Tool/software:
I found some interesting typos when looking at the current limit accuracy.
The datasheet says "Accurate adjustable current limiting" and then whips down to section 7.5 where there's apparently a whopping 20% tolerance on the value.
There is a - sign before the ) character "External current limit accuracy, ( I OUT – ICL × KCL –) × 100 / ICL × K CL" I assume this is supoposed to read "(I_OUT-I_CL*KCL)(100) / I_CL*K_CL"
Am I reading this right? Is dKCL/KCL actually the variance in KCL, meaning if I want a 1A guaranteed minimum current limit, I would actually neeed a 1.6kΩ resistor?
I figure if I want a minimum threshold current limit of 1A,
RCL=80%*KCL*VCL/ICL
Where KCL=2000 (datasheet constant 2500 scaled by -20%)
VCL=0.8V (datasheet constant)
ICL = 1A (user defined limit we want)
That gets me 1.6kΩ. I guess that will also mess with the R_CS value, but I wanted to check that I didn't misinterpret this characteristic and it does in fact apply to the KCL variable.
Out of curiousity, what is driving this variance? Part tolerance? Is it affected negatively by temperature or operational voltage or is it just a characteristic of the output current monitoring feature? Also I wouldn't call 15% very accurate so I'm wondering if I'm just being dense and this tolerance applies to something else.
