Hello Lithiyashree,

Are you asking about the Error ADC or the 12-bit ADCs calculation? The Error ADC and the 12-bit ADC or two different pins that measure signals differently. The Error ADCs are primarily used as the input to the PID filter for the control loop. The Error ADCs have faster sense so the control loop has a fast transient response. The 12-bit ADCs are used for general signal measurement or as a comparator to trigger a fault. The 12-bit ADCs typically have sampling rate of 268kS/s, which is considerably slower than what the control loop will require.

Please see this E2E post as an example on how the 12-bit ADC values are calculated in the Half Bridge LLC firmware: https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1343727/ucd3138allcevm150-calculations-for-sensing-of-primary-current-signal-ips-and-calibration-in-firmware-for-the-same/5170546?tisearch=e2e-sitesearch&keymatch=%25252525252525252520user%2525252525252525253A525510#5170546

Regards,

Jonathan Wong