Hardware

MOSFETs (IRFB4020PBF):

  • Continuous Drain Current (ID): 18 A at 25°C
  • Drain-to-Source Voltage (VDSS): 200 V
  • Maximum Power Dissipation (PD): 100 W at 25°C

Inductors (AIRD-02-221K):

  • Inductance: 220 µH ​
  • Current Rating:
    • Continuous: 2.8 A
    • Saturation: 7 A

Capacitors (1189-4160-1-ND):

  • Rated Voltage 250V
  • Ripple Current @ Low Frequency: 188 mA @ 120 Hz
  • Ripple Current @ High Frequency: 470 mA @ 100 kHz

Theoretical max:

  • Pmax = Vmax * Imax = 200V * 2.8A = 560W

BUUUTTTT — that’s theoretical! Needn to consider:

  • Need to consider proper heatsinking for the MOSFETs (18 A is at 25°C, derates with temp)
  • Ripple current through cap < 470mA
  • Safe design margin: do not run at 100% ratings
  • Consider switching trajectory

Reasonably speaking somwhere up to 450W