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    • 4. 发明申请
    • SWITCHING POWER SUPPLY
    • 切换电源
    • US20080174276A1
    • 2008-07-24
    • US12016219
    • 2008-01-18
    • Fumikazu TAKAHASHIAkihiko KANOUDAMasahiro HAMAOGIYoshihide TAKAHASHI
    • Fumikazu TAKAHASHIAkihiko KANOUDAMasahiro HAMAOGIYoshihide TAKAHASHI
    • H02J9/00H02J7/02
    • H02J9/061H02M3/33561Y10T307/625
    • To provide a smaller and more efficient switching power supply 10. The switching power supply 10 according to the present invention includes: a high frequency transformer 40; a primary side switching circuit 30 adapted to switch a current flowing through a primary winding 41 of the high frequency transformer 40 to thereby generate predetermined voltages in a secondary winding 42 and an auxiliary winding 43 of the high frequency transformer 40; a secondary side rectifier 50 adapted to rectify a voltage generated in the secondary winding 42 of the high frequency transformer 40 to supply the rectified voltage to a load; a charging circuit 60 adapted to rectify a current flowing through the auxiliary winding 43 of the high frequency transformer 40 and switch the rectified current to thereby charge a secondary battery 70 at a constant current; and a switch 80 provided between the secondary battery 70 and the load, and supplies, when the voltage supplied to the load is interrupted, the voltage of the secondary battery 70 to the load without via the high frequency transformer 40.
    • 提供更小更高效的开关电源10。 根据本发明的开关电源10包括:高频变压器40; 初级侧切换电路30适于切换流过高频变压器40的初级绕组41的电流,从而在高频变压器40的次级绕组42和辅助绕组43中产生预定电压; 适于对在高频变压器40的次级绕组42中产生的电压进行整流以将整流电压提供给负载的次级侧整流器50; 充电电路60,用于对流过高频变压器40的辅助绕组43的电流进行整流,并切换整流电流,从而以恒定电流对二次电池70充电; 以及设置在二次电池70和负载之间的开关80,并且当提供给负载的电压被中断时,不经高频变压器40将二次电池70的电压提供给负载。