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TPS2HB35-Q1: schematic review

YEPENG ZHANG
Prodigy 85 points
Part Number: TPS2HB35-Q1

Hi TI engineers，

   There is a high side IC TPS2HB35AQPWPRQ1 in our design，this is the first time for us to use this chip  So can you review the schematics for us?

For TI REVIEW.pdf

  • 0
    TI__Mastermind 32650 points

    Hi Yepeng,

    1. I notice that there is no GND network used here. Is there upstream reverse current protection? The device requires a GND network to support the reverse polarity event if there is no upstream protection.

    2. I noticed that EN1 and EN2 do not have protection resistors. Please add the protection resistors to these rails. 

    3. The maximum current that can exit the SNS pin during a fault is 5.3mA and so the voltage could reach 5.3V on the SNS pin. Please make sure the ADC is capable of handling this votlage.

    Thanks,

    Shreyas

  • 0 in reply to Shreyas Dmello
    Prodigy 85 points

    Hi Shreyas， 

        Thank  you for reply！

    1.  I don't understand what no GND network means, this symbol represents the GND network in the schematic diagram

    2. I will add the protection resistor to EN1、EN2 net

    3.Thanks for reminding me, I will add a divider circuit to the ADC network

  • 0 in reply to YEPENG ZHANG
    TI__Mastermind 32650 points

    Hi Yepeng,

    Please view section 9.3.1.5 in the datasheet for more information about a GND network. This is a diode in parallel with a resistor that connect between the IC ground and the module ground to allow the device to survive negative voltage events like reverse battery.

    Thanks,

    Shreyas