AN966 Datasheet, PDF (20/21 Pages) STMicroelectronics – The front-end stage of conventional off-line converters

AN966 APPLICATION NOTE
Figure 19. Vmains=277 Vac, Vo=320V, Po=140W buck-boost topology
FUSE
Vac
277V +10%
-15%
BRIDGE
+ ^{4 x BY255}
-
C1
0.22µF
630V
R9
1.8M
5%
R10
6.2K
5%
T
V_CC
C6
10nF
R1
68K 5%
C3 330nF
8
3
C2
22µF
25V
5
2
1
L6561 7
6
4
C4
1nF
C5
82µF/100µF
385V
MOS
STP5N80
R5 10
D1 BYT13-800
V_CC
A
8
LM358
R11 62K 1%
+
3
-
2
4
R3 12K 1%
R4 330
R6 0.47
1W
R12
330K
-
Vo=320V
Po=140W
+
R2
1.3M
1%
R7
1.3M
1%
R8
12K
1%
TRANSFORMER
T: core THOMSON-CSF B1ET2910A
primary 150T of Litz wire 10 x 0.2mm
secondary 7T of #32 AWG (0.15mm)
primary inductance: 3mH
D97IN681
REFERENCE:
[1] "Control loop modelling of L6561-based TM PFC" (AN1089).
20/21