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Hello team,
My customer want to use the TPS1H100B-Q1 for current limit protection only without using other diagnostics.
Is it O.K. to connect the DIAG_EN pin to device GND in this case also as attached schematic below?
Best regards,
DY
Hi,
Yes, if you do not need the current sense analog output from the current sense pin, you can short the DIAG_EN pin to GND.
Hi Anthony,
Thanks for your quick response.
You mean the TPS1H100B-Q1 can suport the current limit protection by setting the current limit threshold(my customer's case: 2.466A) with exteral 1 kohm resistor at CL pin even though the DIAG_EN pin is connected to GND. Am I understanding correctly?
Best regards,
DY
Hi DY,
With a 1kOhm resistor, the calculated current limit is 3.0825A. If you'd like to set the current limit to 2.466A, you should use the closest resistor value to 1.25-kOhms.
In regards to your question, yes, the device can support current limit protection with the DIAG_EN pin connected to ground.
The DIAG_PIN when pulled high enables diagnostics, which in the case of the B version, allows for measuring the current as a voltage level using an external resistor.
If you do not need external current measurents, then it is fine to pull the DIAG_EN pin to ground.
Oh yes, my mistake it looks like I had incorrectly referenced a number. The 1-kOhm is correct.
My apologies.