发明名称 |
Monolithic clamping circuit and method of preventing transistor avalanche breakdown |
摘要 |
A monolithic clamping circuit (10) and a method of protecting a semiconductor power transistor (14) from entering avalanche breakdown. The semiconductor power transistor (14) controls the switching of an inductor (16). The monolithic clamping circuit (10) causes energy stored in the inductor (16) to be dissipated in the semiconductor power transistor (14). A voltage sense circuit (18) provides a feedback signal to a selector circuit (12) in response to a voltage at a collector terminal of the semiconductor power transistor (14). The selector circuit (12) switches the semiconductor power transistor (14) to the conductive mode when the feedback signal indicates a high voltage at the collector terminal of the semiconductor power transistor (14). Dissipating the energy stored in the inductor (16) while operating in the conductive mode prevents the semiconductor power transistor (14) from entering avalanche breakdown.
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申请公布号 |
US5789951(A) |
申请公布日期 |
1998.08.04 |
申请号 |
US19970791711 |
申请日期 |
1997.01.31 |
申请人 |
MOTOROLA, INC. |
发明人 |
SHEN, ZHENG;ROBB, STEPHEN P. |
分类号 |
H03K17/082;(IPC1-7):H03K19/082 |
主分类号 |
H03K17/082 |
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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