By combining proprietary drive and control circuits with planar magnetics and low resistivity multilayer pc board technology, the PKJ family of 3.3V dc-to-dc converters can deliver up to 30A at 90% efficiency, with some models reportedly attaining efficiencies as high as 92%. The converters' patent-pending topology uses active rectification in an industry-standard, 58 x 61 x 12.7 mm package to deliver rated current of 15A, 20A and 30A without a heatsink. PKJ converters deliver full power up to case temperatures of 100°C, with their integral baseplate spreading heat to eliminate hotspots andincrease MTBF to >3 million hours. They also have built-in input and output filters, as well as numerous control and protection features.Without a heatsink, Model PKJ4910 requires only 1.5 m/s of airflow to deliver 30A at a 60°C ambient temperature, while PKJ4510 delivers 15A with free convection cooling. The isolated dc-to-dc converters have a 36V to 72V input range, with their remote sensed output factory set to 3.30V ±50 mV and adjustable from 2.5V to 3.6V.