UPS120 Просмотр технического описания (PDF) - Microsemi Corporation
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UPS120 Datasheet PDF : 5 Pages
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Preliminary Data
UPS120
Preliminary Data
Preliminary Data
* Reverse power dissipation and the possibility of thermal runaway must be considered when operating this device under any reverse
voltage conditions. Calculations of TJ therefore must include forward and reverse power effects. The allowable operating TJ may be
calculated from the equation:
TJ = TJmax = r(t)(Pf + Pr) where
r(t) = thermal impedance under given conditions.
Pf = forward power dissipation, and
Pr = reverse power dissipation
This graph displays the derated allowable TJ due to reverse bias under DC conditions only and is calculated as TJ = TJ max - r(t)Pr,
Where r(t) = Rthja. For other power applications further calculations must be performed.
MSC0889.PDF 07-31-98
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