A series-capacitor tapped buck (SC-TaB) converter for regulated high voltage conversion ratio DC-DC applications

Author

Minjie Chen ; Shenoy, Pradeep S. ; Morroni, Jeffrey

Author_Institution

Power Electron. Res. Group, MIT, Cambridge, MA, USA

fYear

2014

fDate

14-18 Sept. 2014

Firstpage

3650

Lastpage

3657

Abstract

This paper explores a Series-Capacitor Tapped Buck (SC-TaB) converter for regulated high voltage conversion ratio dc-dc applications targeting high efficiency and high power density. By adding one series capacitor and one auxiliary switch to the conventional tapped inductor buck converter, the proposed converter features many advantages including: (1) full soft switching; (2) reduced parasitic ringing; (3) capacitive energy buffering; (4) extended duty ratio; (5) reduced switch stress and (6) high efficiency over wide operating ranges. Experimental results of a 48V/5V, 750kHz, 100W, two-phase-interleaved dc-dc converter shows 91% peak efficiency, and above 88% efficiency over 38-58V input voltage range and 25-75W power range.

Keywords

DC-DC power convertors; power capacitors; SC-TaB converter; auxiliary switch; capacitive energy buffering; conventional tapped inductor buck converter; extended duty ratio; frequency 750 kHz; full soft switching; high efficiency; high power density; power 100 W; power 25 W to 75 W; reduced parasitic ringing; reduced switch stress; regulated high voltage conversion ratio DC-DC applications; series-capacitor tapped buck converter; two-phase-interleaved DC-DC converter; voltage 38 V to 58 V; voltage 48 V; voltage 5 V; wide operating ranges; Capacitors; Inductance; Inductors; Stress; Switches; Switching frequency; Video recording;

fLanguage

English

Publisher

ieee

Conference_Titel

Energy Conversion Congress and Exposition (ECCE), 2014 IEEE

Conference_Location

Pittsburgh, PA

Type

conf

DOI

10.1109/ECCE.2014.6953897

Filename

6953897