Before I forgot.
TPS not limit output capacitors, but recommend 22+10+10+10+10=62 uF. BBB use 100+10+10+10+10+10=140 uF. This is more than twice than recommended. Furthermore TPS recommend not only capacitance but ESR of capacitors too (as 20mOhm). This is determine start-up current too. BBB use C34 100uF as puffer to feed USB host connector. But it is not isolated from sys power line (need FBB?). Looks like this is where current peak originated from. TPS has soft start feature but only for DC-DC converters and LDOs. Therefore no soft start for capacitive load connected to SYS power line. It is advisable to add some part to SYS power line for further models (e.g. Green). But up to this moment I think it is recommended to use power supply with <=2.5A current limit to prevent damage of TPS. TPS has 3A absolute maximum current limit. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/5a139200-6034-4fd7-9885-db40303bb5a4%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
