Due to the U.S. Thanksgiving holiday, please expect delayed responses during the week of 11/22.

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TAS5414C-Q1: Recommendations for 10uH inductor

Part Number: TAS5414C-Q1
Other Parts Discussed in Thread: TAS5414C

Hello,

My customer is inquiring about recommended power inductors for the TAS5414C.   They are currently using a Sagami DBL8087H-100M-R , 10uH dual core SMD 8x8mm, but would like to know what various inductors we recommend, especially if they have already been tested and are known good choices.   In particular they are curious if any Sumida inductors have been tested with the TAS5414C.

I did see that the EVM lists Coilcraft SER1360H-103L as the 10uH inductor used on the board, but wanted to check if there are any other recommendations / tested inductors (particularly any from Sumida).

Thanks,

Ben

  • Hi Ben,

    I am sorry that I think we do not have the data of other inductor various for audio performance. 

    I suggest customer can replace the inductor on EVM board to check.

    Regards,

    Derek

  • Ben,

    The Coilcraft inductor is used at the power supply filter inductor on the EVM.  The inductor used in the LC filter for the amplifier is a Murata HEAW 10uH.  I believe this inductor is Not Recommended for New Designs (NRND).  There are many other inductors today that can be used.  The customer needs to evaluate these on their own.

  • Hi Gregg, Derek,

    Thank you for the additional details.   Do we have any guidance (key specs) for proper output filter inductor selection?   I was unable to find this information in the datasheet, but I could have just missed it.

    Thanks,

    Ben

  • The basic need is the inductance value, the inductance value at the maximum used current. The minimum inductance should not be below 5uH.  The DCR should be less than 50mOhms.  The lower the DCR the more power delivered to the speakers.  When using ferrite, the saturation current vs temperature should be known.  The saturation current is lower as the temperature rises.