TDA3XEVM: TDA3 Power Reduction Methods

Hello Kim,

Can you please share the sdk version that you are using?

Also what temperature is touched when you see over heating? 

Best regards,

Keerthy 

Hi

Using Custom Board Version 03.08

Even if nothing works, it can be checked at about 95

Regards

Kim

Kim,

For an idle SoC the temperature is high. How are you reading the temperature? Is it using the thermal camera or some external equipment?

Best Regards,

Keerthy 

Hi

I printed out the temp sensor values ​​inside the chip.

They are as follows:

PU1-0] 973.867992 s: Voltage Rail || Curr Temp Min - Max
[IPU1-0] 973.868083 s: ---------------------------------------------------------
[IPU1-0] 973.868144 s: PMHAL_PRCM_VD_CORE || [94.400 , 94.800]

Regards,

Kim

Hello Kim,

There are no software based cooling solutions on vsdk.

Best Regards,

Keerthy 

Hi

In that case, are there any points to check other than S/W?

Regards

Kim

Hello Kim,

I am looping in hardware experts.

- Keerthy

Have you verified you have correct voltages applied for each power rail?  Using a higher voltage can cause excessive heat.

If CPU(s) are set to a frequency and executing - they are clocking (using power) even if not actively being used by an application.

I have referenced the above data sheet document.

The opp currently in use is high.

I read the 0x4A00 25E8 (DSPEVE)register and it is confirmed as 1130mv.

and 0x4A00 25F4 (CORE)register as 1040mv

It seems to satisfy the conditions in the table.

Is this correct?

If setting for OPP High, then expectation should be the device will generate more heat (as you are setting a higher voltage and running at a higher processor frequency).  I see there is a thermal model available on Ti.com for TDA3 - have you done any thermal simulations to determine if you are within expected thermal regions or exceeding those expectations?

Where can I find the link to the thermal model?

On Ti.com on Processor page under Design Tools/Simulation:  Link

Specific Link to Model:  Link