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BQ25886: Electrical specification for internal switching FET

Satoshi
Guru 19645 points
Part Number: BQ25886

Please let me know about the electrical specification for internal FET, QHS and QLS by datasheet P13.

I especially want to know parasitic capacitance, rise time, and fall time (and the other delay time).  

Best regards,

Satoshi

  • 0
    TI__Genius 10240 points

    Hi Satoshi,

    BQ25886 is a battery charger with integrated FETs. The FETs' Rds_on specifications are on page 8 of the datasheets. The switching behavior is fixed and the parametric data related to the switching are internal. Thanks for your understanding. 

    Best regards,

    Eric  

  • 0 in reply to ezhao
    Guru 19645 points

    Hi Eric

    Thank you for reply,

    Is there specification on internal FET the other than Rds_on?

    I want to calculate the peak current for HIgh side ON and Low side ON (SW overshoot and undershoot) timing. 

    Or, is there these test data?

    Best regards,

    Satoshi

  • 0 in reply to Satoshi
    TI__Genius 10240 points

    Hi Satoshi,

    The peak current of the high side and low side FET is more steady state and should be relatively easy. Figure 27 is an example under given conditions. This might not be your conditions. The switching behavior calculation would be difficult and requiring a lot of modeling work. Matching the results and adjust the model could be another project.   

    Best regards,

    Eric