TAS2563: Audio Amp. TI TAS2563 question

Hey Hopper,

The DS doesn't provide the two specs mentioned above at PVDD=5V. There's also no efficiency vs THDN plot in the DS. There is a THDN vs Freq plot that might be of your interest?

It seems you would like these two plot categories at PVDD=5V. 

There is a boost feature in the TAS2563. This feature improves loudness on the output terminal and has nothing to do with heat. What about the thermal performance is your concern regarding the boost or TAS2563 in general? it is not clear... are you concerned about the thermal performance at all? 

Regards,

Ore.

There is a boost feature in the TAS2563. This feature improves loudness on the output terminal and has nothing to do with heat. What about the thermal performance is your concern regarding the boost or TAS2563 in general? it is not clear... are you concerned about the thermal performance at all? 

Hopper-> Yes, we need to confirm that if PVDD=5V is no any issue .

There is a boost feature in the TAS2563. This feature improves loudness on the output terminal and has nothing to do with heat. What about the thermal performance is your concern regarding the boost or TAS2563 in general? it is not clear... are you concerned about the thermal performance at all? 

Hopper->Yes, We worry about the thermal issue, that's why we as you whether have any actual thermal test data of 6.1W or 5W.

Hey Hopper,

At PVDD=5V, the TAS2563 has no issue. PVDD range is from VBAT to a minimum of 13V depending on whether the YBG or QFN package is used. Checkout this description from the DS:

The DS doesn't provide any explicit thermal data performance characteristic plot  and the IC wouldn't present any issue at PVDD= 5V. Keep in mind for PVDD to be 5V, VBAT would have to be 5V or lower. The image above shows the VBAT range and how PVDD is dependent of VBAT's range. 

TAS2563 has good thermal performance overall. The I-V sense plot from page 25 to 26 show TAS2563 maintaining about 1% linearity when reading that data. No need to worry about thermal performance at PVDD=5V.

Regards,

Ore.

1.  At PVDD=5V, the TAS2563 has no issue. PVDD range is from VBAT to a minimum of 13V depending on whether the YBG or QFN package is used. Checkout this description from the DS:

Hopper-> According to yor reply,becaseu we want to use external boost to drive speaker that's why we need  your  help to provide the efficiency and THD+N of PVDD=5V at 2W,could you please confirm that？

2.  The DS doesn't provide any explicit thermal data performance characteristic plot  and the IC wouldn't present any issue at PVDD= 5V. Keep in mind for PVDD to be 5V, VBAT would have to be 5V or lower. The image above shows the VBAT range and how PVDD is dependent of VBAT's range. 

TAS2563 has good thermal performance overall. The I-V sense plot from page 25 to 26 show TAS2563 maintaining about 1% linearity when reading that data. No need to worry about thermal performance at PVDD=5V.

Hopper-> we ready to use external boost to drivre speaker, could you please help to confirm whether have any issue or not , if TI have actual test data for external boost PVDD=5V much better. 

Hey hopper, 

I can work internally to see what the results are for PVDD=5V efficiency is.

Expect a response from me regarding the performance you've requested.

Regards,

Ore.

Hey Hopper, 

Still working on providing this data, expect an update soon. 

Regards,

Ore.

Hey Hopper, 

Based off your current interests of using ext. PVDD at 5V, I would like to point out that if VBAT is equal to 5V, ext. PVDD mode isn't needed. To get you the support that you need, I would need more understanding on what TAS2563 is intended for in your your system and what your system is providing to support the device. 

• What is the VBAT for this device?
• Is PVDD eventually increasing from 5V? 
• What's the end equipment?

Regards,

Ore.

Hey Hopper,

I was able to generate power efficiency plots to show performance for PVDD=5V. 

VBAT=3.8V, PVDD=5V, IOVDD=1.8V, VDD=1.8V, RL=8Ohm.

I would like to mention that PVDD= 5V on 8Ohm load would generate a Vrms=3.535V and Pout=1.562W. These are to be considered values for measurement in ideal conditions. 

The DS doesn't have a plot for PVDD at 5V like mentioned but consider the performance to be between the plots for 2.5V and 8.4V. If you notice the trend of performance, efficiency increases with lower PVDD voltages. Assume the same for the 4Ohm load plot.

Here is a THDN vs Pout sweep using PVDD=5V. Based off the trend presented in the DS, this performance is within expectation of a curve between 2.5V and 8.4V as well. 

None of these tests are specified by the DS but if you follow the trend presented from lower to higher PVDD, these plots I presented follow the trend. 

This should be able to clarify there are no issues with ext. PVDD at 5V. Although, PVDD=5V could still be achieved in non-bypass mode where boost is enabled to provide the voltage needed on the output. 

Feel free to share your end equipment. I'll consider this thread resolved.

Regards,

Ore.

Thank you very much for your support.