ENG-CANSAT-PICO-POWERING

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Abstract

There are several way to power the power the Pico and your project.

The Pico run with 3.3V and can be powered with a voltage up to 5.5V. As the Pico voltage regulator is a Step-down/Step-up regulator (reduce/up-raise the source voltage) you can power it directly from batteries. Even when the battery voltage falls down under 3.3V the Pico will be able to run anyway.

Despite the simplicity to directly powering the Pico from a battery or a Lipo, there is also some interest to use specialized charging/discharging circuitery.

How-To Power Pico

The Pico can be powered:

  • Via the USB : so with 5V
  • Via the VSYS pin : with battery having max 5.5V
  • With a Battery Charger/discharge circuitery

The Pico can be easily shutdown by placing the 3V3_EN pin to the ground.

This will deactivate the Pico 3.3V DC/DC regulator and spare the battery power.

Pico and PowerBoost

ENG-CANSAT-PICO-POWERING

The Adafruit PowerBoost 500 is a breakout board able:

  • to discharge a Lipo battery and generates 5V output
  • to charge the Lipo battery when connected to an external 5V power
  • to do the both operations at the same time.



Written by Meurisse D. for MCHobby


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