发明名称 |
DC power supply apparatus |
摘要 |
A DC power source device comprises a MOS-FET 5 which performs the intermittent switching operation for converting DC input from a DC power supply 1 into high frequency electric power; a control circuit 9 for turning MOS-FET 5 on and off; and a rectifying smoother 6 for converting the high frequency electric power through MOS-FET 5 into a DC power output supplied to a load 50. Control circuit 9 comprises an output current controller 11 for controlling the on-off term of MOS-FET 5 to make DC output current I<SUB>O </SUB>through load 50 settle toward a rated value I<SUB>OMAX</SUB>; a shunt regulator 24 for receiving a drive current I<SUB>SH </SUB>supplied from rectifying smoother 6 and producing a reference voltage V<SUB>R1 </SUB>to regulate the rated value I<SUB>OMAX </SUB>of output current controller 11; and a constant current source 32 for keeping drive current I<SUB>SH </SUB>on a substantially constant level under the rated output current value condition and reduced output voltage condition. Constant current source 32 functions to supply shunt regulator 24 with minimum drive current I<SUB>SH </SUB>to maintain reference voltage V<SUB>REF </SUB>on a constant level under the reduced output voltage, and also to control drive current I<SUB>SH </SUB>to shunt regulator 24 to a necessary but minimum level under the rated value of DC output current.
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申请公布号 |
US7239533(B2) |
申请公布日期 |
2007.07.03 |
申请号 |
US20050538386 |
申请日期 |
2005.06.13 |
申请人 |
SANKEN ELECTRIC CO., LTD. |
发明人 |
FUKUMOTO YUKINARI;OSAKA SYOHEI;TAKEUCHI TOSHIROU |
分类号 |
H02M3/335 |
主分类号 |
H02M3/335 |
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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