Sample Numerical Calculations for N-Power Delivery
Let us do some simple calculations to illustrate the principles we have learned. Let us stick to single-pair here.
Case 1: No PSE-side current limit, no PD-side UVLO
This would be the maximum theoretical power delivery. Suppose we have 300 m of single-pair CAT3-type cable (AWG 26). We can take the two-pair resistance either as 20 /100 m, which actually includes patch cables and several contact resistances. Or we can take 15 /100 m for AWG 26. Let us take the former number just to give us some ...