Flex Power says BMR683 targets RF power amplifiers for 5G
The BMR683 series of digital PMBus DC/DC converters is designed for use in radio frequency power amplifier (RFPA) applications and infrastructure for the 5G telecomms market. The converters, released by Flex Power Modules, provide monitoring and control of the feedback loop to help stabilisation.
The high-density BMR683 converter is in an industry-standard quarter brick format, measuring 58.4 x 36.8 x 12.7 mm (2.3 x 1.45 x 0.5 in).
It has an output power up to 500W at 28Vout, and an input voltage range of 36V to 60V. The output voltage can be adjusted from 14V to 35V. This allows for easy optimisation of the connected RF section, Flex Power notes. Efficiency is up to 95.5 per cent at full load.
The BMR683 includes a digital interface for the first time for GaN and LDMOS RFPA applications. For RFPA applications using 28 V gallium nitride (GaN) or laterally diffused MOSFET (LDMOS) power amplifier designs, it 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 and to optimise the module’s control loop for stable operation in a variety of circumstances. There are also configurable soft start / stop, precision delay, and ramp-up power management features.
Over-voltage, over-temperature and short-circuit protection mechanisms enable a prolonged operational lifespan, with a mean time between failures (MTBF) of over five million hours (Mh).
The BMR683 DC/DC converters comply with IEC/EN/UL 62368-1 safety standards. Operating temperature range is -40 to +125 degrees C.
Flex Power Modules, a business line of Flex, manufactures scalable DC/DC power converters primarily serving the data processing, communications, industrial and transportation markets. The company offers a range of both isolated and non-isolated solutions, its digitally-enabled DC/DC converters include PMBus compatibility supported by the Flex Power Designer software tool.