Title :
Abnormal phenomena caused by synchronous rectifiers in parallel-module DC-DC converter system
Author :
Kohama, Teruhiko ; Ninomiya, Tamotsu ; Shoyama, Masahito
Author_Institution :
Dept. of Electr. & Electron. Syst. Eng., Kyushu Univ., Fukuoka, Japan
Abstract :
Problems of synchronous rectification in a parallel-module DC-DC power converter system are described. Excessive current and abnormal oscillation occur in the parallel system due to the inherent capabilities of the synchronous rectifier (such as bidirectional power flow and the cross-coupled topology of MOSFETs). The abnormal oscillation, which causes an excessive voltage stress, is analyzed and confirmed by experiments
Keywords :
AC-DC power convertors; DC-DC power convertors; circuit oscillations; load flow; power MOSFET; power semiconductor switches; rectifying circuits; switching circuits; abnormal oscillation; bidirectional power flow; cross-coupled MOSFET topology; excessive current; parallel-module DC-DC power converter system; synchronous rectification; synchronous rectifiers; voltage stress; DC-DC power converters; Diodes; Load flow; MOSFETs; Multichip modules; Power system reliability; Rectifiers; Stress; Switches; Voltage;
Conference_Titel :
Power Electronics Specialists Conference, 1998. PESC 98 Record. 29th Annual IEEE
Conference_Location :
Fukuoka
Print_ISBN :
0-7803-4489-8
DOI :
10.1109/PESC.1998.703163
