Power supplies needed for DCDC

[zenerbjt]

Dear Engineers

We need the following power outputs (isolated)
24V, 5A;    12V,10.84A;   

These must come from a 14S Battery of voltage 42V-58.8V
We also need the same power outputs from a 24S Battery of voltage  72-100.8V

I can find Vicor modules for this, but the Boss wants to find cheaper alternatives.
PCB is 175 x 50mm approx

Would you agree that this is basically Vicor territory?
....And that almost nothing else would do

[NiHaoMike]

We need the following power outputs (isolated)
24V, 5A;    12V,10.84A;   

These must come from a 14S Battery of voltage 42V-58.8V

That's very common for telecom and IT equipment designed to run from 48V. Plenty of modules and designs for that.

We also need the same power outputs from a 24S Battery of voltage  72-100.8V

You might be able to get a standard PSU with active PFC to run on that, although the low end might have problems with startup and you'll have to derate the power rating substantially.

[zenerbjt]

Yes, we need small size and so as you know we cant use custom design as standard transformers are big compared to the wee little integrated ones they use in these vicor modules.
PCB is 150x75mm.

I am just wondering if there are alternatives in DCDC modules to vicor?

I searched digikey with a fine tooth comb but only found one flex power dcdc modules....but  i never heard of them before and i wonder if they would have supply issues, whereas vicor can definetely supply parts

[ahbushnell]

Dear Engineers

We need the following power outputs (isolated)
24V, 5A;    12V,10.84A;   

These must come from a 14S Battery of voltage 42V-58.8V
We also need the same power outputs from a 24S Battery of voltage  72-100.8V

I can find Vicor modules for this, but the Boss wants to find cheaper alternatives.
PCB is 175 x 50mm approx

Would you agree that this is basically Vicor territory?
....And that almost nothing else would do

When you compare Vicor to other options be sure to include the external components that are required. You can find the requirements in the Vicor data sheet.   

[zenerbjt]

Thanks, though i believe virtually all vendors DCDC modules at 100W+ will need external bypass caps at input/output, and also external fuse, as a minimum?

[Doctorandus_P]

Meanwell power supplies have a name for having a good compromise between price and reliability.
I don't know Vicor, nor what sort of quality and reliability your boss expects from a power supply.

I can give you some pictures of cheap chinese garbage where thermal paste is smeared over the power transistors and diodes after mounting them, or where these components are not mounted flat to the outside for cooling. I do use these cheap things, but I would not dare using them without checking such details myself. This can easily cost half an hour for each power supply, which does not make much sense for a business model.