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To protect against load faults, the PT4400 series mcor- porates output over-current protection. Applying a load that exceeds the converter's over-current threshold (see applicable specification) will cause the regulated output to momentarily fold back and shut down. Following shutdown the module will periodically attempt to auto- matically recover by initiating a soft-start power-up. This is often described as a "hiccup" mode of operation, whereby the module continues in the cycle of succesive shutdown and power up until the load fault is removed. Once the fault is removed, the converter then automatically recovers and returns to normal operation.