Hi Ben,
Sorry for the slow reply. Our PoE expert is on vacation this week and will be back on Monday and can help address these questions. I see an email chain has been started on this topic, so I will close this thread and continue the discussion on…
Hi Navi,
Closing this thread, because we have multiple open for the same issue. Please see my response on this other thread:
https://e2e.ti.com/support/tools/simulation-hardware-system-design-tools-group/sim-hw-system-design/f/simulation-hardware…
Hi Navi,
Looks like we have multiple threads active for the same question. I have posted a response on your other thread; https://e2e.ti.com/support/tools/simulation-hardware-system-design-tools-group/sim-hw-system-design/f/simulation-hardware-system…
Hi Johny,
You might want to consider using one of our "Power Stage" devices that integrate the drivers and can be easily controlled by a PWM signal. The CS97370Q5M looks like a good match to your input, output and Fsw.
Thanks,
Brian
Hi Mohamed,
Most AC/DC reference designs will use a power supply topology that contains a transformer. We do have some lower power designs that use a buck topology without a transformer like PMP21487 for example.
thanks,
Brian
Hi Jonathon,
You are correct, variant A is preferred. With variant B, the high-side, HV FET is always passing current. A 85VAC-265VAC QR or valley switching flyback is very common, low cost and fairly efficient. The valley switching reduces switching…
Hi Umamaheswararao,
The problem is not with the topology, but the 4-switch buck-boost controllers are not rated for that high of voltage. The LM5177 ( https://www.ti.com/product/LM5177 ) can be used up to 80V.
thanks, Brian
