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BQ25628: PMID

Yoshinobu Kagawa
Expert 1810 points
Part Number: BQ25628

1) If PMID is not used, should the PMID and PMID_GD pins be OPEN?

2) The description of tPOORSRC_RESTART says after latch-off. Does this mean that it will not return for 15 minutes and will check again after 15 minutes? (Does it return immediately once the anomaly is cleared?)
 
    

3) What is the state of Sleep mode as it relates to VSLEEP and VSLEEPZ?

    

Regards,
Kagawa

  • 0
    TI__Mastermind 19235 points

    Hi Kagawa, 

    thank you for reaching out via E2E. Please see my answers to your questions below. 

    1) If PMID is not used PMID_GD pin can be left open. PMID pin still requires input capacitors. TI recommends a 10 uF capacitor and a 0.1 uF capacitor. 

    2) The tPOORSRC_RESTART spec refers to the amount of time the device will wait before restarting the poor source detection routine after it has already failed 7 consecutive times. Therefore, before the device waits 15 minutes it will attempt the poor source detection routine every 2 seconds (tPOORSRC_RETRY). Let me also note if the adapter is re-plugged in the device will immediately restart poor source detection.  

    3) The sleep mode specification has a VBUS falling threshold (VSLEEP) and a VBUS rising threshold (VSLEEPZ) so there is some built in hysteresis. Device will enter sleep mode when VBUS reduces to approx. 45 mV above VBAT, and cannot exit sleep mode until VBUS is approx. 220 mV above VBAT. 

    Best Regards,

    Garrett 

  • 0 in reply to Garrett Kreger
    Expert 1810 points

    Hi Garrett-san,

    Thank you for your qeply.

    Is it correct that Sleep mode means that the REGN LDO is powered off and the Converter is powered off?
    Which of the following applies to the Quescent Current in Sleep mode?



    Regards,
    Kagawa

  • 0 in reply to Yoshinobu Kagawa
    TI__Mastermind 19235 points

    Hi Kagawa-san, 

    Yes, in sleep mode converter and REGN are powered off. The HIZ quiescent input current (IQ_VBUS_HIZ) listed in the table you attached applies in sleep mode. 

    Best Regards,

    Garrett