Sure but that doesn't take into account charger efficiency.
Something designed to output 5V-48V might be quite inefficient at generating an asked for 6.65V, perhaps. Optimizing just for the device might be missing gobs of energy efficiency that could easily be found with a little testing & discovery.
There's decent odds that a good PPS implementation on the device - one that can directly connect the supply and battery without having to do intermediary conversions - is the most efficient option. PPS probably is the best choice. But it's not guaranteed. And particularly as we create higher power higher voltage capable chargers, their optimization point might be tuned to much bigger outputs (where they will absolutely require that efficiency to keep cool enough under load). Losses from running your charger sub-optimally could dwarf losses from the device receiving power sub-optimally for it.
The point seems to hold: we need data to know what the best option to do is. This submission showed one way of DIY'ing that data, but devices could also do better jobs self-reporting, which would let everyone tune better.
jauntywundrkind|2 years ago
Something designed to output 5V-48V might be quite inefficient at generating an asked for 6.65V, perhaps. Optimizing just for the device might be missing gobs of energy efficiency that could easily be found with a little testing & discovery.
There's decent odds that a good PPS implementation on the device - one that can directly connect the supply and battery without having to do intermediary conversions - is the most efficient option. PPS probably is the best choice. But it's not guaranteed. And particularly as we create higher power higher voltage capable chargers, their optimization point might be tuned to much bigger outputs (where they will absolutely require that efficiency to keep cool enough under load). Losses from running your charger sub-optimally could dwarf losses from the device receiving power sub-optimally for it.
The point seems to hold: we need data to know what the best option to do is. This submission showed one way of DIY'ing that data, but devices could also do better jobs self-reporting, which would let everyone tune better.
Scoundreller|2 years ago