Integrated circuit and method for monitoring and controlling power and for detecting open load state

摘要

An integrated circuit and method for monitoring and controlling power and for identifying an open circuit state at an output port is disclosed. A minimum open circuit current value of the output port is known. A steady state current at the output port is measured for a selected number of times at selected time intervals. A subset of the steady state current values are selected and an average current value is calculated. The average current value is compared to the minimum open circuit current value (if no loads detected) or to a learned open circuit current value (if a load or trailer is detected). A possible open circuit state at the output port is reported based on the comparison.