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Original question:

TPS1HTC30-Q1: TPS1HTC30-Q1 48V capabilities

TPS1HTC30-Q1: Short-circuit and overload protection

Matei Serbanescu
Prodigy 20 points
Part Number: TPS1HTC30-Q1

Tool/software:

Hello community,

This high-side switch offers output short-circuit and overload protection and these features are graphically explained in Figs. 8-8 and 8-9 of its datasheet.

However, both graphs introduce some parameters which are not numerically given elsewhere, e.g., Iovcr, Icl, Iclenps, Icl_linpk, etc.

Could you kindly provide an explanation for those? Maybe in relation to the Ilim set threshold.

For the application I have in mind I would go for 6 A, while switching a voltage rail of 48 V. Also, the application involves driving multiple loads, inductive, resistive or capacitive.

Many thanks!

  • 0
    TI__Expert 7981 points

    Hi Matei,

    -The IOVCR value is an internal limit set for when the current limit loop has not asserted yet.

    -The ICL_ENPS parameter characterizes the current limit that the device is actually clamping at versus what it is set to because it can initially exceed the externally set limit in capacitive charging or short to ground cases.

    -ICL = ILIM = current limit set through the ILIM/current limit pin.

    -The ICL_LINPK parameter is more for a general overcurrent condition (not as severe as short to ground or large capacitive inrush - sudden large change in impedance) or small change in impedance. This is about the maximum current the device will see before the current limit has fully asserted.

    Thanks,

    Rishika Patel 

  • 0 in reply to Rishika Patel
    Prodigy 20 points

    Thank you! 

    For each of those parameters, do their values depend on the ILIM limit or represent universal thresholds?

    What's the expectation if I set ILIM to 6A?

    Kind regards!

  • 0 in reply to Matei Serbanescu
    TI__Expert 7981 points

    Hi Matei,

    I am getting more information on this, I will get back to you soon.

    Thanks,

    Rishika Patel