ap1661 BCD Semiconductor Manufacturing Limited, ap1661 Datasheet - Page 10

• Manufacturer Part Number: ap1661
• Description: Power Factor Correction Controller
• Manufacturer: BCD Semiconductor Manufacturing Limited

2.5A/250V
F1
Functional Block Description
(Continued)
Zero Current Detection
AP1661 is a DCM boundary conduction current mode
PFC controller. Usually, the zero current detection
(ZCD) voltage signal comes from the auxiliary
winding of the boost inductor. When the ZCD pin
voltage decreases below 1.6V, the gate drive signal
Typical Application
Sep. 2007 Rev. 1. 0
POWER FACTOR CORRECTION CONTROLLER
L
N
500µH
GND
L1
Figure 12. 85 to 265V Wide Range Input 90W PFC Demo Board Electrical Schematic Circuit
85 to 265V AC
220nF/275V
NTC
JC1
C1
L3:
Core type RM10, material 3C90
primary: 660uH, 66 turns of litze wire 0.1mm*30
secondary: 7 turns wire of 0.2mm
220nF
D1
500V
C2
L2 160µH
330nF
500V
C3
680K
R4
1M
10K
R3
R5
1N4148
R6 180K
R7 180K
10
D3
22µF
C10
25V
becomes high to turn on the external MOSFET. 500mV
of hysteresis is provided to avoid false triggering. The
ZCD pin can be used for disabling the IC. Making its
voltage below 0.15V or short to the ground will disable
the device thus reduce the IC supply current
consumption.
12nF
15V
C6
Z1
100nF
100
R8
68K
R9
C4
VCC
MULT
BCD Semiconductor Manufacturing Limited
ZCD
L3
COMP
R14
12K
GND
AP1661
U1
680nF
C7
INV
GD
CS
330nF
C8
Preliminary Datasheet
R13
10
D2 MUR460
11N65C3
0.33/1W
R16
Q1
820K
470K
AP1661
R1
R2
8.2K
R10
JC2
47µF
450V
C9