发明名称 |
Active overvoltage control for inductive load driving. |
摘要 |
<p>A circuit for limiting the transitory's overvoltage across a power transistor connected essentially in series with an inductive load between a supply rail and a ground rail of the circuit and operated to switch ON-OFF said inductive load utilizes a comparator circuit for switching-ON again the power transistor in order to discharge the energy stored in the load's inductance. The voltage across the power transistor is sensed by a first voltage divider, while a reference voltage is obtained by means of a second voltage divider connected between the supply and ground. The circuit is practically insensitive to temperature and to variations of the supply voltage and is easily implemented.</p> |
申请公布号 |
EP0311576(A2) |
申请公布日期 |
1989.04.12 |
申请号 |
EP19880830401 |
申请日期 |
1988.10.04 |
申请人 |
SGS-THOMSON MICROELECTRONICS S.R.L. |
发明人 |
GARIBOLDI, ROBERTO;GOLA, ALBERTO |
分类号 |
G05F3/16;G05F1/10;G05F1/56;H01H47/22;H02H9/04;H03K17/082;H03K17/16;H03K17/64 |
主分类号 |
G05F3/16 |
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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