SLUAAN0 December   2022 TPS62933F

 

  1.   Designing a Simple and Low-Cost Flybuck Solution With the TPS62933F
  2.   Trademarks
  3. 1Introduction
  4. 2Flybuck Converter Device Overview
    1. 2.1 Operation Description
    2. 2.2 Equations for Maximum Output Current
  5. 3Design Flybuck With TPS62933F
    1. 3.1 Primary Voltage and Turns Ratio
    2. 3.2 Feedback Resistor
    3. 3.3 Rectifier Diode
    4. 3.4 Primary Inductance
    5. 3.5 Primary Turns
    6. 3.6 Input and Output Capacitor
    7. 3.7 Pre-Load
    8. 3.8 Factors Affecting Voltage Regulation
    9. 3.9 Avoiding Low-Side Sink Current Limit
  6. 4Experimental Results
  7. 5Conclusion
  8. 6References

1 Designing a Simple and Low-Cost Flybuck Solution With the TPS62933F

In many applications, simple, low part-count, isolated power supplies working from an input voltage are needed. A popular solution to these requirements is an isolated buck power supply. This application report presents a simple and low-cost flybuck solution using the TPS62933F device. The basic operating principles of a flybuck converter are discussed, operating current and voltage waveforms are shown, and key design equations are derived. Lastly, a step-by-step design example is presented.