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AN4337 датащи(PDF) 12 Page - STMicroelectronics

номер детали AN4337
подробное описание детали  power MOSFETs are considered rugged with respect to the avalanche
PDF  14 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN4337 датащи(HTML) 12 Page - STMicroelectronics

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Conclusions
AN4337
12/14
DocID025012 Rev 1
4
Conclusions
Understanding how to approach a voltage overshoot which exceeds the V(BR)DSS absolute
maximum rating is the key to designing reliable and, consequently, safe MOSFETs. The
example in this paper provides step-by-step guidelines on how to obtain the safety margin in
terms of IAR and EAS specifications when a MOSFET functions in a flyback converter. In
particular, this example suggests that a MOSFET device is safe if the avalanche energy is
lower than the EAS datasheet specification and the avalanche current is lower than the IAR
absolute maximum rating; vice versa, a MOSFET is certainly safe if the maximum
avalanche current is lower than IAR.



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