发明名称 |
Switching power supply unit |
摘要 |
An RCC type switching power supply unit with a transformer having a primary winding, a secondary winding, and a feedback winding, a main switching element receiving a feedback signal from the feedback winding and for turning on and off the current of the primary winding, a rectifying and smoothing circuit having a rectifying element and a smoothing element connected to the secondary winding, and a control circuit connected between the feedback winding and the control terminal of the main switching element. A delay circuit by which the turning on of the main switching element is prohibited for a certain period of time after the current of the rectifying element has become zero and a switching circuit by which the delay time of the delay circuit is changed by two or more stages are provided.
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申请公布号 |
US6529392(B2) |
申请公布日期 |
2003.03.04 |
申请号 |
US20010948281 |
申请日期 |
2001.09.06 |
申请人 |
MURATA MANUFACTURING CO., LTD. |
发明人 |
NISHIDA AKIO;TANI RYOTA;NAKAHIRA KOJI |
分类号 |
H02M3/28;H02M3/338;(IPC1-7):H02M3/335 |
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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