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专利名称：Switching power supply
发明人：Tatsuya Hosotani,Hiroshi Takemura申请号：US10541374申请日：20041108公开号：US07821239B2公开日：20101026
专利附图：
摘要：A switching power-supply unit uses a time when a transformer voltage Vtinverts due to a rectifier diode (Ds) entering a non-conducting state as a trigger, and afirst switching control circuit (CNT) turns on a first switching element (Q) after apredetermined delay time passes. A second switching control circuit (CNT) turns on a
second switching element (Q) using a time when the transformer voltage Vt inverts dueto turning off of the first switching element (Q) as a trigger. A third switching controlcircuit (CNT) turns on a third switching element (Q) using turning off of the secondswitching element (Q) as a trigger. The first switching control circuit (CNT) determines aperiod ton of the first switching element (Q) such that a first output voltage Vo is set to apredetermined value. The second switching control circuit (CNT) determines an ON-period ton of the second switching element (Q) such that a second output voltage Vo isset to a predetermined value. The third switching control circuit (CNT) determines an ON-period ton of the third switching element (Q) such that a third output voltage Vo is set toa predetermined value.
申请人：Tatsuya Hosotani,Hiroshi Takemura
地址：Muko JP,Muko JP
国籍：JP,JP
代理机构：Keating & Bennett, LLP
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