On the TI product page http://www.ti.com/product/tps65217B#feature is the information about current limit:
"Two Independent Load Switches That Can Be Configured as LDOs Configured as LDOs: - LDO Output Voltage Range: 1.5 V – 3.3 V - VIN Range: 2.7 V – 5.8 V *- 200-mA Current Limit (TPS65217A, B)* *- 400-mA Current Limit (TPS65217C, D)"* Or maybe i'm wrong? W dniu środa, 20 listopada 2013 10:03:54 UTC+1 użytkownik lisarden napisał: > > Can you prove it? You mean it can supply more current? :) > > But tps65217C (in BBB) has a more power availability vs. tps65217B (in > BBW). > > > > 2013/11/20 Jakub Żymełka <zymelk...@gmail.com <javascript:>> > >> Ok, I see. >> But tps65217C (in BBB) has a more power availability vs. tps65217B (in >> BBW). >> Reducing the CPU speed is not the solution. For example I would like to >> work with a clock speed of 1GHz. >> >> So, are You suggesting that the PMIC is incorrect? >> Can anyone else give an opinion? Maybe the designers of the new BBB? >> >> Best regards, >> Jakub. >> >> >> W dniu środa, 20 listopada 2013 08:42:18 UTC+1 użytkownik lisarden >> napisał: >>> >>> Jakub, answering to your question: >>> tps65217b is not tps65217b (bbb) >>> Bbw 600mhz vs bbb 1000mhz >>> Ddr2 pwr consumption != ddr3 >>> >>> That is why when people reduce the cpu freq systems become stable, but I >>> don't think it can help because I run my board in cpu ondemand governor and >>> it still reboots. However when running ezsdk my system seems to be stable >>> while on Ubuntu it reboots randomly >>> 20 нояб. 2013 г. 10:53 пользователь "Jakub Żymełka" <zymelk...@gmail.com> >>> написал: >>> >>> Lei Wang, >>>> yes, You can just use a wire to connect SYS_5V and VDD_5V after boot >>>> up. >>>> We've done this before we choose the option with the transistor. >>>> >>>> We are working on the 04.2013 U-boot, so we will try the newest version >>>> 10.2013 and I will let you know about my results. >>>> >>>> lisarden, >>>> According to you, the power management unit ( tps65217 ) in the BBB is >>>> not able to provide enough power by single pin? >>>> So why in the BBWhite or with the 3.8 kernel is no any random reboot? >>>> The PMIC is exactly the same... >>>> >>>> >>>> >>>> W dniu wtorek, 19 listopada 2013 20:05:34 UTC+1 użytkownik lisarden >>>> napisał: >>>>> >>>>> this issue can probably be because tps65217 simply can't handle too >>>>> much current through a single pin. If an internal switch AC|USB=SYS get >>>>> overheated then it can just shutdown to avoid a system damage >>>>> >>>>> >>>>> 2013/11/19 Lei Wang <lei...@gmail.com> >>>>> >>>>>> The time jumping issue seems to relate to u-boot per Robert Nelson's >>>>>> suggestion (https://groups.google.com/forum/#!category-topic/ >>>>>> beagleboard/beaglebone-black/xPxzYyNsA78). I dropped in a newer >>>>>> u-boot images. It seems to fix the problem. >>>>>> >>>>>> For the random reboots, I limited the CPU clock frequency to 500MHz. >>>>>> It seems that the board is running more robust. So far I didn't see any >>>>>> random reboot. However I still don't understand why it seems that >>>>>> Angstrom >>>>>> or 3.8 Android images make the difference. >>>>>> >>>>>> Connect SYS_5V and VDD_5V? Since I noticed by connecting the board to >>>>>> a USB port (i.e. adb) seems to stop the random reboot, I wonder if it >>>>>> has >>>>>> something to do with VDD_5V and SYS_5V. I will do a little bit more >>>>>> digging >>>>>> into the schematic. >>>>>> >>>>>> For test purpose can I just use a wire to connect SYS_5V and VDD_5V >>>>>> after boot up? >>>>>> >>>>>> Thanks! >>>>>> >>>>>> Lei >>>>>> >>>>>> >>>>>> On Tuesday, November 19, 2013 6:38:49 AM UTC-5, Jakub Żymełka wrote: >>>>>>> >>>>>>> My BBB is A5C version. We've tested more than 10 pcs BBB and all of >>>>>>> it has the same problem... >>>>>>> One, but not very elegant solution is to after start the board, make >>>>>>> a jumper between pins SYS_5V and VDD_5V, in example with any mosfet >>>>>>> transistor. >>>>>>> With this jumper, on kernel 3.2 there was no reset from the time of >>>>>>> three weeks. >>>>>>> Anybody have any other solutons? Because this cannot be the final. >>>>>>> >>>>>>> Best regards! >>>>>>> I look forward for suggestions! >>>>>>> Jakub. >>>>>>> >>>>>>> >>>>>>> W dniu piątek, 8 listopada 2013 05:12:08 UTC+1 użytkownik Lei Wang >>>>>>> napisał: >>>>>>>> >>>>>>>> I have the same problem with BBB running Android. I tested TI >>>>>>>> prebuilt Android JB4.2 image. We have two versions of BBBs (A5A and >>>>>>>> A5C). >>>>>>>> Both of them have the issue. >>>>>>>> >>>>>>>> I posted my question on Ti e2e website: http://e2e.ti.com/sup >>>>>>>> port/embedded/android/f/509/p/297726/1049885.aspx#1049885 >>>>>>>> >>>>>>>> However it seems that the problem goes away when I load Angstrom >>>>>>>> image (based on 3.8 kernel). Also if I use Andrew Henderson's >>>>>>>> Android image (also 3.8), the problem goes away. However we cannot use >>>>>>>> Andrew's image since there are a lot drivers are missing. >>>>>>>> >>>>>>>> I also have the time jump forward problem. The problem goes away >>>>>>>> when I switch to 3.8 kernel. >>>>>>>> >>>>>>>> Jakub, may I ask what version is your BBB? >>>>>>>> >>>>>>>> >>>>>>>> Lei >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> On Wednesday, November 6, 2013 4:11:52 AM UTC-5, Jakub Żymełka >>>>>>>> wrote: >>>>>>>>> >>>>>>>>> There are no hints or any solutions...?? >>>>>>>>> Please help! >>>>>>>>> >>>>>>>>> W dniu środa, 23 października 2013 13:09:00 UTC+2 użytkownik Jakub >>>>>>>>> Żymełka napisał: >>>>>>>>>> >>>>>>>>>> Hello! >>>>>>>>>> I have a problem. It is based on an involuntary resetting of the >>>>>>>>>> BBBlack. >>>>>>>>>> This happens occasionally. About once a day. Totally when you >>>>>>>>>> least expect it. >>>>>>>>>> This happens more often on higher frequencies ( 800Mhz, 1Ghz). >>>>>>>>>> On the console at the time of reset, nothing extra is displayed. >>>>>>>>>> No error's about kernel panic, sync, segmentation fault or another. >>>>>>>>>> Just like the same as if I pressed the reset button located on >>>>>>>>>> the board - but I DIDN'T! >>>>>>>>>> I'm working on Koenkoi's linux-kernel ti33x-psp-3.2.28-r16c- >>>>>>>>>> gitr720e07b4c1f687b61b147b31c698cb6816d72f01 + a few changes to >>>>>>>>>> run on the BBB. >>>>>>>>>> https://github.com/koenkooi/linux/archive/linux-ti33x-psp-3. >>>>>>>>>> 2.28-r16c+gitr720e07b4c1f687b61b147b31c698cb6816d72f01.zip >>>>>>>>>> Kernel is exactly the same as in the Angstrom release. >>>>>>>>>> I would add, that on the BBW nothing bad happens, everything is >>>>>>>>>> working properly. >>>>>>>>>> Anyone has already had a similar situation? >>>>>>>>>> If it is necessary I can send the kernel patch and configuration >>>>>>>>>> file. >>>>>>>>>> >>>>>>>>>> Best regards! >>>>>>>>>> I look forward for suggestions! >>>>>>>>>> Jakub. >>>>>>>>>> >>>>>>>>> -- >>>>>> 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 beagleboard...@googlegroups.com. >>>>>> For more options, visit https://groups.google.com/groups/opt_out. >>>>>> >>>>> >>>>> >>>>> >>>>> -- >>>>> LinkedIn - http://www.linkedin.com/in/maximpodbereznyy >>>>> Company - http://www.linkedin.com/company/mentorel >>>>> Facebook - https://www.facebook.com/mentorel.company >>>>> >>>> -- >>>> 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 beagleboard...@googlegroups.com. >>>> For more options, visit https://groups.google.com/groups/opt_out. >>>> >>> -- >> 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 beagleboard...@googlegroups.com <javascript:>. >> For more options, visit https://groups.google.com/groups/opt_out. >> > > > > -- > LinkedIn - http://www.linkedin.com/in/maximpodbereznyy > Company - http://www.linkedin.com/company/mentorel > Facebook - https://www.facebook.com/mentorel.company > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. 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