ISO 9001 / ISO 14001
01/06/2016
© Productivity Engineering GmbH
Page 7 of 22
EVA4204/4301
User Guide
Evaluation Board for 80W PFC Supply
∆
I
f
D
V
=
L
∗
∗
∗
in
CCM
2
(21)
µH
21425
A
11
,
0
40kHz
0,615
110V
2
CCM_LL
=
=
L
∗
∗
∗
(22)
µH
7536
0,093A
40kHz
0,074
265V
2
CCM_HL
=
=
L
∗
∗
∗
(23)
For high line voltage and high output power the inductor set to 8000µH.
The switching frequency at low line voltage obtains as:
∆
I
L
D
V
=
f
∗
∗
∗
CCM
in
2
(24)
kHz
6
,
109
A
11
,
0
8000µH
0,62
110V
2
=
=
f
∗
∗
∗
(25)
4.4 Current Sense Resistor
PE4201
The current sense resistor provides the threshold voltage for the over-current protection function. The
maximum inductor peak current is set to 1,48 A.
0,15
Ω
=
1,48A
0,22V
=
OCP
I
SHPCP
V
=
s
R
(26)
R
sense
=0,15
Ω
PE4301
1,55
Ω
=
0,61A
0,95V
=
OCP
I
CSPCP
V
=
s
R
(27)
R
sense
=1,55
Ω
For higher/lower output power the resistor RS has to be reduced/increased and the inductor has to be
re-calculated.
