• State TI Thinks Resolved
  • Replies 5 replies
  • Answers 2 answers
  • Subscribers 65 subscribers
  • Views 75 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

BQ25628: Enquiry on BATFET_CTRL_WVBUS

Ke Quan Tok
Prodigy 400 points
Part Number: BQ25628

Tool/software:

Hi BU,

Good day!

My customer would like to clarify BATFET_CTRL_WVBUS setting in BQ25628. Could you help to further explain the red box portion? Thanks for the help!

Regards,

John

  • 0
    TI__Guru** 104835 points

    Hello John,

    Do you have a specific question regarding this bit? The bit's behavior is explained in a couple places within the datasheet, the most thorough section is: 8.3.9 BATFET Control

    But there are other sections which explain the bit's impact in other areas of operation as well.

    Sincerely,

    Wyatt Keller

  • 0 in reply to Wyatt Keller
    TI__Prodigy 400 points

    Hi Wyatt, 

    Thanks for the response. 

    I think customer would like to know when assigning 0h for BATFET_CTRL_WVBUS, does this mean allowing BATFET off / system power reset with adapter present? 

    Customer would like to know what will happen if we assign BATFET_CTRL_WVBUS to either 0h or 1h. 

    Thanks. 

    Regards,

    John

  • 0 in reply to Wyatt Keller
    TI__Prodigy 400 points

    Can you help to simplify for me for this section? Thanks. 

  • 0 in reply to Ke Quan Tok
    TI__Mastermind 26775 points

    Hi John, 

    Please see my explanation below. 

    As shown in table 8-6 in datasheet section 8.3.9 the BATFET_CTRL_WVBUS bit setting has an impact on IC operation as it pertains to ship mode and system reset functions. 

    With BATFET_CTRL_WVBUS = 0h and an input adapter connected.

    • device will enter ship mode after adapter is removed when BATFET_CTRL = 10. BATFET is not forced off until after adapter is removed. 
    • System reset function is ignored/disabled as long as input adapter remains connected.  

    With BATFET_CTRL_WVBUS = 1h and an input adapter connected. 

    • Writing BATFET_CTRL = 10 will force off the BATFET. Then when adapter is removed the device enters ship mode. 
    • System reset function is allowed, even with adapter present. 

    Best Regards,

    Garrett

  • 0 in reply to Garrett Kreger
    TI__Prodigy 400 points

    Hi Garrett,

    Thanks for the clear explanation!

    Regards,

    John