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LP87524J-Q1: How to calculate the input current ?

PYTsai
Genius 9315 points
Part Number: LP87524J-Q1

Hi 

In our application, we need to calculate the required input current to LP87524J-Q1

Below is our idea on how to calculate it, can you help review if any mistake or any item missed ? 

Our idea is to use this equation PI=PO+PD (Power Dissipation ) by calculate the required PI first. After got PI then use this equation PI=Vin*Iin to calculate the required input current. 

 

Thanks!