Part Number: TAS2557
We want to use TAS2557 in a mobile phone to drive the speaker in handsfree mode.
Appreciate your quick response.
Our team will take a look at this and will provide an answer as soon as possible.
Best regards,Luis Fernando Rodríguez S.
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Actually TAS2557 firmware has been updated since data sheet was released and ASI2 is not needed to send echo-reference. This data is sent back through ASI1 SDOUT line. The firmware update is included in PPC3 so the part itself (hardware) is the same.
You can keep the unused ASI2 interface floating.
In addition, perhaps you can consider TAS2563 instead of TAS2557? TAS2563 is our latest smart amp release.
Best regards,-Ivan SalazarApplications Engineer - Low Power Audio & Actuators
In reply to Ivan Salazar:
Thanks for your valuable suggestions.
We have created the schematics for the TAS2563. Please review and provide your comments.
The speaker part is OWS-111535LA-8A
In reply to Naveen Kumar S1:
Attaching the schematics as it was not visible in the previous post.
Let me add some comments below:
Please consider taking a look at this app note if have not yet: https://www.ti.com/lit/an/slaa920/slaa920.pdf
Thanks for the quick repsonse.
Thanks for the applicaiton note, I would go through it and follow the reference schematics.
Just to get a confirmaiton, this schematics reviewed would suffice to achieve the following:
Please correct if I am wrong.
Ivan is out of the office today, he will be able to respond tomorrow morning.
Thank you for your comprehension.
In the schematic you attached VSNS_P and VSNS_N should be connected to OUT_P and OUT_N respectively.
As the TAS2563 Class D output does not require a filter output capacitors in this way are generally not recommended. The C*dV/dt current may trigger over current protection. If these capacitors are to limit EMI please consider using a ferrite bead in series with the output before the capacitor as Ivan recommended. This app note may help if you haven't seen it already. www.ti.com/.../slaa901.pdf
I believe that the 1uF@16V and 10uF@25V will be sufficient and Ivan will confirm this.
this schematic layout will be capable of excursion and temperature protection once the VSNS_x connections are corrected. With these protections the device will be able to maximize output power based on the excursion and coil temperature. Echo cancellation is supported, and the echo refernece data is sent back through SDOUT1.
In reply to Arthur Brown:
Thanks for the detailed and quick response.
I had corrected the VSNS nets soon after I figured out when comparing with the reference schematics in the application note. Thanks for pointing out and sharing the app note on the Filter design.
We had placed the shunt capacitor(DNI) at the output as per the reference schematics.We will make it DNI and replace the resistors with ferrite beads.
Thanks a lot for confirming on the features supported with this schematics.
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