Loop control detection circuit

摘要

A loop control detection circuit (100) is provided for detecting feedback values in a current feedback control loop to determine if the control loop is in or out of control. The loop control detection circuit (100) includes a comparison circuit and a register circuit. The comparison circuit includes a first comparator (102) and a second comparator (106) that receive a feedback control loop signal from a current feedback control loop that is provided as the gate or gate-to-source voltage of a low side dri the current feedback control loop is out of control in response to receiving the first comparison output signal in a state indicating that the first reference signal is larger than the feedback control loop signal. The second loop control detection signal is generated in a state indicating that the current feedback control loop is out of control in response to receiving the second comparison output signal in a state indicating that the second reference signal is less than the feedback control loop signal. The enabling circuit (110) receives the first loop control detection signal and the second loop control detection signal and generates a loop control detection signal (120) in a state indicating that the current feedback control loop is out of control in response to receiving the first loop control detection signal or the second loop control detection signal in a state indicating that the current feedback control loop is out of control.