TPA3100D2: Schematics Review

Ruixin Feng

Part Number: TPA3100D2
Other Parts Discussed in Thread: TLV320AIC3101

Hi team,

There are several questions and hope you could support.

1. could you pls help to review the TPA3100 and TLV320AIC3101 schematics in attachment?

2. And there are some unused pins, LINP, BSLN, LOUTN0,LOUTP0, LOUTP0,LOUTP1, BSLP, VCLAMP1 due to single speaker. How should customer design these pins? Should they be floating or grounded?

3. For Input signal of TPA3100, can it accept the output of TLV320AIC3101? Does customer need to add some amplifier between TLV320AIC3101 and TPA3100?

3364.Audio.pdf

Thanks!

Rayna

over 1 year ago

0 Yanming Gong over 1 year ago

TI__Mastermind 19460 points

Hi Rayna,

Please see TPA3100 review comments.

1. Unused audio input LINP should be connect to GND through 1uF capacitor, like LINN pin.

2. Unused channle output, BST pin can not be floating, since the channle is still swtiching. So BSLN and BSLP pin should be connected to OUPUT through 0.22uF capactiors.

3. For audion input, there should have RC filter between TLV320AIC3101 and TPA3100. Please double confirm with TLV320AIC3101 support team.

Regards,

Derek

0 Ruixin Feng over 1 year ago

TI__Intellectual 2105 points

Hi Derek,

for unused channel output pin, should them connect to OUTPUT also?

Thanks!

Rayna

0 Yanming Gong over 1 year ago in reply to Ruixin Feng

TI__Mastermind 19460 points

Hi Rayna,

Unused output pins can be floating.

0 Ruixin Feng over 1 year ago in reply to Yanming Gong

TI__Intellectual 2105 points

Hi Derek,

What's your suggestion for the value of RC between TLV320AIC3101 and TPA3100? Customer used 16kHz as corner frequency. Does it work? And I attached the updated schematics. Hope you could help to review again. Thanks a lot!

Audio update.pdf

Thanks a lot!

Rayna

0 Yanming Gong over 1 year ago in reply to Ruixin Feng

TI__Mastermind 19460 points

Hi Rayna,

The RC filter between TLV320AIC3101 and TPA3100 is related to TLV320AIC3101 modulation frequency. You can talk with TLV320AIC3101 team.

I checked the schematic, others is fine.

Regards,

Derek

Audio

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TPA3100D2: Schematics Review