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TAS2780: For Proximity Detection how long the distance can it detect ? and also how is the power consumption in this mode PWR_MODE3 ?

Part Number: TAS2780

Hi 

For Proximity Detection how long the distance can it detect ? and also how is the power consumption in this mode PWR_MODE3 ?

  • Hi PyTsai,

    In PWR_MODE3 VBAT1S is used as power supply for the output stage, PVDD is not used in this case so you would only account for VBAT1S, AVDD and IOVDD (this last one is usually negligible).

    If you're looking for idle consumption you can refer to Typ Char table in D/S page 9 (expect similar as PWR_MODE1): https://www.ti.com/lit/ds/symlink/tas2780.pdf#page=9 
    If looking for efficiency, you may use Figures 6-14 and 6-16, VBAT1S efficiency would be up to the point before the efficiency drops; efficiency drop happens when the device changes from VBAT1S to PVDD, which would not apply in PWR_MODE3 as it will keep operating on VBAT1S rail.

    Regarding detection specific details, that depends on the rest of the application components; TAS2780 is not detecting the distance by itself as it will only be used to generate the ultrasonic signal, there must be some ADC in the systems to detect that signal back.

    Best regards,
    -Ivan Salazar
    Applications Engineer