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PFC (Power Factor Correction) inductors are used in active boost circuits to correct harmonic current distortion in AC to DC converters. The goal is to achieve a Power Factor (PF) as close to 1.0 are possible.
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Inductor Selection
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Switching Frequency
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Output Power Requirements
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Temperature Rise/Environment
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Maximum Peak Desired Current
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Physical Size
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Mechanical Mounting Methods
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Additional Bias Voltage Needs
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Inductor Optimization
Proper Core Selection
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Ferrite
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Powered Iron
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Low Loss
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High Flux
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MPP
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Gapped Amorphous Core
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Wire & Winding Configurations
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Balance AC & DC Losses
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Litz Wire
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Proximity Effect
Trade-Offs / Challenges
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E-Core - Inductor, PFC
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Inductance controlled by Core Gapping
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High Current
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Lower Winding Cost
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PFC Board Mounting
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Toroid - Choke,
PFC, IR 1150
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Inductance Swing
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Moderate Cost
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Higher Loss
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