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WEBENCH® Tools/TPS40400: Iout Calibration Issue

Part Number: TPS40400

Tool/software: WEBENCH® Design Tools

I use the formula that IOUT_CAL_GAIN(trimmed) = IOUT_CAL_GAIN(untrimed) x [ (Iout2 - Iout1) / (Read_Iout2 - Read_Iout1) and IOUT_CAL_OFFSET = Iout3 - Read_Iout3.

After calibra, our modules will report OCP fault when the load is 12A. And the OCP fault is 15.5A. The calibration error is 3.5A. And the iout is brcame badly. I want to know that how can i use IOUT_CAL_GAIN and IOUT_CAL_OFFSET for calculate the iout. It can help me that whether the calbration data is wrong.

Another question is which is the target value. Iout or Read_Iout?

Thank you very mcuh!