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Tool/software:
Hi,
My customer is inquiring whether the following scenario is ok with the TPS2557
"The application needs 4.24A steady state current and 5.6A peak(50us)/4.62A peak(500ms).
The TPS2557 is marginal as a 5A part current limiter in this case, while if I do push the Rlim (17.4kohm/ 0.1% w/ Rlim_max=17.4174kohmz and Ilim_min=6.002A) or (17.8kohm/0.1% w/ Rlim_max=17.8178kohm and Ilim_min=5.858A). Do you have the mass production concern?"
Thank you
Arief
Arief,
The datasheet shows a 20K minimum for RILIM, so if you push the device beyond this limit, TI cannot guarantee performance beyond these values.
Regards,
Chuck
Thank you Chuck for your reply.
Do you know if there any other TI device in the portfolio that may be able to support the application beyond 5A?
Thanks
-Arief
Arief,
I do not support this family, but the TPS22992 is a close fit for the numbers you are showing. https://www.ti.com/lit/gpn/tps22992
It is not a USB switch so it will not have the internal discharge feature.
Regards,
Chuck
Thanks Chuck for the recommendation.
One question that i have is that is the current limit protection will limit the current to a constant current?
I can only find the short circuit spec on the EC table and the value is around 11A for VBIAS = 5V.
Thanks
-Arief
Arief,
I don't know the TPS22922 part well enough to support it.
You should probably open up a new thread with that part to get specific answers about it.
Regards,
Chuck