km191919
Newbie level 2
Hi there I just started working on a PoE design. I am using the mEZS84801A as a reference design as shown below. It uses the MP8007 PoE chip. I have modified and tested this PoE system successfully and my camera can be powered and it can run at 1 Gigabit.
Now I am in the phase of selecting components for the schematics and layout. However, the T2 coil 750316206 Wurth Np:Ns:Na=22:10:6, Lp=47.4μH, Core=EE13 47.4uH, cannot be found anywhere. The flyback transformer seems very specific to the designs, and the topologies seem to vary depending on PoE controller chip. I am having a lot of trouble trying to find an alternative for the design. My system runs on 12V and consumes ~10W. Does anyone have a transformer that can be an alternative to this one? Ideally would like to order on Digikey/Mouser and test out.
I have read that it is a step-up transformer with very large ratios but another thought is, I am also wondering if there is a way to use the transformer to output 5V to the system instead of 12V since most of my circuitry runs off 5V. I currently have a step down converter but seems like a waste of space. If not, any help with a replacement transformer would be so helpful. I have reached out to MPS but gotten no reponse. Any help or suggestions would be very much appreciated! Thank you in advance!
Now I am in the phase of selecting components for the schematics and layout. However, the T2 coil 750316206 Wurth Np:Ns:Na=22:10:6, Lp=47.4μH, Core=EE13 47.4uH, cannot be found anywhere. The flyback transformer seems very specific to the designs, and the topologies seem to vary depending on PoE controller chip. I am having a lot of trouble trying to find an alternative for the design. My system runs on 12V and consumes ~10W. Does anyone have a transformer that can be an alternative to this one? Ideally would like to order on Digikey/Mouser and test out.
I have read that it is a step-up transformer with very large ratios but another thought is, I am also wondering if there is a way to use the transformer to output 5V to the system instead of 12V since most of my circuitry runs off 5V. I currently have a step down converter but seems like a waste of space. If not, any help with a replacement transformer would be so helpful. I have reached out to MPS but gotten no reponse. Any help or suggestions would be very much appreciated! Thank you in advance!