TAS2564: Who to select Audio Jack, 3.5mm channel for PPC3-EVM-MB

Kevin Huang8

Part Number: TAS2564

Hi e2e team,

R&D used the USB audio input is OK, but analog input is fail, J4 Pin15&16 is short. please help provide J21 input user guide,thanks!

over 5 years ago

0 Luis Fernando Rodriguez S. over 5 years ago

TI__Guru* 84915 points

Hi, Kevin,

Our team will take a look at this thread and will answer as soon as possible.

Best regards,
Luis Fernando Rodríguez S.

0 Jin Gao over 5 years ago

TI__Intellectual 865 points

Hello Kevin,

Thank you for your interest in TAS2564 EVM. Based on what I gathered from Senior Apps, the analog inputs path in not enabled for our TAS256x EVMs in PPC3. Unfortunately, this option is currently not available. One way around it if you need to test for analog input is to implement an ADC and feed into the I2S externally.

Regards,

Jin Gao

0 Kevin Huang8 over 5 years ago in reply to Jin Gao

Genius 3955 points

Hi Team,

R&D testing TAS2564 EVM output power is 5W, cannot meet datasheet marking 7W, please help provide GUI or PPC3-EVM need modify root cause,thanks!

BTW,TAS2564 measured is 10V

0 Jin Gao over 5 years ago in reply to Kevin Huang8

TI__Intellectual 865 points

Hello Kevin,

Can you resend the images through images attachment? Also the PPC3 setup you currently have?

Regards,

Jin Gao

0 Kevin Huang8 over 5 years ago in reply to Jin Gao

Genius 3955 points

Hi Team,

FYR.

0 Ivan Salazar over 5 years ago in reply to Kevin Huang8

TI__Guru** 104555 points

Hi Kevin,

This is related to VBAT stability the boost voltage is drooping and thus increasing distortion.

I'm debugging this on the EVM and will let you know how you can modify the hardware and/or device configuration to get the values from data sheet spec.

Best regards,
-Ivan Salazar
Applications Engineer - Low Power Audio & Actuators

0 Ivan Salazar over 5 years ago in reply to Ivan Salazar

TI__Guru** 104555 points

Hi Kevin,

Just an update, we'll be continue debugging this week, I'll give further comments by the end of the week.

Best regards,
-Ivan Salazar
Applications Engineer - Low Power Audio & Actuators

0 Kevin Huang8 over 5 years ago in reply to Ivan Salazar

Genius 3955 points

Hi Team,

Any response? thanks!

0 Ivan Salazar over 5 years ago in reply to Kevin Huang8

TI__Guru** 104555 points

Hi Kevin,

The necessary change in the EVM is to ensure a star connection to VBAT from the boost inductor and VBAT plane/polygon to the device.

Attached you can find some slides with test results. Also following up through email chain.

TAS2564_PerformanceValidation_3.4V.pdf

Best regards,
-Ivan Salazar
Applications Engineer - Low Power Audio & Actuators

0 Kevin Huang8 over 5 years ago in reply to Ivan Salazar

Genius 3955 points

Hi Ivan,

Would you help provide PPC-3 GUI Boost condition for 7W? as now I just measured Po is 2W.

(1)Audio is USB in, and 1KHz// Sinwave// 0dB

(2)Speaker:8phm

(3)TAS2564 EVB Vin: 3.5V

(4)PPC3 EVB Vin: 5V

0 Ivan Salazar over 5 years ago in reply to Kevin Huang8

TI__Guru** 104555 points

Hi Kevin,

Since you're using USB audio source, have you make sure the audio setting for the EVM connection is set to 100%?

From the plot it does not seem to be a boost or supply limitation, but low input volume.
If you change the amplifier level, do you see the output amplitude changing as well?

Best regards,
-Ivan Salazar
Applications Engineer - Low Power Audio & Actuators

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TAS2564: Who to select Audio Jack, 3.5mm channel for PPC3-EVM-MB