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I have a battery, Li-po 3300mAh 22.2V 60C. Then, I have a system (main system, so to speak) which consist of STM32MP1 MPU (operating voltage [1.71, 3.6], typ. 3.3), STA8135GA GNSS IC (operating voltage [1.71, 3.6], typ. 3.3), and 12 motors (4 of them are 12V brushed DC motors). All these components on that system, works in certain amount (range) of voltage, right? The question is, how can I create a system - above the main system - to distribute power correctly from that battery to all the component on the main system?

Maybe I could name it the "power distribution system". How would that be?

I'm guessing it's all about DC-DC converters, voltage regulators thingy, am I right? Hence, I'm probably creating a "power supply unit" I should say. I'm still confused about the distribution workflow. Am I going to need just 1 DC-DC converter, then it would forward the desired amount of voltage into "terminals/hubs/ports"? Or am I going to need more than 1 of it?

Regarding motors, I would need an ESC, which will be designed with the MPU.

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  • \$\begingroup\$ What kind of "system" are you designing? A control panel, a single circuit board, a collection of circuit boards, something else? \$\endgroup\$ Commented Jul 10 at 19:15
  • \$\begingroup\$ A collection of circuit boards. GNSS IC I talked about is built with Cortex M7. Whereas the MPU is built with Cortex A7 and M4. So far, I should create 2 boards. @davide said I should use an ESC for grouped DC motors, which I will group them in 3, there I would need 3 ESCs. Finally, I should create 3 boards in total. \$\endgroup\$
    – keenan
    Commented Jul 12 at 6:49

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All these components on that system, works in certain amount (range) of voltage, right?

Right.

how can I create a system - above the main system - to distribute power correctly

  1. Do not power the motors directly. Power them through the appropriate motor driver (e.g., an ESC for a brushed DC motor)
  2. Group all the loads based on their desired operating voltages (e.g., 12 V, 5 V)
  3. Convert the battery voltage to those voltages with DC-DC converters
  4. Connect all the 12 V devices together in parallel and to the output of the 12 V DC-DC converter, all the 5 V devices to the output of the 5 V DC-DC converter, etc. All the devices share a common ground.

schematic

simulate this circuit – Schematic created using CircuitLab

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