Analysis and Design of a Class E Type High Frequency DC–DC Converter Based on Resonant Driving Circuit

Yueshi Guan,Yijie Wang,Tingting Yao,Dianguo Xu,Wei Wang

doi:10.1109/ojies.2020.3007437

Yueshi Guan, Yijie Wang + Show 3 more

Open Access

https://doi.org/10.1109/ojies.2020.3007437

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Abstract

In this paper, a class E type high frequency DC-DC converter is proposed. The detailed analysis and parameter optimal design method are depicted in this paper. Based on optimal parameters, the switch can operate in ZVS condition. Also, to reduce the driving losses, a multistage resonant driving circuit is adopted and analyzed in this paper, which can utilize the energy stored in the switch input capacitance. The on/off control method is adopted to regulate output voltage and the enable signal frequency is 340 kHz. From the output side, the circuit can be seen as operating at enable signal frequency with high sampling frequency. A 20 MHz prototype is built in this paper, which verifies the feasibility of high frequency converter and control method.

Highlights

In switching mode power system (SMPS), with the demand of high power density, the system operating frequency keeps increasing
To solve the aforementioned problems, a high frequency DC–DC converter with resonant driving circuit is proposed in this paper
It can be seen that the driving circuit losses form a proportional relationship with the gate resistance and GUAN ET AL.: ANALYSIS AND DESIGN AF A CLASS E TYPE HIGH FREQUENCY DC–DC CONVERTER BASED ON RESONANT DRIVING CIRCUIT TABLE 2

Summary

INTRODUCTION

In switching mode power system (SMPS), with the demand of high power density, the system operating frequency keeps increasing. High operating frequency can greatly reduce the volume of inductors and capacitors, the dynamic characteristics can be improved [1]–[3]. In terms of control method, due to the low operating frequency of conventional converter, the output voltage can be regulated by pulse width modulation (PWM) [10], [11]. To solve the aforementioned problems, a high frequency DC–DC converter with resonant driving circuit is proposed in this paper. A resonant driving circuit with shunt branch is adopted in this paper, which can further reduce the driving loss of high frequency converters.

WORKING PRINCIPLE OF THE PROPOSED CONVERTER

INVERTER STAGE

SYSTEM DESIGN AND EXPERIMENTAL RESULTS

CONCLUSION