We look forward to professional reply as soon as possible. Thank you!

Hi Luis,

Thank you very much!

Please help to double confirm. When TPA6205A1 is used with single-ended inputs and powered with 5V and differential output , What is the maximum output power ?

For example, in the following circuit, what is the maximum output power from TPA6205A1 to the 8-ohm speaker (@<1%THD) ?

Best regards!

Chuanfang Wang

Hi Luis,

Thank you very much!

Chuanfang Wang

Hi Luis,

I have used a DEMO board (TPA6205A1DRB EVM) to do experiments, and the test results are different from what you said. Please confirm clearly. If you also have this DEMO board(TPA6205A1DRB EVM), please test and confirm it. Thank you very much!

Hi,

Is your output voltage measurement related to the single-ended output or differential output? The single-ended output power will be always 4x times less than the differential output power.

Best regards,
Luis Fernando Rodríguez S.

hi Luis，

My question is simple. When IN- short circuit to GND, What is the maximum output power?  You told me, when IN- is grounded, the output is actually considered as single-ended, even if the speaker is connected as differential output.  But my test results show that's not the case. You need double confirmation.

Best regards

Chuanfang Wang

Hi, Chuanfang,

Thank you for the clarification and the tests you performed.

I searched for more information and you are alright. The maximum output power is actually dependent of the power supply. Even if you use a single-ended or differential input, the differential output will be always dependent of Gain x (IN+ minus IN-). However, Vo+ and Vo- are limited to the power supply level. So, if you are using a 5V power supply, you should expect a maximum output of 5V on each output. This will result in a maximum output of 1.25W, which coincides with the THD+N vs output power plot of the datasheet (figure 7).

Let me know if you have additional questions or comments.

Best regards,
Luis Fernando Rodríguez S.

Hi Luis,

The problem is clear. Thank you very much!  If TPA6205A1 has SPICE model, then I can figure out the problem by simulation.  That's why I've been asking you for the S model.

Best Regards

Chuanfang Wang