DALLAS Ericsson's PKJ family of dc/dc modules (nominally 48 V in, 3.3 V out) offers up to 30 A at 60 degrees C without a heat sink. The company says it achieved those stats via a proprietary topology, planar magnetics and a low-resistivity pc-board technology, yielding overall efficiencies of more than 90 percent.
The PKJ4910 PI delivers 30 A at an ambient temperature of 60 degrees C with minimum airflow of 1.5 m/s. The PKJ 4510 PI delivers 15 A (free convection).
The module baseplate spreads heat to eliminate hot spots, enabling full power up to a 100 degrees C case temperature. Mean time between failures is said to exceed 3 million hours.
The PKJ can also be used with a heat sink, for application in extreme environments.
Line and load regulation is specified at 1 mV. Output ripple and noise are75 mV peak to peak. The modules offer protection against low input voltages, short circuits, overtemperature and output overvoltage. Remote-control and output-voltage-adjustment capabilities are provided.
The family is said to comply with international safety, EMC, shock and vibration standards. Pricing for orders in the thousands is $73 each for the PKJ 4910, $83 for the PKJ 4610 (20-A output) and $93 for the PKJ 4510.
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EETInfo No. 621