SI6542DQ_ View Datasheet(PDF) - Vishay Semiconductors
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Description
MFG CO.
SI6542DQ_ Datasheet PDF : 7 Pages
| |||
AN805
Vishay Siliconix
APPENDIX A CROSSOVER LOSSES
Power loss due to crossover or switching transition loss can be calculated from the generic expression below
ƪ ŕ ts1
PS + f tts1 VDS
0
ŕ ts2
ID dt ) ts2 VDS
0
ƫ ID dt
From this equation we can define the crossover losses generically for both resistive and clamped inductive loads.
Vdd
RL
Vds
Resistive Cross over Losses
Vdd / RL
Ids
ts1
ts2
Power
Dissipation
Vds . Ids (ts1 + ts2) f
P=
6
Vdd
RL
Vds
Clamped Inductive Cross over Losses
Id1
ts2
Document Number: 70649
January 1997
+
Ids
–
ts1
Power
Dissipation
Vds (Id1 . ts1 + Id2 . ts2) f
P=
2
ts2
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