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DRV8662: Question of DRV8662 Specification of Gain

Wayne Chen (Audio AE)
Genius 15950 points
Part Number: DRV8662

Hi Sirs,

Does the specification of gain of the DRV8662 datasheet GBW, which means we can support frequency range 20kHz/28.8dB = 20kHz/27.54V/V = 726.15Hz with 50V VPP configurations?



Thank you and Best regards,

Wayne Chen
08/10/2020

  • 0
    TI__Guru* 84915 points

    Hi, Wayne,

    The BW spec in the datasheet means that the DRV8662 is capable to reach up to 50V from 0 to 20KHz. If higher output is required, the bandwidth will be reduced.

    Let me know if you have additional questions or comments.

    Best regards,
    Luis Fernando Rodríguez S.

  • 0 in reply to Luis Fernando Rodriguez S.
    TI__Genius 15950 points

    Hello Luis,

    The specification could be GBW according to my frequency response plots on the DRV8662 EVM with 110nF piezo actuator load.
    Would you please provide recommendations of them?

    VBAT = 5V. GAIN=0GAIN1=High

    VIN to VOUT

    Full Scale Vout = 37.21Vrms @ 1kHz

    Full Scale Input Vin = 1.28Vrms @ 1kHz

    Frequency Response:

     

    Zoom-IN (f-3dB at 1.6kHz)

     

    Thank you and Best regards,

    Wayne Chen
    08/20/2020