SK-AM62: power consumption with different power supplies

j j

Part Number: SK-AM62

powering the SK-am62 from a computer's usb port causes the SK-AM62 to boot correctly, but consumes only a very small amount of power(~1.1w at idle).

powering the SK-am62 from a dedicated USB port causes the SK-AM62 to boot correctly, but consumes much more power(2.9w at idle).

I understand the starter guide requires a 3A power supply, so the first configuration is incorrect, but am wondering:

1. What accounts for the change in power consumption?
there do not seem to be any cpu scaling behaviors exposed in linux' /sys/devices/system/cpu/cpufreq/, nor are there clock changes reported in /proc/cpuinfo.

2. is there a method for the SK-AM62 to report if the power supply is adequate?

over 2 years ago

0 Kallikuppa Sreenivasa over 2 years ago

TI__Guru**** 189029 points

Hello JJ,

Thank you for the query.

Let me review internally.

powering the SK-am62 from a dedicated USB port causes the SK-AM62 to boot correctly, but consumes much more power(2.9w at idle).

I assume this is external - please confirm the supply.

Regards,

Sreenivasa

0 j j over 2 years ago in reply to Kallikuppa Sreenivasa

Prodigy 165 points

i'm not sure i understand the question, but I think you are asking me to clarify what Imean above when i said 'dedicated USB port'. I mean a power supply such as this : https://www.amazon.com/UCTRONICS-Raspberry-Supply-Charger-Adapter/dp/B08C9VYLLK/

0 Kallikuppa Sreenivasa over 2 years ago in reply to j j

TI__Guru**** 189029 points

Hello JJ,

Thank you for the reply and yes i was checking on the power supply.

Let me check internally and update you.

Regards,

Sreenivasa

0 Kallikuppa Sreenivasa over 2 years ago in reply to Kallikuppa Sreenivasa

TI__Guru**** 189029 points

Hello JJ,

Can you please help us understand how yo are measuring the SK-am62 power ?

Regards,

Sreenivasa

0 j j over 2 years ago in reply to Kallikuppa Sreenivasa

Prodigy 165 points

using this: https://www.amazon.com/Digital-Multimeter-Detector-24-0000V-SCP%E3%80%81AFC%E3%80%81CVOOC/dp/B08N6YMH23

in this case:
powering the SK-am62 from a computer's usb port causes the SK-AM62 to boot correctly, but consumes only a very small amount of power(~1.1w at idle).

computer USB-A port->power meter->USB-A to USB-C cable -> SK-AM62

in this case:
powering the SK-am62 from a dedicated USB port causes the SK-AM62 to boot correctly, but consumes much more power(2.9w at idle).

110v to 5v/3a power supply USB-A-> power meter->USB-A to USB-C cable ->SK-AM62

0 Kallikuppa Sreenivasa over 2 years ago in reply to j j

TI__Guru**** 189029 points

Hello J.J,

Thank you for the input.

Let me check internally on this.

Do you see any change in the multimeter behaviour between the 2 supplies connection ?

Regards,

Sreenivasa

0 j j over 2 years ago in reply to Kallikuppa Sreenivasa

Prodigy 165 points

I don't know what you mean by 'multi meter behavior'

0 Kallikuppa Sreenivasa over 2 years ago in reply to j j

TI__Guru**** 189029 points

Hello J.J

using this: https://www.amazon.com/Digital-Multimeter-Detector-24-0000V-SCP%E3%80%81AFC%E3%80%81CVOOC/dp/B08N6YMH23

In these 2 configuration, from the start of connection to the measurement, can you please check the multimeter measurement pattern and do you see any difference in behaviour

computer USB-A port->power meter->USB-A to USB-C cable -> SK-AM62

110v to 5v/3a power supply USB-A-> power meter->USB-A to USB-C cable ->SK-AM62

Do you have any other EVM where you have done similar tests.

Regards,

Sreenivasa

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SK-AM62: power consumption with different power supplies