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TAS5611A: Looking for DAMP can achieve 150W with PVDD=24V

Expert 4660 points

Replies: 7

Views: 73

Part Number: TAS5611A

Hello expert,

I'm looking for D-amp that can achieve following requirement.
・Ch: 1ch BTL or 1ch PBTL
・PVDD: 24V
・Load: 2ohm or 4ohm
・Maximum output power: 150W peak(don't need to support 150W continuously)

Then, I think TAS5611A can achieve this requirement with lowest idle power consumption in TI D-amp portfolio.
If there is other appropriate device that have lower idle power consumption, would you tell me it?


Best regards,
Kazuki Kuramochi

  • Kuromochi-san,

    If the power spec is at 10% THD, it can be attained into a 2 ohm load.  If you operate the TAS5611A in PBTL into a 2 ohm load, you should be able to meet the customer needs.

    There is also the TPA3221 that can provide this power in PBTL mode into a 2 ohms load, that has low idle power.

    Regards,
    Gregg Scott
    Senior Application Engineer
    Mid Power Audio Amplifiers

  • In reply to Gregg Scott:

    Gregg-san,

    Thank you for your swift reply.

    I had checked TPA3221 but I though this cannot support 150W output from the following chart that is on datasheet.

    This looks like output power would be 137.5W @PVDD=24V case.

    Would you tell me why you think this device can satisfy customer requirement?
    Also, isn't there the device that have lower idle power consumption than TAS5611A if TPA3221 cannot meat required spec?


    Best regards,
    Kazuki Kuramochi

  • In reply to Kazuki Kuramochi:

    Hello Gregg-san,

    Sorry for bothering you but is there any update?
    I'm waiting your answer.


    Best regards,
    Kazuki Kuramcohi

  • In reply to Kazuki Kuramochi:

    Kuramochi-san,

    I am sorry for the late reply.  I misread the datasheet and read the 25Vdc reading instead of 24Vdc.  You will need to use the TPA5611A to meet the design needs.  The idle current is as stated.  We do not have lower idle current devices for this power level.

    Regards,
    Gregg Scott
    Senior Application Engineer
    Mid Power Audio Amplifiers

  • In reply to Gregg Scott:

    Scott-san,

    I understand that there isn't other device that can achieve 24V 150W with low idle current except TAS5611A.

    Also I have question regarding above output power chart.
    Is this continuous power or peak power?

    This is because, I only want to need achieving 150W as peak. Therefore, there is possibility to satisfy our expectation with TPA3221 if this chart is continuous power.

    Best regards,
    Kazuki Kuramochi

  • In reply to Kazuki Kuramochi:

    Kuramochi-san,

    First of all, there is no such thing as peak power. There is power in Watts only.   Sometimes, Power is discussed as Average Power in Watts that considers the power over time.  We should say 'short term power' versus 'continuous power'.  The short term power will still be limited by the voltage and current like the continuous power specifications. Therefore, the TPA3221 cannot meet your needs for 150W since it is limited to 137W by voltage that is able to be delivered to the load.

    Short term power is typically limited by thermal limitations.  The power can only be supplied for a short period of time before the over temperature protection takes place, or the parts heat up and limit the amount of power that can be delivered to the load. 

    Regards,
    Gregg Scott
    Senior Application Engineer
    Mid Power Audio Amplifiers

  • In reply to Gregg Scott:

    Gregg-san,

    I understand there isn't other device that can achieve their requirement.
    I'll suggest to use TAS5611A as lowest Iq device which can achieve 150W @PVDD=24V.

    Best regards,
    Kazuki Kuramochi