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TPS2H160-Q1: Current Limit accuracy is out of spec.

Igor Martinovski50
Prodigy 165 points
Part Number: TPS2H160-Q1

Hi,,

I am using the TPS2H160 to provide overcurrent protection on a 28V power rail.

Both channels of the device are wired in parallel and the current limit is set to a value of 1.68A (each output set to 0.83A).

I have noticed that when I slowly ramp the load current, the device actually trips at 2.2A which is greater than the quoted +/15 % in the datasheet..

The same part in a similar application programmed to a trip current of 2.2A also trips higher than expected (~3A)

The circuit is shown below. The load is an electronic load set in constant current mode connected to the same ground.

Any help is appreciated

  • 0
    TI__Expert 3460 points

    Hi Igor,

    All the smart HS CL spec, refers to the hard short condition, not the slow overload condition. While we've seen a slight overshoot when slowly ramping the current, we are not finding applications where this slow ramp actually happens. If you were to change the e-load settings to pulse to 2.2A you would see the 15% target reached.