# LTM4686 overcurrent limit

Hi,Support team,

I evaluate DC2722 with the condition of attached settings.

LTPowerPlay GUI ver.is latest (v1.5.1.0)

There are three unclear points about overcurrent limit function.

a) The current limit works at greater than IOUT_OC_FAULT_LIMIT value.

 setting value on LTPowerplay measured value by current probe 9.703A 11.12A 6.298A 7.35A 4.000A 6.2A

b) MFR_IOUT_CAL_GAIN_TC is a positive value, but it seems that the current limit value goes smaller if LTM4686 is cooler.

c) Even though MFR_PWM_MODE [7] = 1 is set, it can be set to a limit value smaller than 37.5mV/IOUT_CAL_GAIN,

and the actual operation also works with that value.

example) setting 6.398A with MFR_PWM_MODE[7] =1 , current limit works at 6.852A.

Can you tell me why the above is happening?

/cfs-file/__key/communityserver-discussions-components-files/330/LTM4686_5F00_settings.txt

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