Hi all,
My custoerm wants to know : What’s PVDD voltage of TPA3244 could be for THD+N<0.1% (Frequency: 100~16KHz) with 50Watt ouputt power (25Watt*2)? Will with any specific condition ?
Best regards,
Albert Lee.
Hi Albert,
As I understand your question, you are trying to find the minimum PVDD that can support your application. Your application requirements are:
Please let me know if I am incorrect in my understanding.
We don't have a typical characteristic curve of Output Power vs Supply Voltage for 0.1% THD , but we do have one for 1% (see Figure 5 on page 10 of the TPA3244 datasheet). We will use this as a first pass.
As you can see from the lines I drew, for a 4 ohm load this comes out to about 16V. For an 8 ohm load, this is about 22V.
But 0.1% THD+N is a tougher requirement to meet, so we will have to increase the voltage, but by how much?
I looked at some bench measurements. Here are the results I found on from the bench:
Supply voltage required to get 0.1% THD+N for 25 Watts
| Load | Supply Voltage |
| 4 | 17 |
| 6 | 20 |
| 8 | 23 |
Best Regards,
Dan
