TPA31xx differences

Aaron Spaete

Team,

My customer noted the following:

A difference that I noted in the TPA3121 and TPA3131 and TPA3111 is that the TPA3121 requires twice the decoupling capacitance than the other two designs (470uF vs 220uF). Any insight as to why? Are the 3131 and 3111 quieter by nature?

Can you help answer?

Thanks,

Aaron

over 9 years ago

0 Diego Melendez over 9 years ago

TI__Guru 57800 points

Hi, Aaron,

I asked my colleague to check your question, probably he will he able to get back to you early next week.

Best Regards,

-Diego Meléndez López
Audio Applications Engineer

0 Peter Cao over 9 years ago in reply to Diego Melendez

TI__Expert 5000 points

Hi, Aaron

TPA3110/18/31 is the latest close loop ClassD with better PSRR. So it will minimize the requirements for the power supply and save cost.

Audio

Audio forum

TPA31xx differences