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eugene128 , 12-13-2019, 05:17 AM

Hello.

We noted that in accordination with datasheet TinyRex Solo requires 3W on peak (without GPU).

However in PCB it requires 3 different power sources (transformed from 5V5 level): 5V 1.5A + 3V3 2A + 2V5 0,35A

If we understand right it requires 5V5 4A = 22W (from baseboard to module).

For what other 19W ?
Is it uses to supply GPU and USB devices?

We need to get some clarification for this.


Thanks!

Lakshmi , 12-13-2019, 07:06 AM

Hi,
When you say 5V 1.5A,3V2A etc Are you referring the Switching/LDO Regulator's specification? If possible add an image where it's mentioned so.

Thanks.

eugene128 , 12-13-2019, 07:29 AM

Hello, Lakshmi.
No, we are referring the TinyRex's scheme. We are looking at the labels "DESIGN NOTE" (at the top-right corner) of each power connection.

Sure, I've attached TinyRex's requirements (pdf file)

Lakshmi , 12-13-2019, 10:07 AM

Hey,
Please go through this:

It's said that power consumption for single thread cpu and 1 memory.
That doesn't mean that design has to be min. power consumption. You need to look at part/IC's datasheet n should calculate the current consumption

eugene128 , 12-16-2019, 06:29 AM

It's clear
Thank you for advice!

robertferanec , 12-17-2019, 12:06 AM

Do not forget, power supply has to be able to deliver the peak currents which are usually much higher than continuous currents. So I would not just add the numbers, that is not an accurate calculation.

This may help you: https://www.imx6rex.com/2015/07/imx6...r-consumption/