Thermal baseplate targets DC-DC converter for telecoms designs

Thermal baseplate targets DC-DC converter for telecoms designs

New Products |
By Nick Flaherty

Flex Power Modules has developed a new version of its BMR480 digital DC-DC converter optimized for telecom applications that require input voltage down to 36Vin.

The BMR480 0113/034 800W/69A DC-DC converter provides an extended input voltage range below 40Vin, as required for telecom power conversion applications. It is optimized for a wider input voltage range of 36Vin to 60Vin, compared to the standard converters in the BMR480 series. It has an efficiency of typically 96.4 per cent at 53V output voltage and half load. The thermal performance is enhanced by a baseplate, which can be connected to a heatsink or cold plate, and the DC-DC converter has an extended operating temperature range of -40°C to +125°C.

The new version of the DC-DC converter also has an output voltage of 12V, which is a common requirement for telecom, and output power up to 800W (output current up to 69A). It provides 1500VDC input-to-output isolation.

The converter provides droop load-sharing capability and monotonic start-up, and it offers protection against output over-voltage and short-circuits, and against over-temperature. Reliability is high, with a mean time between failures (MTBF) of over 6 million hours, and quality is ensured by Flex Power Modules’ highly automated manufacturing processes.

“Telecom applications have specific requirements, and with this new version, we’re delivering what customers in this sector need – while still offering them the proven efficiency, reliability and performance of our existing BMR480 series,” said Olle Hellgren, Director of Product Management and Business Development at Flex Power Modules.

The DC-DC converter is packaged in an industry-standard low-profile quarter-brick form factor, measuring 58.4 x 36.8 x 14.48mm (2.30 x 1.45 x 0.57in). It differs from the existing models in the BMR480 series that are targeted at high-power datacom applications, including intermediate bus conversion (IBC), dynamic bus voltage (DBV) and distributed power architectures (DPAs). More than 15 patents have been filed in relation to the BMR480 family, many directly related to improving efficiency.

The technical specification for the new BMR480 DC-DC converter is available at

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