Optimal design of planar integrated magnetics for high-frequency double-frequency Buck converter
In order to solve the problem that the efficiency and power density of double frequency Buck converters are still relatively low,which are caused by insufficient switching devices and magnetic components,a double-frequency Buck converter with high efficiency and high power density is proposed.Converter will work in CCM mode,using decoupled planar integrated inductors to complete the integration of the magnetic components of the system.Combined with the integration method of magnetic components,the limited number of PCB layers and the char-acteristics of the converter,the parameters of the double frequency Buck converter are given.Then,a design method of planar magnetic components is proposed,and the optimal design of the magnetic components of the system is completed.Finally,based on the third-generation semiconductor SiC devices and planar integrated magnetic components,a double-frequency Buck converter with a rated power of 200 W and the switch frequency of 400 kHz is designed.The results show that the peak efficiency of the converster will reach 96.1％,and the power density will be 46.1 W/in3(1 in=25.4 mm).These confirm the correctness and effectiveness of the double-frequency Buck converter design method.
double frequency Buck converterplanar magneticshigh frequency,high efficiency and high power densitySiC devices
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