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Phase Shift Full Bridge

Used for:

High power and high efficiency

Pros:

• High Efficiency - zero voltage switching possible
• 50% duty cycle gate drive to all switches
• Switch voltage limited to Vcc

TI UCC28950 1

TI PSFB Design

TI UCC28950 2

TI LM5046

TI UCC28950 3

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Cons:

• Requires 4 switches
• Two high side drives
• Requires extras series primary inductor or controlled leakage inductance