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TPA3116D2 LOWEST THD possible

Lakshana Nair
Prodigy 10 points


Hi,

I am unsure what decides the THD characteristics of TPA3116. If I want this chip to drive a 7-Ohm load what are the possible paramters I need to use to get the lowest THD +N ?

What should I do to get the lowest THD at 25- 30Watts maximum power?

  • 0
    TI__Mastermind 37045 points

    Hi Lakshana,

    EVM is a good starting point. Select inductors that does not saturate at peak current. Any loss of inductance of more than 3% up to the peak load current can increase THD. Use at least X7R or better capacitors (MKP/MKT).

    You may also use AM0, AM1, and AM2 to select higher PWM freq which can provide slightly better THD+N at the expense of higher idle current.

    reg,

    Paul Chen

    Applications Engineer