TPA3110D2 -Q1 additional graph

Takao Yamamoto

Genius 4135 points

Other Parts Discussed in Thread: TPA3110D2-Q1

Dear all,

I think to use TPA3110D2-Q1 for 16Ω and 4Ω speakers.

(Gain=20dB, Vcc=8.5V, Output=5W or less)

I have some questions to use this device, please teach me your answers.

Question 1： I want graph 「EFFICIENCY vs OUTPUT POWER(BTL)」 for 16Ω.

I would like to know variability when temperature change.

It is better that the condition is Vcc=8.5V.

Question 2： I want graph 「EFFICIENCY vs OUTPUT POWER(BTL)」 for 4Ω.

I would like to know variability when temperature change.

It is better that the condition is Vcc=8.5V.

Question 3： I would like to know the way to figure the total amount of current that this device use.

Please teach me the way to figure TYP and MAX.

Question 4： I want graph 「SUPPLY CURRENT vs TOTAL OUTPUT POWER(BTL)」 for 16Ω.

I would like to know variability when temperature change.

It is better that the condition is Vcc=8.5V.

Question 5： I want graph 「SUPPLY CURRENT vs TOTAL OUTPUT POWER(BTL)」 for 4Ω.

I would like to know variability when temperature change.

It is better that the condition is Vcc=8.5V.

Best regards,

over 8 years ago

0 Karl Wallinger over 8 years ago

TI__Genius 16030 points

Hello Yamamoto-san,

The appropriate application engineer has been notified, and will respond accordingly.

Regards,
Karl

0 Clancy Soehren over 8 years ago

TI__Mastermind 23810 points

Takao,

I assume you've already looked at the characteristic curves available in the datasheet, correct? These aren't exactly what you're asking for of course. With so many different combinations we have to choose a few of the more common use cases when generating these curves.

I'll do some digging around to see if we have graphs for any of your questions. How soon do you need these results? Are any of these more time critical than others?

Do you have an EVM? Have you tried to take any of these measurements using the EVM? Do you need help understanding what the set-up is for these measurements or what they mean?

Thanks,

-Clancy

0 Takao Yamamoto over 8 years ago in reply to Clancy Soehren

Genius 4135 points

Dear Clancy,

Thank you for your reply.

I need these results by the end of this week.

I do not have an EVM.

Best regards,

0 Takao Yamamoto over 8 years ago in reply to Takao Yamamoto

Genius 4135 points

Dear Clancy,

How is your preparation going?

Best regards,

0 Clancy Soehren over 8 years ago in reply to Takao Yamamoto

TI__Mastermind 23810 points

Takao,

Efficiency, output power, and supply current are all related:

P_IN * efficiency = P_OUT.

I_IN = P_OUT/(V_IN * efficiency)

So I will take one set of data each for VCC = 8.5V with loads of 4 ohms and 16 ohms. Do you have a request for what LC filter should be used for these measurements?

Thanks,

-Clancy

0 Clancy Soehren over 8 years ago in reply to Clancy Soehren

TI__Mastermind 23810 points

Takao,

Also, do you have a request for what temperatures to test this at?

Thanks,

-Clancy

0 Takao Yamamoto over 8 years ago in reply to Clancy Soehren

Genius 4135 points

Dear Clancy,

Thank you for your test.

And I am sorry for my belated reply.

>Do you have a request for what LC filter should be used for these measurements?

Please use the LC filter recommended at data sheet.

In case with 4Ω, LC filter is recommended at Figure 42 at data sheet.

But, in case with 16Ω, LC filter is not recommended. So please use your recommended filter.

>Also, do you have a request for what temperatures to test this at?

Please test at -40℃, 25℃, and 125℃.

Best regards,

0 Takao Yamamoto over 8 years ago in reply to Takao Yamamoto

Genius 4135 points

Dear Clancy,

How is your preparation going?

Best regards,

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TPA3110D2 -Q1 additional graph