AN3276

Conclusion

Doc ID 17975 Rev 1

19/22

4

Conclusion

improve the CCM PFC performance as shown in Table 4.

This circuit supports the actual energy efficiency recommendation at 20%, 50% and 100%

of rated power supplies.

Table 4.

Criteria at 90 V rms

SiC diode

Benefits

Efficiency

92.5%

93.7%

+1.2%

Power MOSFET

temperature

90 °C

72 °C

-18 °C

Power density at

iso-efficiency

State of art

Improve, save 5.4 W

+1.2% gain

EMI

Acceptable with

dI/dt < 1000 A/µs

Acceptable with

dI/dt < 100 A/µs

Soft switching

Boost rectification cost

Mass market