Patent ID: 7105947

Claim:
A power supply comprising: a plurality of DC to DC power converters, each having a pulse width modulation controller having a soft start switch; a voltage tracking and under voltage lockout circuit operable to determine when a voltage level supplied to the power controller reaches predetermined levels and in response provide first control signals to each respective soft start input of the power converter; at least one voltage differential protection circuit operable to detect a voltage differential between voltages generated by a respective pair of the power converters, determine whether the detected voltage level meets specific criteria, and in response provide an appropriate control signal to the soft start switch of each power converter; a plurality of respective ramp circuits associated with respective ones of the power converters, each ramp circuit operable to: receive respective control signals from the voltage tracking and under voltage lockout circuit and initiate turning on or turning off of the respective power converter by providing a rising ramp control signal to each respective soft start input of the power converters according to a time constant of the ramp circuit; and receive respective voltage levels from the at least one voltage differential protection circuit and delay providing the second control signals to the soft start switch of the respective power converter according to a time constant of the ramp circuit.