Sourcing 0.5A from VBAT pin

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jlecomte
 
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Joined: Mon Mar 20, 2023 11:42 am

Sourcing 0.5A from VBAT pin

Post by jlecomte »

Hi,

I am using a LiPo to power my Adafruit Feather nRF52840 Express. I also need the LiPo to power a LED strip via a voltage regulator. My LED strip requires as much as 500mA. My question is the following: Can I source 500mA from the "Bat" pin? Or is that pin able to source only a small amount of current like the GPIO pins? (~40mA, or something like that, I don't know the exact value...) The documentation is unclear on that point: "LIPO Input (Bat): This is the voltage supply off the optional LIPO cell that can be connected via the JST PH connector. It is nominally ~3.5-4.2V."

Thanks!
- Julien

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mikeysklar
 
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Re: Sourcing 0.5A from VBAT pin

Post by mikeysklar »

The BAT pin is a good choice for high current.

Only the 3V pin is really limited because of a voltage regulator which is typically 500mA.

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