This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

CSD19538Q3A: How to find Rds(on) in specific application

Part Number: CSD19538Q3A
Other Parts Discussed in Thread: TPS23880


I would like to have some help about the CSD19538Q3A. 

My application is the folowing : 

When transistor is ON, it closes a circuit and a current of 1.25 A is flowing through the transistor. The gate is controlled from 10 V to 12.5 V. 

When transistor is OFF, it opens the circuit and there is no current flowing. 

To check if the transistor as an enough SOA, I need to know the exact value of Vds. How to know it ?

I though to use Rds (on) to calculate Vds (because used in ohmic region)  : Vds = Rds (on) = Ids 

Rds (on) is given figure 7 page 5 but for a Ids = 5A.

Thank you for your help