Table 1 Key parameters of the converter.

From: Research on three-stage hybrid optimization control of the three-level half-bridge LLC resonant converter

System parameters

Parameter values

Input voltage\({U_{\text{i}}}\)

600 V

Output voltage\({U_{\text{o}}}\)

150 ~ 650 V

Frequency of resonance\({f_{\text{r}}}\)

120 kHz

Resonant inductance\({L_{\text{r}}}\)

8e-6 H

Resonant capacitance\({C_{\text{r}}}\)

220e-9 F

Parasitic capacitance\({C_{{\text{oss}}}}\)

1e-10 F

Ratio of inductance k

0.182

Factor of quality Q

0.32

Ratio of change n

0.64

PFM-PSM switching point\({U_{{\text{s1}}}}\)

470 V

Resistance of load\({R_{\text{L}}}\)

56.03Ω