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Raspberry Pi is now manufacturing 70,000 Pi 5s per week, will surge to 90,000 in February (www.tomshardware.com)

submitted 10 months ago by [email protected] to c/[email protected]

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[–] [email protected] 6 points 9 months ago (2 children)

Pi5: 5V 5A USB-C??? There is now 45W USB-PD (@15V) that would be compatible with generic PSUs but they went proprietary with 5A@5V.

Was not even thinking about that. Implementing USB-PD is so easy these days. Basically just putting a chip there who handles the PD and then a step down(or whatever) converter which they already have anyway. (See ebay USB PD trigger for implementations)

That is so dump.

Talking about hardware flaws, i think they even fucked up the USB-C implementation on the PI 4. They put the resistor on the wrong pins or somthing. Dont remeber exactly.

[–] thundermoose 3 points 9 months ago (1 children)

I think operating at 5V input might be a technical constraint for them. Compatibility revisions for existing hardware are a lot more difficult if the input voltage is 9x higher. Addressing that isn't as easy as slapping a buck converter on the board.

Not saying requiring 5A was the right call, just that I can see reasons for not using USB-PD.

[–] [email protected] 3 points 9 months ago

We are not talking about 9 times higher. 3A at 9V would be enough.

I am currently looking in the Docs and it is really confusing. It states that the PI 5 has a PMIC on board but still saying it boots up only when the 5A is present... So not sure what is going on here.

And looking at the PD 3.1 standard it looks like 5V 5A is actually in the spec in the new Version...

Will have to get my hands on the new PD 3.1 spec.

[–] [email protected] 1 points 9 months ago

They used 1 resistor for CC1 and CC2. The fix and correct implementation was to use one resistor per CC-line (two in total).