• Input overcurrent fault (IIN_OCF) is a programmable threshold which sets the maximum allowed input current for the converter. Detection is based on input current telemetry. When the sensed input current exceeds this limit, the input overcurrent fault condition is detected. Program this threshold using the IIN_OC_FAULT_LIMIT command. TPS53676 supports values of 4 to 128A.
• Input overcurrent warning (IIN_OCW) is a programmable threshold which sets a warning threshold for the input current for the converter. Detection is based on input current telemetry. When the sensed input current exceeds this limit, the input overcurrent warning condition is detected. Program this threshold using the IIN_OC_WARN_LIMIT command. TPS53676 supports values of 4 to 128A.

In response to the input overcurrent fault, the TPS53676 responds according to the configured fault response in the IIN_OC_FAULT_RESPONSE command. When not set to the ignore response, this causes the PWM pins for both channels to tristate immediately. TPS53676 then sets the appropriate status bits in STATUS_WORD and STATUS_INPUT and asserts the SMB_ALERT# line if these bits are not masked.