isync
BYX 86 +VS 8
D1
C1
3,11
c) External timer clock input
For a fixed internal timing (battery contact moni-
toring, flashing frequency red/ green), an
oscillator frequency of 200 Hz is necessary.
There is a possibility of mains synchronisation
via Pin 1. In case of mains synchronisation, the
oscillator must be separated from the clock logic
(Pin 14 connected to VRef).
+VS
1)
BZX
83/C15
C MOS
Clock
1) generator
1) for VS > 15 V
1,8
C1
16
18 kW
7
R1
3
C2
11
94 9382
Figure 7. Mains synchronisation
94 9381
Figure 8. External timer clock input, Pin 16 for different
charging times
6 (15)
TELEFUNKEN Semiconductors
Rev. A1, 21-Nov-96
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