Title :
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
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;
Conference_Titel :
Energy Conversion Congress and Exposition (ECCE), 2014 IEEE
Conference_Location :
Pittsburgh, PA
DOI :
10.1109/ECCE.2014.6953897
