NCP1603 ON Semiconductor, NCP1603 Datasheet - Page 3

• Manufacturer Part Number: NCP1603
• Description: PFC/PWM Combo Controller
• Manufacturer: ON Semiconductor

Gnd2
V
FB2
CS2
Osc
FB1
CC1
CS1
11
4
3
8
5
2
9
18V
10V
9 V
25k
9V
9V
V
CS2
100 kHz
5ms Jittering
0~2.3V ramp
10V
I
V
0
FB1
18k
(9 / 10.5V)
I
S
FB2
Shutdown / UVP
(I
Softstart
UVLO
FB1
Current
55k
1V max
2.5 ms
Current
Mirror
1
Mirror
20k
45mA
94mA
< 8% I
200ns
LEB
5V
V
REF
5/ 3.5 V
1
SS
0.75V
)
3V
&
(I
+
−
FB1
(I
Zero Current
Overcurrent
0
(I
Standby
Protection
S
Overvoltage
+
Detection
−
S
Protection
+
−
Internal bias
> 203 mA)
> 107% I
< 14 mA)
Error
OVP
+
−
Figure 2. Functional Block Diagram
Regulator
clock
0.75V/ 1.25V
Voltage
when V
PWM
latchoff, reset
+
−
125 ms
REF
delay
S Q
R
)
http://onsemi.com
CC2
S
+
−
(140/165°C)
start_Vaux
Shutdown
Fault−2
Thermal
Q
R
OR
< 4V
NCP1603
Regulation Block
V
&
reg
96%I
Fault−1
3
125 ms
&
delay
ref
3.9V max
(95/140°C)
Shutdown
clamp
Thermal
S
Q
I
delay
5ms Jittering
ref
when V
Fault−2
Fault−1
Oscillator
latchoff, reset
I
R
100 kHz
OR
FB1
&
CC2
300k
Internal bias
initially
disable
Vaux
−
+
< 4V
OR
PFC
Modulation
&
&
R
1
0
start_Vaux
R
S Q
Max duty
(12.6 / 7.7V)
R
S
V
= 80%
(5.6 / 4V)
+
−
CC2
1
C
V
ton
1
S
R Q
Q
R
when V
mgmt
2
R
1
disable V
3
3.2mA
CC2
0
< 7.7V
aux
V
PWM
PFC
C
CC1
3
V
CC2
20V
9V
9V
I
ch
16
13
10
12
14
1
7
6
V
V
V
HV
Out2
Ramp
Out1
GND1
CC2
aux
control