ncp1239f ON Semiconductor, ncp1239f Datasheet - Page 27

• Manufacturer Part Number: ncp1239f
• Description: Lowstandby High Performance Pwm Controller
• Manufacturer: ON Semiconductor

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