NCP1239
Vbulk
Rbo1
to PFC_V
CC
OVP REF5V
+
V
out
1
2
3
4
16
15
14
13
12
11
10
9
NTC
REF5V (5V/10mA)
Thermistor
GND
V
CC
+
Cbulk
BO
5
6
7
8
Rramp
Rbo2
Rcomp
NCP1239F
Rt
+
Cbo
Css
GND
Figure 1. NCP1239F Typical Application Example
Vbulk
Rbo1
to PFC_V
D3
L2
CC
OVP REF5V
+
V
out
D4
1
2
3
4
16
15
14
13
12
11
10
9
NTC
REF5V (5V/10mA)
Thermistor
GND
V
CC
+
Cbulk
BO
5
6
7
8
Rramp
Rbo2
NCP1239V
Rt
Rdmax
+
Cbo
Css
GND
Figure 2. NCP1239V Typical Application Example
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