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VNF9Q20F and VNF1048FTR: How to get I2t Curve

Bogdan14
Associate

Hello,

I am working with these two IC's to try and create an SPI programable power distribution module. For the VNF9Q20F I understand that you set Inom and Tnom to get your desired curve. My question is how do you know what Tnom you would need to select for your application? I attempted to create an I2t graph based off the information from the datasheet but all it mentions is that the first step is 1.03 * Inom and the last step is 10*Inom but nothing in between those steps. Ideally I would like to obtain a graph similar to figure 7 from the datasheet and compare it to various wire gauges. The datasheet also briefly mentions the FIXED_DROP (table 12) but I do not understand what it is trying to represent.

From this link (page 9), it mentions that there is an eFuse Simulator tool but I cannot seem to find it. 
https://www.st.com/content/dam/ces23/pdf/sti2fuse-presentation-ces-2023.pdf

 

For the VNF1048FTR, my question remains the same; I understand the correlation between Voc_thrs and current through the external FET, but how would I determine what tNOM I should select in order to ensure my wire is correctly protected with this eFuse?

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