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TPA3118D2: Need to configure FUALT,MUTE,SD,PLIMIT pins of TPA3118D2.

Part Number: TPA3118D2

Hi Team,

Our hardware team has design one amplifier followed by audio codec.

I have to configure following pins in Codec driver in kernel Android11 code base.

I Don't have any idea what kind of signal needed on these pins.

I can toggle these pins through software.

Could you please guide me to configure these pins.

Just give me idea about initial logic level/voltage should I provide on these pins. i.e 0 or 1.

PLIMIT >> Signal details?

MUTE PIN >> Active low/HIGH > LOGIC 1????

SD pin >> Active low/HIGH > LOGIC 1????

FUALT >> Active low/HIGH > LOGIC 1???? 

I have datasheet . But not able to understand understand signal details properly.

check sch of amplifier:



  • Hi Divyesh,

    You can see 6.3 Recommended Operating Conditions, the high means voltage on the pin should be >VIH, low means <VOL.

    PLIMIT is the feature which is used to limit output peak. The datasheet has detail information.



  • Hi Gong,

    I know the high means voltage on the pin should be >VIH, low means <VOL.

    I wanted to ask about. What initial signal should I provide to these inputs signal.

    Once device is boot up, after that what signal should I keep initially on these pins(HIGH/LOW).

    limit output peak>> How to control it through code? share example for same?


  • Hi,

    TI recommend initial configuration is: Power up, When Enable Amp (SDZ High)-------- Mute Amplifier first, Then SDZ High, Delay >40ms then Unmute Amplifier.

    The 7.3.4 PLIMIT Operation in datasheet has example and detail description for PLIMIT feature.