发明名称 |
SWITCHING POWER SUPPLY CIRCUIT |
摘要 |
<p>A switching power supply circuit that uses, as the core of a transformer or choke coil, a magnetic substance that is more difficult to be magnetically saturated than ferrite, while appropriately protecting a switching element. The switching power supply circuit comprises a transformer (20) that has primary and secondary side windings and also has a core including a magnetic substance of amorphous metal; a switching element (30) that causes a current to flow through the primary side winding of the transformer in accordance with a pulse-shaped drive signal; a primary side current detecting circuit (40) that detects a current following through the primary side winding of the transformer; a plurality of circuit elements that rectify and smooth a voltage developed across the secondary side winding of the transformer to generate an output voltage; and a control circuit (70) that generates, based on at least a detection result of the primary side current detecting circuit, the drive signal, while limiting a period during which to cause the current to flow through the primary side winding of the transformer.</p> |
申请公布号 |
WO2006101135(A1) |
申请公布日期 |
2006.09.28 |
申请号 |
WO2006JP305723 |
申请日期 |
2006.03.22 |
申请人 |
OKI POWER TECH CO., LTD.;SATO, HIDEO;KOBAYASHI, TAKAHIRO;TAKAHASHI, HIROAKI |
发明人 |
SATO, HIDEO;KOBAYASHI, TAKAHIRO;TAKAHASHI, HIROAKI |
分类号 |
H02M3/28;H02M3/155 |
主分类号 |
H02M3/28 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|