Propeller Power Draw

John Board

G'day,

According to the docs the power draw of a propeller chip is:

500 µA per MIPS (MIPS = Freq in MHz / 4 * Number of Active Cogs)

Now, my variables are:

Freq: 80_000_000
Number of Active Cogs: 8

So, just standard numbers, while utilizing all the cores. The only issue is, my numbers come up telling me that the chip would use at least 12,000 amps o.O

My maths was as follows:

MIPS = 80,000,000 / 4 * Number of Active Cogs
mA = MIPS (160,000,000) * 0.5
I = mA (80,000,000) / 1000
I = 80,000A

I also tried:

MIPS = 80,000,000 / (4 * Number of Active Cogs)
mA = MIPS (2,500,000) * 0.5
I = mA (1,250,000) / 1000
I = 1,250A

Now, 80k amps, or even 1.25 amps for that matter is completely insane - what am I doing wrong in my maths?

Thanks,

John

msrobots

John Board wrote: »

500 µA per MIPS (MIPS = Freq in MHz / 4 * Number of Active Cogs)

Now, my variables are:

Freq: 80 000_000

to much zeros?

Enjoy!

Mike

John Board

At the moment you could equal your avatar to my state.

msrobots

yes. those mental blocks ...

one of my friends used to say 'being able to read is a clear advantage'.

Enjoy!

Mike