5MHz PWM-controlled current-mode resonant DC-DC converter with GaN-FETs

Author

Hariya, Akinori ; Ishizuka, Yoichi ; Matsuura, Kanta ; Yanagi, Hiroshige ; Tomioka, Satoshi ; Ninomiya, Tamotsu

Author_Institution

Grad. Sch. of Eng., Nagasaki Univ., Nagasaki, Japan

fYear

2014

fDate

16-20 March 2014

Firstpage

1426

Lastpage

1432

Abstract

In this paper, a proposed pulse width modulation (PWM) control method for the isolated current-mode resonant DC-DC converter with MHz level switching frequency is presented. The circuit topology is same as a conventional resonant converter with synchronous rectification and without any additional components. The control technique for the output voltage regulation is proposed with the unique PWM control for synchronously-rectifying switches. By using the transformer´s leakage inductance and the PWM control, the boost conversion can be realized. In addition, to achieve the zero-voltage switching (ZVS) operation, phase-shift between primary and secondary-side switches is adapted. The ZVS operation can maintain for primary-side switches. In this paper, proposed technique for achieving stable ZVS operation has been discussed. Some experiments have been done with 5MHz isolated DC-DC converter which has Gallium Nitride field effect transistor (GaN-FET), and the total volume of the circuit is 16.14cm³. The data show that the maximum power efficiency is 89.4%.

Keywords

DC-DC power convertors; III-V semiconductors; PWM power convertors; field effect transistors; gallium compounds; resonant power convertors; voltage control; wide band gap semiconductors; zero voltage switching; FETs; GaN; MHz level switching frequency; PWM-controlled current-mode resonant DC-DC converter; ZVS operation; boost conversion; circuit topology; frequency 5 MHz; gallium nitride field effect transistor; output voltage regulation; phase-shift; primary-side switches; pulse width modulation control method; secondary-side switches; synchronous rectification; synchronously-rectifying switches; transformer leakage inductance; zero-voltage switching; Control systems; Inductance; Magnetic resonance; Pulse width modulation; Switching frequency; Voltage control; Zero voltage switching;

fLanguage

English

Publisher

ieee

Conference_Titel

Applied Power Electronics Conference and Exposition (APEC), 2014 Twenty-Ninth Annual IEEE

Conference_Location

Fort Worth, TX

Type

conf

DOI

10.1109/APEC.2014.6803494

Filename

6803494