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BQ25730: ADC

Yoshinobu Kagawa
Expert 2030 points
Part Number: BQ25730


1.
9.6.7 ADCVBUS/PSYS Register (I2C address = 27/26h) About PSYS
Is it correct to understand that the voltage reflected in the PSYS register is the AD-converted data of the voltage output to the PSYS pin?

2.
9.6.16 ADCOption Register (I2C address = 3B/3Ah) [reset = 2000h] ADC_CONV and ADC_START
If ADC_CONV is set to 1b (Continuous update), is it correct that once ADC_START is set to 1b, it will not be automatically reset to 0b and will continue?
Also, is it correct to set ADC_START to 0b when I want to stop it?

3.
About ADC function
Enable/Disable can be set for each value, but is there any advantage to setting it to Disable? (Is there any trade-off in terms of functionality or performance?)
Similarly, is there any advantage to using 1-shot acquisition compared to continuous acquisition?

Regards,
Kagawa





  • 0
    TI__Mastermind 34535 points

    Hi Kagawa-san,
    You have a lot of questions for the detailed operations of the BQ25730. The datasheet provides a lot of application information. Some of the detailed operation can be studied and understood with an EVM evaluation. We could not provide some of the details due to the IP protection. We suggest you order a BQ25730 EVM to test. This will provide the first-hand information and can answer a lot of your questions. I am running out of bandwidth to answer the questions with all the details. We need your help to do the evaluation first to understand the basic operations, and many of the cases you asked could be addressed. If you still have more questions, please send me the waveforms and we can discuss form there.

    Regards,

    Tiger

  • 0 in reply to Tiger Zhou
    Expert 2030 points

    Hi Tiger-san,

    I apologize for making so many questions.
    When you are well enough, we would appreciate it if you could answer the questions that you can answer.

    Regards,
    Kagawa