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Power Train Discrete - Device Power Loss and Analysis
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Design

Loss Tool Design Steps

    1. Design Requirements

1a. AC Input
1b. DC Output
1c. Operating Conditions
1d. Maximum Junction Temperature and Voltage De-rating

    2. Semiconductor Selections

2a. Switch Type
2b. Switch + Boost Diode Combination
2c. Bridge Diode
2d. Final Selection for BOM and Report

Step 1: Design Requirements

 

    1a. AC Input

Min AC Line Voltage (RMS) V
85.0
Max AC Line Voltage (RMS) V
265.0
Min Line Frequency Hz
50.0

    1b. DC Output

DC Output Voltage V
400.0
Output Ripple Voltage Tolerance %
10.0
Default
PFC Output Power W
400.0
Default
PFC Output Current A

    1c. Operating Conditions

PFC Operating Mode BCM is preferred if the output power is less than 250W. Otherwise use CCM.
PFC Switching Frequency The minimum switching frequency should be more than 20kHz if BCM is selected to avoid audible noise. kHz
100.0
Recommended
Expected PFC Efficiency %
92.0
Recommended
Boost Inductor Inductance uH
2345.683
Recommended
Boost Inductor Resistance
100

    1d. Maximum Junction Temperature and Voltage De-rating

Maximum Juncture Temperature of Switch and Boost Diode °C
150.0
Maximum Juncture Temperature De-rating factor %
20.0
Recommended
De-rated Tjmax °C
Voltage De-rating Factor for Switch and Boost Diode %
10.0
Recommended
Minimum Voltage Rating for Switch and Boost Diode V
Estimated Heatsink Temperature °C
60.0
Switch Case-to-Heatsink Thermal Resistance °C/W
0.1
Boost Diode Case-to-Heatsink Thermal Resistance °C/W
0.1
 
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