ncp1601a ON Semiconductor, ncp1601a Datasheet - Page 2

• Manufacturer Part Number: ncp1601a
• Description: Compact Fixed Frequency Discontinuous Or Critical Conduction Voltage Mode Power Factor Correction Controller
• Manufacturer: ON Semiconductor

C
Osc / Sync
OSC
R
FB / SD
S
V
V
CC
CC
AC
Input
CS
8
1
4
5
18 V
9 V
9 V
9 V
V
Internal Bias
Reference
CC
Filter
EMI
V
Block
0
CC(on)
+
Current
Mirror
&
I
−
S
Current
1
Mirror
UVLO
/ 9 V
45 mA
94 mA
Input
AC
Shutdown / UVP
(I
5 / 3.5 V
FB
Filter
Oscillator / Synchronization Block
EMI
I
FB
< 8% I
+
−
Figure 1. Typical Application Circuit
(I
Figure 2. Functional Block Diagram
Zero Current
Overcurrent
(I
V
Regulation Block
S
Protection
(I
Detection
S
96%
reg
FB
> 203 mA)
ref
Overvoltage
< 14 mA)
C
NCP1601A, NCP1601B
Protection
)
filter
> 107% I
I
ref
http://onsemi.com
I
ref
ref
S
R
I
)
FB
R
CS
L
2
FB
V
Ramp GND
CS
NCP1601X
Q
control
OR
300 k
delay
V
Osc
Drv
&
PFC
Modulation
CC
&
(95 / 140 °C)
Shutdown
15 V
Thermal
R
+
−
1
−
+
0
Vcontrol Processing
R
S
C
1
V
1
ton
R
Q
2
Output
C
bulk
1
Output
Driver
0
3.9 Vmax
R
C
clamp
9 V
on
3
off
9 V
3
I
Output Voltage (V
ch
V
CC
2
3
7
6
R
Ramp
V
FB
GND
Drv
control
C
C
out
control
ramp
)