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I am including the TM4C1294 Launchpad in one of my designs, and I want to make sure I have enough capacity on my chosen power supply for the launchpad (as well as other components in my system). I just need to know the max and/or typical current consumption when powered from the 5V BoosterPack.
I've seen some specs for the chip itself (such as Tables 27-63 and 27-64 in the Tiva TM4C1294NCPDT Microcontroller datasheet), but I want to know what the overall launchpad is capable of drawing. Given that the two main components appear to be the microcontroller and the TM4C123GH6PMI, would it be appropriate to simply add their max consumptions together? Or are their other components on the launchpad that would draw non-trivial (ie higher than uA range) current?
I also see in the Launchpad datasheet that both the 5V and 3.3V output from the BoosterPacks are limited to 1A total, regulated by the TPS2052B and TPS73733, respectively, which I could do the calculations for with efficiency, etc., and add that to the consumptions of the two microcontrollers.
Rather than doing my own calculations, I'd prefer if there was just an existing spec for the launchpad I could use, but I don't see one. Any help would be appreciated.
Thanks,
Mike
Hello Mike
LaunchPads are "NOT" production designs. So if you make a commercial product out of it there is no TI liability. The simplest method to measure current is to load your program. Then remove the header on JP1 and connect a 5V supply with common GND to the Launchpad and measure the current using a multimeter (average current samples).