coulomb is the expert about all things in chargers, but as i recall the OBC takes either 120 or 240 vac at 60 Hz (or 50 Hz in other countries) and rectifies that into DC; this DC goes thru a Power Factor Correction stage that forces the mains voltage and current draw to be in phase. From there it goes into an L-C boost stage. Then this boosted DC is chopped thru a pair of high frequency H-bridges to create a high frequency AC voltage that is sent into a pair of transformers to raise the voltage even higher as needed. This high frequency AC output is then rectified thru dual bridge rectifiers to make the DC at the Pack level. It is filtered in the Output stage and sent to the Pack.
The overhead for the control board is the same in either case as it is powered from the 12V system.
i don't have any input/output power numbers but i'm sure somebody has that data for L1 and L2 comparison.
The overhead for the control board is the same in either case as it is powered from the 12V system.
i don't have any input/output power numbers but i'm sure somebody has that data for L1 and L2 comparison.