700W supply targets GaN amplifiers

September 04, 2018 //By Nick Flaherty
700W supply targets GaN amplifiers
Flex Power Modules has launched a series of DC-DC converters targeting radio frequency power amplifier (RFPA) applications in the telecoms market.

The PKJ4000 series delivers 28V DC or 50V DC at up to 700W from an input of 36V to 75V.

The converters are packaged in the industry-standard half-brick format measuring 61 x 57.9 x 12.7mm (2.40 x 2.28 x 0.50 in) and have a power density of more than 255W/in 3 with an efficiency of up to 96.5 percent. Special attention has been paid to thermal design during the development of the product, conduction cooling of the module is optimized via the attached baseplate, which enables full power delivery at up to 85°C ambient, with a 100°C baseplate temperature and zero airflow in closed-box environments, which is typical within RFPA applications. This leads to a calculated MTBF failure rate of 7.5Mhrs.

The first model in the series is the PKJ4716APIHS which provides 28V at up to 25A/700W, with an output voltage adjustment range of 14V to 35V. The seond, the PKJ4716HPIHS, delivers 50V at up to 14A/700W, adjustable from 25V to 55V. The wide range of adjustability of the outputs makes them not only suitable for RFPA applications using LDMOS or GaN transistor technology, but also for other applications and markets that require a regulated programmable bus voltage such as 24V, 28V, 32V, 48V, 50V or 53/54V, Test and Automation, and Industrial Control and Instrumentation.

“The PKJ4000 series is the first of a new expanded range of products we are developing for the RFPA market,” said Olle Hellgren, Head of Business and Product Management at Flex Power Modules. “We see great potential for us to bring the benefits of our leading-edge technology and efficiencies to this area as 5G continues its development and roll-out.”

Other product features of the PKJ4000 series include 1500V input/output isolation, basic level insulation, monotonic start-up, remote sensing, remote control, and a range of protection capabilities including over-temperature, output-short-circuit and output-over-voltage.

www.flex.com  


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