Feels like the right forum, but I could be wrong.
One of my "slow burn" projects is moving all of the critical gear in my rack to DC input, using the "normal" UPS output for unmodifiable(or not yet modified) equipment mostly. This allows for much better "on battery" time during power outages, in some cases much better efficiency than a terrible power brick or cheap PSU (yes, I could buy high quality replacement power bricks or PSUs, but if I'm going to spend the money I might as well achieve multiple goals).
I'm currently using a few DC-ATX PSUs, one is a "name brand" (of sorts) pico PSU, and another 2 generic/ebay jobs. I've been looking at getting into Lithium Iron Phosphate batteries which are "48V" (nominal charged voltage is about ~52v and charging voltage can get close to 60V). Most/all of the "wide range" DC-ATX PSUs cap out around 28v/32v. Does anyone know of quality DC-ATX/pico PSUs that can tolerate 60v? Or am I better off with a quality DC-DC to step down to ~12.1-12.2 (to account for some droop) and use 12v DC-ATX PSUs which expect a steady 12v supply.
I would expect feeding even a high quality buck converter into a 12v DC-ATX would require some additional filtering and bulk-caps close to the inputs. Am I better off using a single high quality high capacity buck converter for 12V output, or one converter per PSU? (assuming at this stage we are not dealing with adding redundancy.
Unfortunately most of the more commercial DC-ATX psus seem to be telco standard, which means positive ground (AKA, -48V, not 48V).
One of my "slow burn" projects is moving all of the critical gear in my rack to DC input, using the "normal" UPS output for unmodifiable(or not yet modified) equipment mostly. This allows for much better "on battery" time during power outages, in some cases much better efficiency than a terrible power brick or cheap PSU (yes, I could buy high quality replacement power bricks or PSUs, but if I'm going to spend the money I might as well achieve multiple goals).
I'm currently using a few DC-ATX PSUs, one is a "name brand" (of sorts) pico PSU, and another 2 generic/ebay jobs. I've been looking at getting into Lithium Iron Phosphate batteries which are "48V" (nominal charged voltage is about ~52v and charging voltage can get close to 60V). Most/all of the "wide range" DC-ATX PSUs cap out around 28v/32v. Does anyone know of quality DC-ATX/pico PSUs that can tolerate 60v? Or am I better off with a quality DC-DC to step down to ~12.1-12.2 (to account for some droop) and use 12v DC-ATX PSUs which expect a steady 12v supply.
I would expect feeding even a high quality buck converter into a 12v DC-ATX would require some additional filtering and bulk-caps close to the inputs. Am I better off using a single high quality high capacity buck converter for 12V output, or one converter per PSU? (assuming at this stage we are not dealing with adding redundancy.
Unfortunately most of the more commercial DC-ATX psus seem to be telco standard, which means positive ground (AKA, -48V, not 48V).