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Part Name
Description
L6566B View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
L6566B
Multi-mode controller for SMPS
STMicroelectronics
'L6566B' PDF : 51 Pages
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L6566B
Application examples and ideas
Figure 30. Typical full-feature application schematic (FF operation)
F1
f use
NTC1
Vin
88 to CX1
264 Vac
Lx
CY 1
CX2
B1
C1
CY2
R1
C2
D1
T1
D4
R2
R16
D2
R15
C3
1N4148
MODE/SC
HVS
Vcc
AC_OK
ZCD
R3
12
1
5 11
16
R14
VFF
15
DIS
8
IC1
L6566B
GD
4
CS
7
10
6
13
14 9
3
R4
Q1
D3 1N4148
R17
R5
R18
R13
NTC2
VREF FMOD
OSC
SS COMP GND
R11
C10
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
R
H
AC_OK
14
10
16
R
L1
R
FF
L6566B
VFF
15
R
L2
R
FF
≈
10 R
L2
OCP auto-restart
1N4148
SS
VREF
R
H
AC_OK
14
10
16
R
L1
R
FF
L6566B
VFF
15
R
L2
SS
R
H
AC_OK
14
VREF
10
16
R
L1
L6566B
VFF
15
R
L2
Diode needed if
3
.
3
+
1
.
3
⋅
10
−
3
R
L1
1
+
R
L1
≥
6
.
4
R
L2
1N4148
SS
R
H
AC_OK
14
VREF
10
16
R
L1
L6566B
VFF
15
R
L2
Diode needed if
3
.
3
+
1
.
3
⋅
10
−
3
R
L1
≥
6
.
4
1
+
R
L1
R
L2
45/51
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