External power source

A place to talk about all the Operating Systems, Software & Hardware
Post Reply
User avatar
gumby4231
Posts: 10
Joined: Fri Jul 10, 2020 2:00 pm

Fri Jul 10, 2020 2:12 pm

I'm looking to power my Lattepanda delta 432 from a 12V tractor battery. I have a buck converter which can be found here (https://www.amazon.ca/Yeeco-Converter-1 ... merReviews). I found a source that seemed to suggest you could power the panda from GPIO pins. Is this possible? I couldn't confirm this with official sources. The other option I am considering is to to use this USB-c step down converter found here (https://www.amazon.ca/HOMREE-Step-Down- ... ics&sr=1-2). I know the usb-c connector on the Panda is safer because of onboard regulators/fuses. My only concern is that this converter is only rated for 15W(5V 3A). Will that be sufficient? I am afraid of underpowering the device. I'm not sure how I would connect the battery via the 12V 4PIN power connector? Hopefully, my post is clear. Are there better options I have not considered? Any advice is appreciated.

User avatar
ccs_hello
Posts: 607
Joined: Sat Oct 13, 2018 9:16 pm

Fri Jul 10, 2020 5:40 pm

The subject is LattePanda Delta/Alpha, not LP classic (known as ver 1.)

Re: you could power the panda from GPIO pins...
NO. Not on Delta/Alpha

Re: 5V 3A 15W power source
Wrong spec.: voltage rating and power rating.

Once again, do not carry over LP classic spec to Delta/Alpha.

User avatar
gumby4231
Posts: 10
Joined: Fri Jul 10, 2020 2:00 pm

Mon Jul 13, 2020 2:13 pm

I'm not sure what you mean by carrying over LP classic spec to Delta/Alpha? 5V, 3A, 15W are the specs of the USB-C converter I am curious about. Are you saying that this source would be fine for the classic but not the Delta?
Additionally, for my project I may use a mirabox capture card[https://www.amazon.ca/dp/B07C6KCBYB/ref ... s9dHJ1ZQ==]. It will be connected/powered via USB 3.0 through the Panda. How does this change things concerning powering the Panda?
Thanks for the help

User avatar
ccs_hello
Posts: 607
Joined: Sat Oct 13, 2018 9:16 pm

Mon Jul 13, 2020 3:01 pm

Re: Are you saying that this source would be fine for the classic but not the Delta?
Absolutely they are different!

User avatar
gumby4231
Posts: 10
Joined: Fri Jul 10, 2020 2:00 pm

Mon Jul 13, 2020 7:13 pm

This source [http://docs.lattepanda.com/content/delt ... /powering/] states "Accepts Power Delivery compliant devices with 45W output (although 36 watts is adequate.)". Which would rule out my USB-C converter. Would anyone know an alternative? What can I do to power the device and protect the board from current spikes, etc?

User avatar
ccs_hello
Posts: 607
Joined: Sat Oct 13, 2018 9:16 pm

Mon Jul 13, 2020 8:28 pm

If using LP Alpha/Delta's USB-C port as the way to get external power, the LP Alpha/Delta board specifies
it needs a USB-C power supply that can deliver PD 15V 3A power profile.

On that please see this thread:
https://www.lattepanda.com/topic-f23t17728.html
A deeper analysis is in this thread https://www.lattepanda.com/topic-f23t17728.html

Post Reply