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1. (WO2009128217) SWITCHING POWER SUPPLY APPARATUS

Pub. No.:    WO/2009/128217    International Application No.:    PCT/JP2009/001596
Publication Date: Oct 22, 2009 International Filing Date: Apr 7, 2009
IPC: H02M 7/48
Applicants: PANASONIC CORPORATION
パナソニック株式会社
MIYAKE, Eiji
三宅永至
KOMATSU, Akeyuki
小松明幸
Inventors: MIYAKE, Eiji
三宅永至
KOMATSU, Akeyuki
小松明幸
Title: SWITCHING POWER SUPPLY APPARATUS
Abstract:
A switching power supply apparatus wherein heat generation from a power supply is suppressed to improve efficiency of conversion during power supply operation and only a current which flows through a load is detected correctly to moreover stabilize control. Since a fourth inductor (25d) and a second inductor (25b) functioning as current paths of AC outputs to be supplied to the load (28) are not contained in a first closed loop formed of a fourth diode (27d), a third inductor (25c), and a fourth electronic switch (24d) and a second closed loop formed of a second diode (27b), a first inductor (25a), and a second electronic switch (24b), unnecessary current flows through neither the first nor second closed loops.