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MOSFET Power Losses Calculation Using the Data- Sheet ...

Never stop Power MOSFET Power Losses Calculation Using the Data- Sheet Parameters by Dr. Du an Graovac, Marco P rschel, Andreas Kiep Application Note, V , July 2006 MOSFET Converter Losses Application Note 2 2006-07-31 Table of Content 1 Abstract ..3 2 MOSFET and Diode Losses ..3 conduction RDSon - Taking the Temperature and Production Variations into Switching Losses ..6 Switch-on Switch-off Switching Energies and Losses ..10 Loss 3 Application Specific Parameters ..11 Step-down (Buck) Step-up (Boost) Converter ..12 DC Motor Three-Phase AC Motor Switched Reluctance Motor Drive ..18 Piezo-Electric Actuator ..19 4 5 MOSFET Converter Losses 31 Abstract The aim of this Application Note is to provide a mathematical tool for the Calculation of Power Losses in MOSFET -based Power electronics converters used in automotive applications.

MOSFET conduction losses: 2 0 2 0 ( ()) 1 ( ) 1 DSon Drms Tsw DSon D sw Tsw CM sw CM R i t dt R I T p t dt T P = ∫ = ∫ ⋅ = ⋅ where I Drms is the rms value of the MOSFET on-state current. The conduction losses of the anti-parallel diode can be estimated using a diode approximation with a series connection of DC voltage source (u

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