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L6566B Datasheet(PDF) 45 Page - STMicroelectronics

Part # L6566B
Description  Multi-mode controller for SMPS
PDF  51 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L6566B Datasheet(HTML) 45 Page - STMicroelectronics

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L6566B
Application examples and ideas
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Figure 30. Typical full-feature application schematic (FF operation)
IC1
L6566B
Vout
B1
C1
R4
C3
Q1
R2
D2
1N4148
R18
D1
C7 2.2 nF Y1
C8A,B
T1
ZCD
GD
CS
Vcc
DIS
GND
VFF
COMP
D4
IC3 PC817A
R3
D3 1N4148
3
4
C6
R5
C2
Vin
88 to
264 Vac
F1
fuse
CX1
CX2
CY1
CY2
NTC1
Lx
SS
C5
VREF
MODE/SC
C4
R6
HVS
OSC
AC_OK
R1
FMOD
C10
R11
R12
R13
R14
R15
R16
R17
R8
C9
R9
R10
1
2
TL431
R7
NTC2
4
7
3
5
11
6
8
9
14
13
16
10
12
1
15
Table 8. External circuits that determine IC behavior upon OVP and OCP
OVP Latched
OVP Auto-restart
OCP Latched
OCP Auto-restart
L6566B
AC_OK
16
RH
VFF
15
RL1
RL2
RFF
RFF
≈ 10 RL2
SS
VREF
14
10
L6566B
AC_OK
16
RH
VFF
15
RL1
RL2
Diode needed if
4
6
R
R
1
R
10
3
1
3
3
2
L
1
L
1
L
3
.
.
.
≥
+
⋅
+
−
SS
VREF
14
10
L6566B
AC_OK
16
RH
VFF
15
RL1
RL2
RFF
SS
VREF
14
10
1N4148
L6566B
AC_OK
16
RH
VFF
15
RL1
RL2
SS
VREF
14
10
1N4148
Diode needed if
4
6
R
R
1
R
10
3
1
3
3
2
L
1
L
1
L
3
.
.
.
≥
+
⋅
+
−



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