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[FAQ] TDA4VL-Q1: POK TRIM Value Setting

Josiitaa RL
Guru 57951 points

Part Number: TDA4VL-Q1
Other Parts Discussed in Thread: TDA4VL

What are the recommended POK TRIM value settings for each POK instance?

  • 0
    TI__Guru 57951 points

    Hi,

    THE POK Threshold TRIM refers to Software-configurable values (0-127) to set UV/OV detection thresholds. This is a 7 bit value (0-127) configured via the POK control registers for each instance. The POK trim values have different valid ranges depending on the POK type. Not all values 0-127 are valid.

    The TDA4VL device TRM has below "POK Threshold Levels" table for the limits -

    • The Green box annotated indicates the valid regions.
    • The Red colored high end of the range (beyond TRM limits) are invalid and produce non-intuitive behavior

    In summary, the following table shows the ranges for each POK type based on TI validation -

    UV Threshold (in hex) OV Threshold (in hex)
    Core 0x0 - 0x46 0x0 - 0x4A
    1.8V 0x20 - 0x44 0xC - 0x30
    3.3V 0x0 - 0x44 0x0 - 0x2F

    Note: The above ranges are inclusive. Values outside these ranges produce undefined/invalid behavior.

    To calculate the TRIM values based on your target voltage, the following approach is recommended -

    • Identify your POK type (CORE, 1P8, or 3P3)
    • Use the appropriate formula from "POK Threshold Levels" table
    • Solve for POK_TRIM given your desired threshold voltage
    • Verify the calculated trim value is within the valid range

    Regards,

    Josiitaa