Max 5v current out

Reply to Max 5v current out on Thu, 14 May 2020 16:28:28 GMT

ajb2k3 — Thu, 14 May 2020 16:28:28 GMT

Hi,

I'm looking to make my own hat for my M5StickC and was looking to find the max current out available at 5v. Any ideas?

Thanks.

Depending on what kind of hat you are designing, you could design it so that it directly powers you device and supplies power to the stick instead of the stick supply the power.

Reply to Max 5v current out on Thu, 14 May 2020 13:44:21 GMT

Bese — Thu, 14 May 2020 13:44:21 GMT

You need to subtract the M5Stick's own consumption from these values.

M5Stick is using the AXP192 Power management IC, datasheet:
http://www.x-powers.com/en.php/Info/support/article_id/29
M5Stick schematic:
https://docs.m5stack.com/#/en/core/m5stickc

@klimbot probably powered his M5stick via USB.

Reply to Max 5v current out on Thu, 25 Jul 2019 12:22:15 GMT

klimbot — Thu, 25 Jul 2019 12:22:15 GMT

Awesome, thanks for sharing @wikistik!!
Will take this in to account when designing my hat.

Reply to Max 5v current out on Wed, 24 Jul 2019 15:41:27 GMT

wikistik — Wed, 24 Jul 2019 15:41:27 GMT

@klimbot Here are some results of practical testing:
Using the 5v header pin with the screen set to black and set to minimum brightness, flashing the led to make sure the cpu was still operating: I could draw about 400ma at the load (fluctuated between 388 and 402 using an incandescent light as a load). This was the case on both USB and battery power.
Using the 5v header pin with the screen displaying some text: the same load drew 500ma but it shut the screen down and the computer did recognize the unit until I replugged it in.

So let's say under 400ma with the screen "off" and considerably less with it on.