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Olimex Support Forum

OLinuXino Android / Linux boards and System On Modules => A20 => Topic started by: ahguahgu on August 18, 2016, 07:42:48 PM

Title: power consumption of A20?
Post by: ahguahgu on August 18, 2016, 07:42:48 PM
What is the power consumption you have seen on the board?
Title: Re: power consumption of A20?
Post by: LubOlimex on August 30, 2016, 01:31:47 PM
The A20 chip consumes a lot. Yet, which A20 board do you have in mind exactly? Also how do you power it (which connector and what source do you use)?

Best regards,
Lub/OLIMEX
Title: Re: power consumption of A20?
Post by: JimT on February 10, 2021, 10:18:26 AM
My Lime2 consumes about 2.7 Watt in Idle. I think that is a little bit too much. I am running Debian Buster Stable (minimal).

How can I lower the power consumption?
Title: Re: power consumption of A20?
Post by: LubOlimex on February 10, 2021, 10:31:35 AM
Seems typical consumption.  You can't really reduce it without reducing performance or disable peripherals.

Allwinner A20 is not a chip known for it's low power consumption. To lower it lower the frequency of the main chip, reduce the speed of the RAM memory, start disabling peripherals that you don't need (user LEDs for example), etc.
Title: Re: power consumption of A20?
Post by: JimT on May 09, 2021, 12:10:32 PM
By reducing the speed of the ethernet-adapter to 10 Mbits I could reduce power consumption to 2 Watt in Idle.

How can I disable HDMI and so on?

Is there a tutorial? (something like devicetree-overlay modification in RaspiPi)
Title: Re: power consumption of A20?
Post by: JohnS on May 11, 2021, 06:29:20 PM
You're basically asking:
1. what can the chip do (read the datasheets)
2. what can Linux do (try linux-sunxi ML etc)

John
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