Title :
Frequency-controlled series-resonant DC-DC converter with center-tapped synchronous rectifier
Author :
Kazimierczuk, Marian K. ; Wu, Chuyun ; Cravens, Robert C., II
Author_Institution :
Dept. of Electr. Eng., Wright State Univ., Dayton, OH, USA
Abstract :
A frequency-controlled series resonant DC-DC converter is presented. It consists a Class-D zero-voltage switching series resonant inverter and a center-tapped synchronous rectifier. If the DC output voltage is low, the efficiency of the converter is dominated by the efficiency of the rectifier. Low on-resistance MOSFETs are used in the rectifier instead of diodes. Therefore, the forward voltage drop is low, resulting in a high-efficiency. The DC output voltage is regulated against variations in the load resistance and the DC input voltage by varying the operating frequency. Experimental results are presented for a converter with a DC input voltage of 150 V, an output voltage of 5 V, and a DC load resistance ranging from 0.5 to 5 Ω. The measured efficiency was 80% for a 50 W output and 89% for a 25 W output. The theoretical results were in good agreement with the measured results
Keywords :
DC-DC power convertors; frequency control; invertors; nonlinear network analysis; rectifiers; 0.5 to 5 ohm; 150 V; 25 to 50 W; 5 V; 80 to 89 percent; MOSFETs; ZVS series resonant inverter; center-tapped synchronous rectifier; class-D type; frequency-controlled DC-DC converter; series-resonant DC-DC converter; zero-voltage switching; DC-DC power converters; Electrical resistance measurement; Frequency conversion; Low voltage; MOSFETs; Rectifiers; Resonance; Resonant frequency; Resonant inverters; Zero voltage switching;
Conference_Titel :
Circuits and Systems, 1994., Proceedings of the 37th Midwest Symposium on
Conference_Location :
Lafayette, LA
Print_ISBN :
0-7803-2428-5
DOI :
10.1109/MWSCAS.1994.519034
