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Original question:

TPS4H000-Q1: Schematic design

TPS4H000-Q1: TPS4H000-Q1 _OPEN LOAD detection resistor removal

Chetan Soni
Prodigy 10 points
Part Number: TPS4H000-Q1

Tool/software:

We are using Version A of IC PN TPS4H000-Q1

Question - Impact of not using Pull-Up resistor (R311, R312, R313, R314)_Pull up used for OPEN LOAD detection.

- ONLY fault detection will get impacted?

- Any other issue we will have?

  • 0
    TI__Genius 10405 points

    Hello, 

    Removing the pull-up resistors will affect the open load detection in the fault state. 

    I see that there is a GND network in this application. The reverse current protection diode in the GND network forward voltage should be less than 0.6 V in any circumstances. 

    BR, 

    Alan

  • 0 in reply to Alan Whitehead
    Prodigy 10 points

    Hi Alan, Thank you for the response, our application does not need OPEN LOAD detection capability hence if we remove the pull-up resistors will it impact any other functionality?

    BYS10-45HE3_A/H the diode has good VF at 7mA hence maintaining V at GND <0.6V ||| We did optimized 1K as recommended by TI to 100 ohms while encountering failures at -5DegC  

  • +1 in reply to Chetan Soni
    TI__Genius 10405 points

    Hey, 

    Removing pull up resistors will not impact any other device functionality. 

    BR, 

    Alan