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TPS25833-Q1: Schematics review 5V/3A

Kevin Huang8
Genius 3215 points
Part Number: TPS25833-Q1

Tool/software:

Hi Team,

Please help check TPS25833-Q1 schematics, thanks!

 

  • 0
    TI__Expert 4360 points

    Hi Kevin,

    I recommend making the following changes:

    Add a pulldown resistor on NTC pin to avoid tripping thermal overload protection.

    Recommended C_CSP is 5x22uF, per datasheet Table 11-2.  I would at least include the ability to add 2 more caps in case your loop stability is insufficient.

    Recommend C_BUS is 1-4.7 uF per datasheet Table 11-2

    We generally see 220 nF from each CC pin to GND for ESD benefit.  See datasheet section 8.2, note 4.  I suppose your ESD diodes provide similar protection.

    Regards,
    Eric

  • 0 in reply to Eric Hartigan
    TI__Genius 9825 points

    Hi Eric,

    Can you review the layout also ? thanks!

    TPS25833_USB_PCB Layout .pdf

  • 0 in reply to PYTsai
    TI__Expert 4360 points

    Hi Kevin, PTYsai,

    One thing I missed in the schematic is the inductor current rating.  We recommend 6A saturation current in the datasheet.

    Regarding layout, I only have one piece of feedback.  Why was a polygon added on the second/green layer for CSN? It doesn't seem to get via'ed anywhere except a matching polygon on the top layer.

    Regards,
    Eric