Buck Converter - Efficiency Factors

Efficiency Factors

Conduction losses that depend on load:

  • Resistance when the transistor or MOSFET switch is conducting.
  • Diode forward voltage drop (usually 0.7 V or 0.4 V for schottky diode)
  • Inductor winding resistance
  • Capacitor equivalent series resistance

Switching losses:

  • Voltage-Ampere overlap loss
  • Frequencyswitch*CV2 loss
  • Reverse latence loss
  • Losses due driving MOSFET gate and controller consumption.
  • Transistor leakage current losses, and controller standby consumption.

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