LattePanda ALPHA DC Power insights

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ccs_hello
Posts: 438
Joined: Sat Oct 13, 2018 9:16 pm

Fri Feb 08, 2019 7:53 pm

Those individual 1s cell with integrated BMS can be useful, so long as
(1) if all those cells are equally fresh and
(2) have been well designed thus can maintain the same charge/discharge behavior over their life time
Ideal case will work that way.

The "balancer" part of circuit (the above 1s unit does not have) is used to ensure during charging, one cell will not be over-charged while the other one insufficiently charged. The goal is to get both charged to be equilibrium (no matter if one "much more degraded" cell can't take the charge as the other "better" one can.)

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john_mckale
Posts: 6
Joined: Fri Jan 25, 2019 12:12 am

Sat Mar 09, 2019 6:54 pm

When using the DC 4 pin slot how do you have it set up for a stable system?

Is there an advantage using 4 pins, 2+ and 2- to supply power vs using 2 of the pins, 1+ and 1-?

When using the 4 pins is the power divided coming in on the 2+ connections? (6v on each pin) or is it for redundancy?

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ccs_hello
Posts: 438
Joined: Sat Oct 13, 2018 9:16 pm

Sat Mar 09, 2019 10:48 pm

Need to use all 4 pins. They are in + + - - arrangement.
Reason: LP Alpha needs to have sufficient power provided to be operational reliably.
The PH2.0 connector used is rated (if I recall it right) for 1.25A (or 1.5A sorry I really don't want to go back to my document collection) per pin. Using 2 pins together can provided (up to) 3A power feed.

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Knightshadow1371
Posts: 28
Joined: Mon Sep 03, 2018 7:24 pm

Wed Apr 24, 2019 3:35 pm

ccs_hello,

What DIY setup do you use to Power your LPA using the DC power pins? I really need to free up my USB-C for my display, and I have not found any USB-C hub that can properly handle power pass through on one USB-C port and display data through another USB-C. One I did find that said would work (I even messaged the company's tech department, who said it would work with no problem) actually didn't for some reason, so I had to send it back.

What do you use for your DC power supply?

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DVS_Dee
Posts: 10
Joined: Mon Apr 25, 2016 8:14 pm

Wed Apr 24, 2019 9:35 pm

Knightshadow1371 wrote:
Wed Apr 24, 2019 3:35 pm
ccs_hello,

What DIY setup do you use to Power your LPA using the DC power pins? I really need to free up my USB-C for my display, and I have not found any USB-C hub that can properly handle power pass through on one USB-C port and display data through another USB-C. One I did find that said would work (I even messaged the company's tech department, who said it would work with no problem) actually didn't for some reason, so I had to send it back.

What do you use for your DC power supply?
This:

https://www.youtube.com/watch?v=Cd2IIhS ... e=youtu.be

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ccs_hello
Posts: 438
Joined: Sat Oct 13, 2018 9:16 pm

Sun Sep 22, 2019 3:00 pm

Just like to mention some "known to be better" (at least better than designed for LED lamps) power adapters for the DC_in 4-pin power feed.
- Kensington k38047 (set to "12V mode"), 12V 3A, about $15 or less
- OEM HP F1044B (12V 3.3A) less than $15
- If you'd like to try 15V power supply, Toshiba PA2444U is cheap (less than $10 and it's 15V 4A.)

<-- note I only picked the power adapter designed for laptop and OEM/genuine preferred

These do not include the PH2.0 4-pin plug. DIY is needed.

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Lutz
Posts: 214
Joined: Mon Apr 18, 2016 4:30 am
Location: Germany, NRW

Mon Sep 23, 2019 11:58 am

ccs_hello wrote:
Sun Sep 22, 2019 3:00 pm
Just like to mention some "known to be better" (at least better than designed for LED lamps) power adapters for the DC_in 4-pin power feed.
- Kensington k38047 (set to "12V mode"), 12V 3A, about $15 or less
- OEM HP F1044B (12V 3.3A) less than $15
- If you'd like to try 15V power supply, Toshiba PA2444U is cheap (less than $10 and it's 15V 4A.)

<-- note I only picked the power adapter designed for laptop and OEM/genuine preferred

These do not include the PH2.0 4-pin plug. DIY is needed.
In our company we use Mean Well power supplies exclusively.
At my home I use a power supply of type SGA60E12-P1J with 12V 5A for the Alpha.
A SGA40E12-P1J would be enough too, but we didn't have it in stock :)

... and yes, also DIY pin plug is needed.

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ender
Posts: 92
Joined: Wed Dec 27, 2017 3:55 pm

Mon Oct 14, 2019 1:58 pm

hello , Is there such an additional card in "lattepanda alpha"?

https://www.youtube.com/watch?v=tDFOJALmbSI

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ccs_hello
Posts: 438
Joined: Sat Oct 13, 2018 9:16 pm

Tue Oct 15, 2019 12:22 am

For LP Alpha's external power feeder (e.g., as a poorman's UPS),
there is a much simple solution:

Use a suitable battery pack, to be connected to LPA's 10-pin battery connector. <-- just like a laptop battery type of behavior

See this thread and the post I had hinted:
https://www.lattepanda.com/topic-p26751.html#p26751

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