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Review Schematics about LM4875

Inho Jeon
Expert 1452 points
Other Parts Discussed in Thread: LM4875

Hello, all !

I attached schematic file and datasheet about audio codec and speaker of attached schematic.

Please, Review attached schematic. 

And, I have a question; I want to not HP_SENSE of LM4875. So, How can I to do? Just not design like attached schematics file?

Please, Inform me thst question.

Best Regards,

Inho Jeon

AUDIO.pdf

spk.pdf

8345.CS42888-CQZ(Audio_Codec).pdf

  • 0
    TI__Mastermind 20085 points
    Hello Inho

    The schematic seems fine and the speaker will bear the device output power. Regarding HP_SENSE isn't needed to connect it when a headphone isn't used on the device because HP_SENSE establishes the modes (bridged speaker mode or headphone mode) in your case you just use a speaker then HP_SENSE must be "0 V" to place the device within the bridged speaker mode.

    Please let me know your opinion or if you have more questions.

    Best regards
    José Luis Figueroa
    Audio Applications Engineer | A-Team
  • 0 in reply to José Luis
    Expert 1452 points
    Hi, José!
    Thank you for your reply.

    You mean if HP sense is not use, then HP sense just connect GND, is that right?

    Best Regards,
    Inho Jeon
  • 0 in reply to Inho Jeon
    TI__Mastermind 20085 points
    Hi, Inho

    That's correct, you just need to connect the HP sense to GND.

    Best regards
    José Luis Figueroa
    Audio Applications Engineer | A-Team