Quarter brick 500W digital DC-DC converter for radio front end

September 29, 2020 //By Nick Flaherty
Quarter brick 500W digital DC-DC converter for radio front end
The BMR683 500W quarter brick digital PMBus DC-DC converter from Flex Power Modules is aimed at radio frequency power amplifier (RFPA) applications

Flex Power Modules has launched a 500W quarter brick digital DC-DC converter for the 5G infrastructure market.  

The BMR683 DC-DC converter has an output power up to 500 W at 28 Vout, and an input voltage range of 36 V to 60 V. Efficiency peaks at 95.5 percent at full load, and a broad output voltage adjustment range of 14 V to 35 V, allowing for easy optimization of the connected RF section.

For RFPA applications using 28 V gallium nitride (GaN) or laterally diffused MOSFET (LDMOS) power amplifier designs, the high-power converter provides a digital PMBus interface to allow easy monitoring of input and output voltages, output current, and device temperature. The device also allows users to configure many aspects of the device operation including voltage and current for improved fault tolerance, and optimization of the module’s control loop for stable operation in a wide range of circumstances. Power management features also include configurable soft start/stop, precision delay, and ramp-up.

Sophisticated over-voltage, over-temperature and short-circuit protection mechanisms enable a prolonged operational lifespan, with a mean time between failures (MTBF) of over 5 million hours (Mh).

As with all Flex Power Modules’ DC-DC converters, these units comply with IEC/EN/UL 62368-1 safety standards. The devices offer an operational temperature range of -40°C to +125°C. The industry-standard quarter brick DC/DC converter measures 58.4 x 36.8 x 12.7 mm (2.3 x 1.45 x 0.5 in).

“The BMR683 combines exceptional efficiency, power density and reliability with increased design flexibility and monitoring functionality by including a digital interface for the first time for GaN and LDMOS RFPA applications. The control optimization especially makes this new solution ideal for dealing with the load fluctuations in FPGA applications,” said Olle Hellgren, Director Product Management and Business Development at Flex Power Modules.

flexpowermodules.com

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