发明名称 |
DC-DC converter which compensates for load variations |
摘要 |
A DC-DC converter includes a primary side circuit for allowing a switching device to perform on/off operations to output energy in a primary coil of a transformer to a secondary coil. A secondary side circuit rectifies and smooths a voltage outputted from the secondary coil so as to output a DC-DC voltage. A voltage-detecting circuit rectifies and smooths a voltage outputted from a voltage-detecting coil provided in the transformer so as to output the voltage as a detected voltage corresponding to a voltage to be outputted from the secondary side circuit. A control circuit applies to the switching device a pulse control signal used for controlling on/off operation of the switching device according to the voltage outputted from the voltage-detecting circuit. A primary side current-detecting circuit converts a working current in the primary side circuit, the working current corresponding to a current in the secondary side circuit, for performing detection thereof, and for superposing the thus detected voltage corresponding to the working current with the detected voltage outputted from the voltage-detecting circuit so as to compensate for an amount of variation of an output voltage of the secondary side circuit. The variation is attributed to a variation of the working current in the secondary side circuit. A voltage determined by the superposed voltage is applied to the control circuit.
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申请公布号 |
US6314005(B1) |
申请公布日期 |
2001.11.06 |
申请号 |
US19990392998 |
申请日期 |
1999.09.09 |
申请人 |
MURATA MANUFACTURING CO., LTD. |
发明人 |
NISHI KOJI;KITAMURA KOJI;TSUJI HITOSHI;NISHIYAMA TAKAYOSHI;MATSUMOTO YOSHIHIRO;MATSUMOTO TADAHIKO |
分类号 |
H02M3/28;H02M3/335;(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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