crazifunguy
New member
**required core too large**
It seems that no matter what I try 30A requires a massive inductor even with 500Khz. I am gonna explore new ideas that use multiple inductors. I am still thinking that this type of power supply at this power level is just not ideal size or cost wise.
Here are the Inputs - Outputs - Results Using the TI Calculator UCC28019
View attachment 403View attachment 404View attachment 405
Here are the Inputs - Outputs - Results Using the TI Calculator UCC28019
View attachment 403View attachment 404View attachment 405
The frequency is fixed with that controller IC
Is it safe to use just the RMS current for the inductor design?
I agree with that. I am going to just prototype a design using the worst case current rounded. 85V 1400W.....Approx 15A. Once I have something to play with I can test it and see if it can handle the current draw.....If it fails I can always rebuild it. 15A sounds like a good starting point. CHEER.... Happy New Year...
Hello SMPS Community
I am working on a SMPS that I would like to use for some amps I want to build. I have some schematics for a CCM PFC and a DC-DC converter. The design could meet class D and 80+ specs according simulation tests. I do however have some questions. I am well rounded in electronics but I need some design help. Here are my specs so far.
PFC Input Voltage
85V - 265V AC 50/60HZ
PFC Output Voltage
400V DC
~4A
DC-DC Converter Output Voltage
+70V 10A -70V 10A
Total Power ~1400W
Topology
CCM PFC with Half Bridge DC-DC
View attachment 345
Using PowerEsim
L1 L2 & L3 are shown using 8 AWG wire. This seems too large. How do I calculate a proper wire size for these chokes and inductors??