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Two Switch Forward Converter
Used for:
Isolated supplies where switch voltage must be limited and where 50% duty cycle max is acceptable
Pros:
- Switch voltage stress is clamped to Vcc
- Leakage inductance energy is returned to the supply
- No snubber needed
- Transformer primary connections swing symmetrically - can can cancel EMI if mechanical layout considered
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Cons:
- Two switches needed
- High-side gate drive needed
- Duty cycle limited to 50%