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[TDA3] Inquiry of LP8731 on TIDA-00530

Nate Lee
Intellectual 2515 points
Other Parts Discussed in Thread: TIDA-00530

Hi Team,

For TIDA-00530, there is commented using LP8731 (1.8V, 1.2V, 1.06V, 1.06V)

But LP8731 is default value is different as buck(1.06V/1.06V)+LDO(2.8V, 3.2V).

As you know, this value have to be written new value what TDA3 needed it due to power sequence.

Could you recommend suitable device right output value for TDA3 instead of LP8731?

Or other solutions for my customer issue?

 

Regards,

Nate

  • 0
    TI__Genius 15120 points
    Hi Nate,

    This is what I found in TIDUAW5.pdf

    "The LP8731 integrates 2x DC-DC converters + 2x LDO, and is used to generate the core voltages for
    the DSP and EVE co-processor onboard the TDA3x, as well as two lower power rails. The device is
    optimized for size, eliminating most external components. Rather than use external resistor dividers
    to set output voltages, the device comes with pre-set values, which are then adjustable via an I2C
    interface. The default values are 1.06V for the DC-DCs, 2.8V for LDO1, and 3.3V for LDO2.
    Unfortunately the LDO voltages are not correct for this application, and need to be re-programmed
    after power-up (see the LP8731’s product page for a configuration GUI). However, customers wishing
    to order this part in volume can work with TI to order parts with custom voltage settings for their
    application at no extra cost, as this is simply controlled by OTP settings and not a change to silicon."

    Hope this helps,
    Regards,
    Stan
  • 0 in reply to Stanislav Stilyanov
    TI__Intellectual 2515 points

    Hi Stan,

    thanks for quick response.

    can you share the inforamtion the volume for OTP setting by email?

    Regards,

    Nate

  • 0 in reply to Nate Lee
    TI__Genius 15120 points
    Hi Nate,
    I've contacted the appropriate guys by email and added you in copy.
    For the record, typically TI customers should contact their TI sales representative for similar queries.
    Regards,
    Stan
  • 0 in reply to Stanislav Stilyanov
    TI__Intellectual 2515 points
    Hi Stan,
    Can you suggest alternative solution instead of using LP8731?

    Regards,
    Nate