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AN604 Fiches technique(PDF) 7 Page - STMicroelectronics

No de pièce AN604
Description  Calculation of conduction losses in a power rectifier
PDF  12 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN604 Fiches technique(HTML) 7 Page - STMicroelectronics

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AN604
Conduction losses: basic equations
Doc ID 3607 Rev 3
7/12
Figure 4.
Average and rms currents of commonly observed waveforms
Square waveform
t
ID(t)
0
T
sw
δ•Tsw
IMax
Trapezoidal waveform
T
sw
δ•T
sw
t
ID(t)
0
IMax
IMin
δ
δ
·
=
·
=
Max
RMS
F
Max
AV
F
I
I
I
I
)
(
)
(
δ
δ
·
×
+
+
=
·
+
=
3
I
I
I
I
I
2
I
I
I
Min
Max
2
Min
2
Max
RMS
F
Min
Max
AV
F
)
(
)
(
t
ID(t)
0
IMax
Tsw
δ•T
sw
2
I
I
I
2
I
Max
RMS
F
Max
AV
F
δ
δ
π
·
=
·
=
)
(
)
(
Half period sinusoidal waveform
t
ID(t)
0
IMax
T
sw
δ·T
sw
Triangular waveform
3
I
I
2
I
I
Max
RMS
F
Max
AV
F
δ
δ
·
=
·
=
)
(
)
(



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