TPA6211A1-Q1: TPA6211-Q1 Single-ended input application

Sam Kim

Part Number: TPA6211A1-Q1
Other Parts Discussed in Thread: TPA6211-Q1

Hello,

In TPA6211-Q1 single-ended application schematic in datasheet, inverting input is used as audio input. Is their any difference in using non-inverting input for audio input?

Below is customer's circuit and they were seeing a large oscillation voltage on input pin(IN+). After removing low pass filter capacitor(C181, C182), they could get clean sine wave. Do these capacitor cause this problem?

Regards,

Sam

over 8 years ago

0 José Luis over 8 years ago

TI__Mastermind 20085 points

Hi Sam Kim,

The only difference is that the input signals are out of phase 180 degrees to each other.
They are adding a filter for each input, but they are using single-ended input. They should just use a filter on the audio input (IN+).
Please let me know if this helps you.

Best Regards
José Luis Figueroa
Audio Applications Engineer

0 Sam Kim over 8 years ago in reply to José Luis

TI__Prodigy 510 points

Thanks, José Luis.
BTW, can you please elaborate on this oscillation due to filter capacitor on unused input pin?

Regards,
Sam

0 José Luis over 8 years ago in reply to Sam Kim

TI__Mastermind 20085 points

Sam Kim,

I don't understand your question very well. Could you give me more information?

Best Regards
José Luis Figueroa
Audio Applications Engineer

Audio

Audio forum

TPA6211A1-Q1: TPA6211-Q1 Single-ended input application