发明名称 |
Power regulation and thermal management circuit and method |
摘要 |
This invention provides a means of protecting power dissipating pass elements from exceeding their predetermined thermal limits. In one preferred embodiment, the circuit protects a pass element in a battery charging circuit from exceeding its threshold junction temperature by predicting temperature based upon the voltage across the pass element and the current flowing through it. From this predicted temperature, current is reduced to provide charging of a battery at a constant power. The circuit includes a voltage sensing circuit and a plurality of comparators for selecting a predetermined current based upon the output of the voltage sensing circuit. The circuit provides a piecewise linear approximation of proper pass element voltage and current values to maintain a suitable threshold junction temperature.
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申请公布号 |
US2003155899(A1) |
申请公布日期 |
2003.08.21 |
申请号 |
US20020077355 |
申请日期 |
2002.02.15 |
申请人 |
OGLESBEE JOHN WENDELL;THONGSOUK CHRIS HANCHANA;JOHNSON ROBERT MICHAEL |
发明人 |
OGLESBEE JOHN WENDELL;THONGSOUK CHRIS HANCHANA;JOHNSON ROBERT MICHAEL |
分类号 |
G05F1/565;H02M3/157;(IPC1-7):G05F1/44 |
主分类号 |
G05F1/565 |
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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