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TPA2012D2: Can I use it as a monaural speaker amplifier?

user6323968
Prodigy 50 points
Part Number: TPA2012D2

For common component purposes, we want to use stereo speaker amplifier ICs for mono speakers as well.
Is this possible?

If possible, can I just fix one side of the IC to GND?

  • 0
    TI__Guru* 84915 points

    Hi,

    Welcome to E2E and thank you for your interest in our products!

    Do you refer to single-ended speakers? The output speaker drivers are independent from each other OUTR+/OUTR- are for one independent speaker and OUTL+/OUTL- are used for another speaker. Both outputs are used in a differential configuration. Since it is a Class-D driver, both outputs are required to be connected to the speaker. So, it is not possible to connect one side of the IC to GND.

    Best regards,
    Luis Fernando Rodríguez S.

  • 0 in reply to Luis Fernando Rodriguez S.
    Prodigy 50 points

    Hi,

    Thank you for the reply.

    No, there is one differential speaker.

    For example, OUTL+/OUTL- is connected to the speaker, but OUTR+/OUTR- is no connected.

    And SDL is High, SDR is Low. 

    Is such a connection possible?

    If it is possible, what happens to the INR+/INR- connection?

  • 0 in reply to user6323968
    TI__Guru* 84915 points

    Hi, 

    Yes, this is the correct connection for a single channel mode.

    Regarding the INR+/INR- connection, these pins should be connected to 0.1uF capacitors to GND when they are not used.

    Best regards,
    Luis Fernando Rodríguez S.