Thank you for your feedback. Gerald
On Mon, Jul 4, 2016 at 3:18 PM, <[email protected]> wrote: > First of all making changes on design "tomorrow" is irresponsible, so I > never request it. But good to know where is some "leak" in design. For > example it is help to make workaround. > > "TI did not write that specification" > No, but use it in all reference design. See TI TPS20x1 PDS > application information. See for example TPS2051 docu Fig 33. > > "If you put the CAP after the switch then ..." > Then why CAP placed OUT of PDS in all TI application information? > Because PDS has soft start feature which prevent overload IN (BBB SYS > power rail). See for example TPS2051 docu Fig 4 and 8. > Fig 8 is perfect draw for this. The soft start feature limit charge of > 100uF to 0,5A, therefore current never exceed USB1 and 2 current limit, > therefore no dip on IN. > This is one main function of PDS. > > "I did not design the board for your application" > It is not required. But during research work to specify our problem I > found many topic where users discover mysterious problems with power > supply, and try to found a right one for BBB. This can be originated from > startup current peak. > > -- > 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/b974f98a-0cff-4380-af1f-9ce5db9e199f%40googlegroups.com > <https://groups.google.com/d/msgid/beagleboard/b974f98a-0cff-4380-af1f-9ce5db9e199f%40googlegroups.com?utm_medium=email&utm_source=footer> > . > > For more options, visit https://groups.google.com/d/optout. > -- Gerald [email protected] http://beagleboard.org/ [email protected] -- 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/CAHK_S%2BcAH_U%3DVtJmLq62wrVPmRg8%2Bn27YjWM_oeorZezSTKorQ%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
