发明名称 |
Active thermal protection for switches |
摘要 |
A system and method include a controller that reduces power dissipated by a switch, such as a source-controlled field effect transistor, when an estimated amount of power dissipated by the switch exceeds a predetermined threshold. Reducing the power dissipated by the switch prevents damage to the switch due to overheating. The controller determines the estimated amount of power dissipated by the switch using actual drain-to-source current and drain voltage data. In at least one embodiment, the controller includes a fail-safe, estimated power dissipation determination path that activates when the drain voltage data fails a reliability test. Additionally, in at least one embodiment, the controller includes a model of thermal characteristics of the switch. In at least one embodiment, the controller utilizes real-time estimated power dissipation by the switch and the model to determine when the estimated power dissipated by the switch exceeds a power dissipation protection threshold. |
申请公布号 |
US9184666(B2) |
申请公布日期 |
2015.11.10 |
申请号 |
US201313833587 |
申请日期 |
2013.03.15 |
申请人 |
|
发明人 |
Sood Mohit;Isaacson Spencer;Singh Rahul;He Zhaohui |
分类号 |
H05B37/02;H05B39/04;H05B41/36;H02M3/335;H03K17/14;H05B33/08 |
主分类号 |
H05B37/02 |
代理机构 |
Terrile, Cannati, Chambers & Holland, LLP |
代理人 |
Terrile, Cannati, Chambers & Holland, LLP ;Chambers Kent B. |
主权项 |
1. A method comprising:
controlling conductivity of a switch; estimating an amount of power dissipated by the switch; determining if the estimated power dissipated by the switch exceeds a first predetermined threshold value; and reducing the power dissipated by the switch when the estimated power dissipated by the switch exceeds the first predetermined threshold value. |
地址 |
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