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Original question:

TPS1H100-Q1: Replace TPS1H100AQPWPRQ1 with TPS27S100

TPS1H100-Q1: Iol,off Off-state output sink current with open load

Hisao Uchikoshi
Genius 14850 points
Part Number: TPS1H100-Q1
Other Parts Discussed in Thread: TPS27S100,

Hi Experts,

Regarding the spec, there is a difference between TPS1H100Q1 and TPS27S100.

TPS1H100-Q1:

TPS27S100:

Customer is worrying if the open load detection conditions are the exactly same for both decices.

Could you please explain why these specs are different?

Regards,

Uchikoshi 

  • 0
    TI__Genius 16390 points

    Hi Uchikoshi-san,

    Let me confirm with the systems team and get back to you on this.

    Regards,

    Yichi

  • +1
    TI__Intellectual 1585 points

    The open load detection spec is exactly the same between the two devices – as can be seen from the current threshold for on-state open load fault detection.

     

     The Iol,off spec is the current flowing into device when the OUT pin is pulled up to the supply voltage VS. This number is characterized at two different voltages for TPS1H100 (13.5V) and TPS27S100 (24V) resulting in different current levels. We use a negative number to indicate current flowing into the pin and the specification is the maximum magnitude of the current.  This spec is differently indicated in the two datasheets, but they are really the same measurement.

     

    Note that this current is useful in determining the pull-up resistor for off-state open load detection. The current flows into the device when the OUT is pulled up with a resistor and needs to be considered in determining the load current threshold that would be detected as a fault in the off-state.