发明名称 |
Switching power supply device, semiconductor device, and control method |
摘要 |
A plurality of arrangements for detecting an overload of energy supplied to an output part enables selecting latch-off or auto-recovery overload protection by the operation of a switching device. When the drain current peak of the switching device exceeds a predetermined level denoting an overload, the FB pin voltage also rises to latch off, and when the drain current peak then reaches a maximum level, the CC pin voltage drops to a predetermined level and limits the oscillation period of the switching device because output power cannot be increased even if the load increases further. Latch-off overload protection can be applied when the drain current peak exceeding a predetermined level is detected, and auto-recovery overload protection can be applied when the CC pin voltage is detected to drop to a predetermined level.
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申请公布号 |
US2007064358(A1) |
申请公布日期 |
2007.03.22 |
申请号 |
US20060525716 |
申请日期 |
2006.09.22 |
申请人 |
MURATA KAZUHIRO;YAMASHITA TETSUJI;MORI YOSHIHIRO |
发明人 |
MURATA KAZUHIRO;YAMASHITA TETSUJI;MORI YOSHIHIRO |
分类号 |
H02H7/00 |
主分类号 |
H02H7/00 |
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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