Hello.
I understand that the voltage of SPKVDD is greater than or equal to AVDD, but what difference does it make in the operation of this device when SPKVDD is 5V and when SPKVDD is 3.3V?
Regards,
Tamura
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Hello.
I understand that the voltage of SPKVDD is greater than or equal to AVDD, but what difference does it make in the operation of this device when SPKVDD is 5V and when SPKVDD is 3.3V?
Regards,
Tamura
Hi Tamura,
SPKVDD supply is specifically used to power the Class-D driver (SPKP/SPKM), so the voltage on this rail will determine how much voltage/power you can drive to that speaker.
Best regards,
-Ivan Salazar
Applications Engineer
Hi Ivan,
Thanks for the answer.
Am I correct in understanding that the voltage/power of the speaker drive is determined by the voltage of the SPKVDD, which will affect the maximum volume of the speaker?
If there is a difference in maximum volume, how much difference is it?
Tamura
Hi Tamura,
You can refer to the data sheet Figures 4-10 and 4-12. These show the output power performance for different SPKVDD levels: https://www.ti.com/lit/ds/symlink/tlv320dac3100.pdf#page=15
Best regards,
-Ivan Salazar
Applications Engineer