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TAS5518 AD or BD

jerry booth
Prodigy 200 points
Other Parts Discussed in Thread: TAS5518, TAS5631, TAS5508C, TAS5518C, TAS5631B

 I am using a TAS5518 to provide PWM to the TAS5162. I don't see a setting on the TAS5518 to pick AD or BD.  I have a design update using a TAS5631 were you can chose AD or BD on the mode pins. I am using the reference design as a basis. 

Jerry

  • 0
    TI__Mastermind 33420 points

    Hello Jerry:

    TAS5518 only has AD mode.  I'd like to ask you using TAS5508C.  It's our latest one and is pin to pin compatible with TAS5518.

    Best regards,

    Tuan

  • 0 in reply to Tuan
    Prodigy 200 points

    Thank you Tuan, can you tell me is the TAS5508C a software drop in for the TAS5518. Can we use our existing TAS5518 commands on the TAS5508C?

    Also what are the advantages of the TAS5508C.

    The TI reference design for the TAS5631DKD (slou275a.pdf) which I have been advised is the latest TI Audio High power amp uses the TAS5518C. Is there any significance to that?

  • 0
    TI__Mastermind 33420 points

    Hi Jerry:

    First of ... you can continue with the same post (preferrably for continuity of the topic).

    Yes, you can use TAS5518 I2C register settings and port it over the TAS5508C provided that you don't use new features on TAS5508C.  If you do, just add the new I2C register settings for TAS5508C.  The main difference is on page 23 of TAS5508C data sheet.

    You can use TAS5508C with TAS5631B PHD pakage (recommended for better thermal dissipation).

    Best regards,

    Tuan

  • 0
    Prodigy 200 points

    Thank you Tuan, can you tell me is the TAS5508C a software drop in for the TAS5518. Can we use our existing TAS5518 commands on the TAS5508C?

    Also what are the advantages of the TAS5508C.

    The TI reference design for the TAS5631DKD (slou275a.pdf) which I have been advised is the latest TI Audio High power amp uses the TAS5518C. Is there any significance to that?

    If I reply to an answer to a question can I expect another answer. Or do I have to do a new Post which I am doing here?

  • 0 in reply to Tuan
    Prodigy 200 points

    We have seen the TAS5518 output DC. We have not been able to duplicate this except by using a spdif source that we can set a DC offset into and making all the bi quads pass through.

    Is there any setting we can inadvertently  set that would allow the TAS5518 output DC with out ?