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How to calculate drain current that i will supply in HPA

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contral

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Hi:

How to calculate drain current that i will supply in HPA ?

assuming the output power is 15W, Vdd=28V, the drain efficiency is 25%, and give 60% margin. Attachment is a part of the datasheet.
my calculate method is :

Pdc = 15W/25% = 60W
Idc = (60/28 ) / 60% = 3.6A

Am I right? If wrong,please give me some design guide

thanks

cntral
 

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