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| U2100B Datasheet, PDF (7/14 Pages) TEMIC Semiconductors – Timer Control for Triac and Relay | |||
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U2100B
3.4 αmin Operation
Selection condition (Figure 3-5):
âV4 = 6.5 to 7.8V, +V4 = internal limitation
Rαmax
=
Rsync
--------------3---.--6-----V----------------
VR(peak) â 3.6 V
Rαmin
=
Rsync
---------------1---0-----V-----------------
VM Ã 2 â 10 V
VR(peak) is the peak voltage of the remaining phase angle, which should be high enough to gener-
ate the supply voltage, VS.
Figure 3-5. αmin Operation (Two-wire Operation)
D1
2
IN 4007 C0
R0
Z
-VS
L
C1
22 V
4
Sync
Rα
3
Output
1
GND
Rsync
1N4148
6.8 V
RG
IG
VM
230 V~
VR(peak)
N
C1
Co
Ro
Rsync
Rα
RG
D1
=
100 µF/35V
=
0.33 µF/250V ~
=
390â¦
=
220 kâ¦
=
10 kâ¦
=
390â¦
=
IN 4007
7
4769CâINDCOâ07/05
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