AN966 Datasheet, PDF (17/21 Pages) STMicroelectronics – The front-end stage of conventional off-line converters

AN966 APPLICATION NOTE
Figure 13. 80W, Wide Range Demonstration Board(EVAL6561-80): Electrical Circuit
FUSE
4A/250V
Vac
(85V to 265V)
BRIDGE
C1
+
W04M
1 µF
400V
-
T
R4 R5
180 kΩ 180 kΩ
D8
1N4150
C5 12 nF
R14
R1
750 kΩ
D2
1N5248B
100 Ω
R6
68 kΩ
R50 12 kΩ
C3 470 nF
R2
750 kΩ
C23
1 µF
85
2
1
R7
33 Ω
3 _L6561 7
6
4
D1
STTH1L06
NTC
2.5 Ω
R11
750 kΩ
R12
750 kΩ
MOS
STP8NM50
R3
10 kΩ
C2
10nF
C29
22 µF
25V
C4
100 nF
Boost Inductor Spec (ITACOIL E2543/E)
E25x13x7 core, 3C85 ferrite
1.5 mm gap for 0.7 mH primary inductance
Primary: 105 turns 20x0.1 mm
Secondary: 11 turns 0.1mm
D3 1N4148
C7
10 µF
35 V
R16
91 kΩ
R15
220 Ω
R9
0.41Ω
1W
THD REDUCER (optional)
R10
0.41Ω
1W
R13
9.53 kΩ
Vo=400V
Po=80W
C6
47 µF
450V
-
Table 2. EVAL6561-80 Evaluation Results
V_in (Vac)
85
110
135
175
220
265
Pin (W)
87.2
85.2
84.2
83.5
83.1
82.9
V_o (Vdc) ∆V_o (Vdc)
400.1
14
400.1
14
400.1
14
400.1
14
400.1
14
400.1
14
P_o (W)
80.7
80.7
80.7
80.7
80.7
80.7
η (%)
92.8
94.7
95.8
96.6
97.1
97.3
w/o THD reducer
PF
THD (%)
0.999
3.7
0.996
5.0
0.989
6.2
0.976
8.3
0.940
10.7
0.890
13.7
with THD reducer
PF
THD (%)
0.999
2.9
0.996
3.2
0.989
3.7
0.976
4.3
0.941
5.6
0.893
8.1
Figure 14. EVAL6561-80: PCB and Component Layout (Top view, real size 57x108mm)
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