LM49251: Simultaneous output

David Park

Expert 6060 points

Part Number: LM49251
Other Parts Discussed in Thread: TPA2051D3

Hi,

Through register setting of output mode selection, is below operation available?

Mix of mono input and stereo input and simultaneously out to SPK out and HP out like below.

Mono input + ST input => SPK out(Mono+ST) + HP out(Mono+ST)

In the table 5, this type of setting is not available.

But if any setting can make above operation available, please let me know.

Thanks.

over 4 years ago

0 Luis Fernando Rodriguez S. over 4 years ago

TI__Guru* 84915 points

Hi, David,

Unfortunately, both inputs mono and stereo cannot be mixed in this device. I can suggest an alternative device if you agree. Could you provide the device requirements that you need?

Best regards,
Luis Fernando Rodríguez S.

0 David Park over 4 years ago in reply to Luis Fernando Rodriguez S.

TI__Expert 6060 points

Hi Luis,

Current solution is NCP2704FCCT1G from onsemi.

requirements are as below.

- 2 differential inputs

- 2 outputs for Class D diff loud SPK and headphone(stereo L, R)

- I2C control

- independent control of audio gain for each input

- Available below setting for shutdown or switching control

- Input 1 -> SPK out, HP out

- Input 1, Input 2 -> SPK out

- Input 1 -> SPK out + HP out and input 2 -> SPK out

Thanks.

0 Luis Fernando Rodriguez S. over 4 years ago in reply to David Park

TI__Guru* 84915 points

Hi, David,

I would recommend to take a look at the TPA2051d3, it has the same characteristics that you mentioned in your previous response:

http://www.ti.com/lit/ds/symlink/tpa2051d3.pdf

Please let me know if you have additional questions or comments.

Best regards,
Luis Fernando Rodríguez S.

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LM49251: Simultaneous output