L6566A View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'L6566A' PDF : 52 Pages View PDF
Application examples and ideas
6
Application examples and ideas
L6566A
Figure 28. Typical low-cost application schematic
PFC Pre-regulator Output bus
Output capacitor of boost
PFC Pre-regulator
R1
D1
DIS
8
VFF 15
12
MODE/SC
R3 470k
FMOD
6
10
VREF
C3
AC_OK
HVS
Vcc
16
1
5
IC1
L6566A
GD
4
CS
7
ZCD
13
14 9
3
11
OSC
SS COMP GND
R2
D2
R4
D3
Optional f or
C4 R6
C5
C6
QR operation
Optional f or
QR operation
T1
C2
D4
Vout
C8A,B
C7 2.2 nF Y1
R7
Q1
IC3
1
4
R5
R9
3
2
C9 R8
TL431
R10
Figure 29. Typical full-feature application schematic (QR operation)
PFC Pre-regulator Output bus
C1
Output capacitor of boost
PFC Pre-regulator
T1
R1
C2
D1
R2
R14
to Vcc pin of
PFC controller
Vcc_PFC
to mains
v oltage sensing
AC_OK
HVS
Vcc
D2
C3
1N4148
ZCD
R3
6
16 1
5 11
VFF
15
GD
R4
4
Q1
IC1
D3 1N4148
DIS 8
L6566A
CS
7
10
12
13
14 9
3
R5
R18
R13
NTC2
VREF
MODE/SC OSC
SS COMP GND
R12
C4
R6
C5
C6
D4
C8A,B
C7 2.2 nF Y1
IC3 PC817A 1
4
3
2
TL431
Vout
R7
R9
C9 R8
R10
44/52
Doc ID 13794 Rev 4
Share Link: 
