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USB-PD-CHG-EVM-01: USB-PD-CHG-EVM-0

Dayle Swensen
Prodigy 10 points
Part Number: USB-PD-CHG-EVM-01
Other Parts Discussed in Thread: BQ25750, BQ25798

Tool/software:

I would like to use the USB-PD-CHG-EVM-01 in a test application for testing mobile charging bricks and other charging devices. I was wondering if the  USB-PD-CHG-EVM-01 can be programmed to negotiate at a certain power level, such as 20 VDC @ 5 amps, etc., so that when it was connected to a device under test, it would discharge the device at that power level.

Also, I was wondering if there is an API that can be used to access the USB-PD-CHG-EVM-01 by a custom program so that I can automate the use of this device during a test.

Thanks in advance for all your help.

Regards,

Dayle Swensen

  • 0
    TI__Guru**** 162946 points

    HI Dayle,

    If you are asking about the BQ25798 charger, its max input current in sink/charge mode is 3.3A.  In reverse/source mode, it can provide up to 3.3A depending if battery voltage closer to 20V) and if fsw=750kHz.  If the battery voltage to 20V differential is large (resulting in low efficiency) or ambient temp is high or the 3.3A charge current limit is disabled, the charger IC package gets too hot, forcing the converter into thermal regulation, which reduces output power.  For 20V @5A, I recommend moving to a converter with external FETs like BQ25750 family.

    Regards,

    Jeff