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Synchronous Rectifier in Flyback Converter

Synchronous Rectifier in Flyback Converter. Rectifier Circuit Rectifier Concept Synchronous Rectifier C - 1 : Constant Frequency ( CF ) Continuous Conduction Mode ( CCM ) C - 2 : Constant Frequency ( CF ) Discontinuous Conduction Mode ( DCM )

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Synchronous Rectifier in Flyback Converter

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  1. Synchronous RectifierinFlyback Converter

  2. Rectifier Circuit • Rectifier Concept • Synchronous Rectifier • C - 1 : Constant Frequency ( CF ) • Continuous Conduction Mode ( CCM ) • C - 2 : Constant Frequency ( CF ) • Discontinuous Conduction Mode ( DCM ) • C - 3 : Variable Frequency ( VF ) • Discontinuous Conduction Mode ( DCM ) • C - 4 : Variable Frequency ( VF ) • Zero-Voltage-Switched ( ZVS ) • Discontinuous Conduction Mode ( DCM ) • D. Power Loss Comparisons • E. Efficiency Curve

  3. A. Rectifier Circuit Fig2 : Flyback Converter with Diode Fig1 : Flyback Converter with MOSFET

  4. B. Rectifier Concept The switching losses caused by the reverse recovery current of the body - diode will be dependent of the carried current in the instant in the which the voltage between anode and cathode reverses become negative

  5. C. Synchronous Rectifier C - 1 : Constant Frequency ( CF ) Continuous Conduction Mode ( CCM )

  6. C. Synchronous Rectifier C - 2 : Constant Frequency ( CF ) Discontinuous Conduction Mode ( DCM )

  7. C. Synchronous Rectifier C - 3 : Variable Frequency ( VF ) Discontinuous Conduction Mode ( DCM )

  8. C. Synchronous Rectifier C - 4 : Variable Frequency ( VF ) Zero-Voltage-Switched ( ZVS ) Discontinuous Conduction Mode ( DCM )

  9. D. Power Loss Comparisons

  10. E. Efficiency Curve

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