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V(line)*V(timing)
Vline
line
timing
V1
V2
V2 timing 0 PWL 0 0.2 3s 1 7s 1 10s 0.2
V1 line 0 SIN 0 150 50
200
16.0
100
12.0
0
8.0
−100
4.0
−200
2
B1
Voltage
IN
3
bulk
Rupper
2.4Meg
Cfil
Rlower
220n
10k
A simple simulation configuration helps to tailor the right value for Cfil
Turn− off voltage occurs at:
VinRMS = 72.3 volts
0
8.156
8.175
Typical signals obtained from the simulator
http://onsemi.com
NCP1239
bulk
+
Cbulk
Bload
47uF
Current
IC = 40
V(CMP) > 3, 35/V (bulk) : 0
−
PSpice:
EBload Value = { IF ( V(CMP)>3, 35/V(bulk), 0) }
cmp
+
BrownOut
−
5
Bbrown
Voltage
V(CMP) > 3, 250m : 500m
PSpice:
EBbrown Value = { IF ( V(CMP) > 3, 250m, 0) }
Figure 46.
Vbrown− out
8.195
8.215
Figure 47.
27
VBulk
8.235
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