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Original question:

BQ25672: BQ25672 charging issue

BQ25672: Power management - INTERNAL forum

Akshar Gandhi
Intellectual 1470 points
Part Number: BQ25672

Tool/software:

Hello team,

This query is in continuation of this thread: https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1466920/bq25672-bq25672-charging-issue?tisearch=e2e-sitesearch&keymatch=BQ25672#

The customer has shared schematics and sees that when he has shorted the D+/D- pins to ground, the system operates nominally. Do we have to ground the pins or leave them NC when not using the USB input?

We have checked the ILIM_HIZ pin and it does not get grounded at any time but the regular operation doesn't start.

Looking forward to your help!

Thank you,

Akshar Gandhi

  • 0
    TI__Guru**** 166456 points

    Hi Akshar,

    If left floating, the D+/D- algorithm detects unknown adapter and sets input current limit register to the lower of ILIM_HIZ resistor clamp or 3A.  If shorted, the algorithm detects DCP and sets IINDPM to the lower of 3.25A or ILIM_HIZ resistor clamp. 

    Regards,

    Jeff