发明名称 |
Two stage thermal shutdown |
摘要 |
In an amplifier circuit the output devices are thermally coupled to a shutdown circuit. A first latch is designed to operate at a first high temperature excursion. The first latch operation acts to shut the output devices off and to invoke a second latch. The second latch operates between a low temperature and a second high temperature that is below the first high temperature. Thus, after the first latch operates, the second latch will operate to cycle between a low temperature whereupon it energizes the output devices and a high temperature at which it deenergizes the output devices. By this action, the circuit will permit only one high temperature peak after which it will cycle between a lower high temperature peak and a low temperature. This avoids repeated cycling to a high temperature that could be deleterious to the circuit devices or the package in which they are housed.
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申请公布号 |
US4345218(A) |
申请公布日期 |
1982.08.17 |
申请号 |
US19800185055 |
申请日期 |
1980.09.08 |
申请人 |
NATIONAL SEMICONDUCTOR CORPORATION |
发明人 |
CONGDON, JAMES S.;ISBELL, TIM D. |
分类号 |
H02H5/04;H03F1/52;(IPC1-7):H03F3/04 |
主分类号 |
H02H5/04 |
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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