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TPS25750: Source detection and charging setting issue

FRANK1
Expert 8555 points
Part Number: TPS25750

Hi sir,

I have a query on source detection and charging settings of TPS25750.

If I wanna change of source detection and charging settings,
Can I create custom applications through GUI tools?
When the charging current is controlled according to the detected specification on the source side
How to set it on the GUI tool?
Or will the IC automatically limit and adjust the current?

Set the charging voltage and charging current in settings 9 ~ 12 on the GUI tool.
Is this the value when the condition for requesting sink power selected in setting 3(15W/5V) is met?

If the detected power supply specification on the source side does not meet the conditions selected in setting 3 (15W/5V),
or What kind of control will be carried out when the charging cannot be carried out under the set charging conditions?
For example, for the setting of 15W (5V / 3A), when 7.5W (5V / 1.5A) of USB type-C is connected
Imagine using a USB a to C cable to connect to a charger or USB port other than type-c.
What happens?

Thanks for your clarification.
Regards,

  • 0
    TI__Mastermind 32731 points

    Hello Frank,

    The TPS25750D will automatically detect the case where a legacy charger (Not Power delivery) is connected to the type C bus and negotiated the appropriate power based on the RP/RD resistor combinations presented on the CC lines.  It will switch to a 900mA, 1.5A, or 3A current limit automatically to match the charger connected.

    You are able to change the supported sink PDOs within the App Config GUI.  Here is a link to the tool.  https://dev.ti.com/gallery/info/1769824/TPS25750_Application_Customization_Tool

    In the basic operation mode of the part, we support 4 very common voltages 5, 9, 15, 20V at a 3A current limit.  If you wish to change this setting, you can enter the advanced tab and generate your own voltage and current combinations up to a total of 7.

    Please take a look at the GUI and familiarize yourself with it's capabilities and reach back out with any further questions.

    Regards,

    Chuck