TAS2781: Operating Current on AVDD IOVDD and PVDDL

Hi

For AVDD and IOVDD you may refer to data sheet Typical Current Consumption table at bottom of page 9: https://www.ti.com/lit/ds/symlink/tas2781.pdf#page=9&zoom=100,0,700

PVDDL may depend on the output power level and the power mode configuration. If POWER_MODE1, PVDDL would drive the output for the region before the efficiency stepping down as shown in Figures 6-15 and 6-17, with that efficiency plot you can estimate PVDDL consumption. If POWER_MODE0 then PVDDL would be close to idle consumption as it won't drive the output.

Best regards,
-Ivan Salazar
Applications Engineer

Hi Salazar

Thanks for your reply. I still have some confusion about this.

For AVDD and IOVDD, the table seems to not show current under Normal mode.

We used external power supply for PVDDH and PVDDL.

PVDDH: DC mode 9-12V, AC mode 20V

PVDDL: AC and DC mode always 5V

So, which is our power mode and configuration?

Hi

Can you elaborate on what "Normal mode" is?
External PVDDH and PVDDL can be power modes 0 or 1 (mode 0 would force PVDDH while mode 1 enables Y-Bridge feature). Both of these modes are included in the table, and as you can notice the consumption values are similar.

Best regards,
-Ivan Salazar
Applications Engineer

Hi

"Normal mode" means PA works under normal condition. 

Hi

Do you know which power mode would be used? As mentioned above, I think you may be using either power mode 0 or 1, depending on the PVDDH scheme required by your application.
In any case, both of these modes are included in the table:

There should be no big difference in AVDD and IOVDD for idle vs playing, as most of the consumption during playback is driven from PVDDL or PVDDH.

Best regards,
-Ivan Salazar
Applications Engineer