AN2344功率MOSFET雪崩特性和评分

AN2344功率MOSFET雪崩特性和评分

AN2344
Application Note

Power MOSFET avalanche characteristics and ratings

Introduction
Back in the mid-80s, power MOSFET manufacturers started to claim a new outstanding
feature: Avalanche Ruggedness.
Suddenly, new families of devices evolved, all with this “new” feature. The implementation
was quite simple: the vertical MOSFET structure has an integral body drain diode which
cannot be eliminated. By changing some process and layout parameters, it is possible to
guarantee the use of the clamping capability of this diode