I used Webench to find a couple of reasonable solutions for this application, which is a high power communications amplifier.
DC Input Voltage = 28.0VDC
DC Output Voltage = 49.0VDC
Output Current = 25.5A DC
Max temperature = 65°C
Total output power 1250W, DC
I have a solution for ~10A using either TPS40210 or TPS43060 - both of which can drive a load up to 10A (although it seems the designs are actually capable of more), and I need to combine three of them for my ~26A requirement.
So my question is - is there a better way than combining three discrete DC-DC boost converters? I do have the board space for three of them, and $ wise its ok, although it would be nice to run three converters off a single controller?
I searched through reference designs, but the high power capable supplies are AC-DC designs and use a different topology.
So assuming, this is the best approach, then can I just combine the three of them? Do I need to drive them out of phase so the ripple does not add? What is a good strategy for this - is it enough to use a micro to stagger the sync line in the case of TPS43060?
Thanks!
