发明名称 |
SWITCHING POWER SUPPLY UNIT |
摘要 |
A switching power supply unit includes a DC power supply, a transformer having a primary winding, a secondary winding and a feedback winding, a main switching element connected in series to the primary winding, and a control circuit connected between the feedback winding and the control terminal of the main switching element, so that a DC output can be obtained. In this switching power supply unit, there are provided a voltage generating unit disposed on the primary side of the transformer to output a voltage according to a load power, and a delay circuit fore reducing the switching frequency by delaying the turn-on of the main switching element according to a voltage output from the voltage generating unit thereby to prolong the OFF time of the main switching element.
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申请公布号 |
CA2296205(A1) |
申请公布日期 |
2000.07.18 |
申请号 |
CA20002296205 |
申请日期 |
2000.01.17 |
申请人 |
MURATA MANUFACTURING CO., LTD. |
发明人 |
NISHIDA, AKIO;NAKAHIRA, KOJI;TANI, RYOTA |
分类号 |
H02M3/28;H02M3/338;(IPC1-7):H02M3/36;H02M7/32 |
主分类号 |
H02M3/28 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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