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AN2747 датащи(PDF) 35 Page - STMicroelectronics

номер детали AN2747
подробное описание детали  250 W HID metal halide electronic ballast
PDF  44 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
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AN2747 датащи(HTML) 35 Page - STMicroelectronics

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AN2747
Full bridge design criteria
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The power losses can be divided in two quantities: IGBT losses and diode losses. The IGBT
power losses are mainly due to the conduction phase and depend on Vcesat.
Equation 15
In the diode the conduction losses (considering a duty cycle of 50%) can be estimated using
the following formula:
Equation 16
Where:
●
PDcond= diode conduction losses
●
IF(av)= average forward current
●
IF(rms)= RMS forward current
P
IGBTcond
V
ce
I
Fav
()
⋅
=
P
Dcond
V
to
I
Fav
()
rd I
2
Frms
()
⋅
+
⋅
=



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