L6566A View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'L6566A' PDF : 52 Pages View PDF
L6566A
Application examples and ideas
Figure 30. Typical full-feature application schematic (FF operation)
PFC Pre-regulator Output bus
C1
Output capacitor of boost
PFC Pre-regulator
R1
C2
D1
T1
D4
R2
R15
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
10
L6566A
13
14
9
3
CS
7
MODE/SC
12
R17
R5
R16
R13
VREF
OSC
SS
NTC2
COMP GND
R18
R12
C4
R6
C5
C6
C8A,B
C7 2.2 nF Y1
IC3 PC817A 1
4
3
2
TL431
Vout
R7
R9
C9 R8
R10
Table 7.
External circuits that determine IC behavior upon OVP and OCP
OVP latched
OVP auto-restart
OCP latched
SS
VREF
14
10
RH
RFF
L6566A
VFF 15
RL
RFF needed if RL < 4.7 kΩ
SS
VREF
AC_OK 14
10
RH
16
L6566A
VFF 15
RL
Diode needed if RL > 4.7 kΩ
OCP auto-restart
1N4148
SS
VREF
14
10
RH
RFF
L6566A
VFF 15
RL
RFF needed if RL < 4.7 kΩ
1N4148
SS
VREF
AC_OK 14
10
RH
16
L6566A
VFF 15
RL
Diode needed if RL > 4.7 kΩ
Doc ID 13794 Rev 4
45/52
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