Flex DC-DC intermediate bus converter has fixed 8:1 input/output voltage ratio
Flex Power Modules’ BMR320 is a non-isolated, unregulated, DC-DC intermediate bus converter with a fixed 8:1 input/output voltage ratio in a compact form-factor.
The product operates over a 40.0-60.0Vdc input range, producing a 5.0-7.5.0Vdc output, which is suitable for powering point of load converters at lower intermediate bus voltages. The BMR320 is rated at 400W/60A at 54.0V input and achieves a power density of 128W/cm3 (2126W/in3), measuring just 27x18x6mm.
With efficiency peaking at 97.7 per cent, up to three units can be paralleled for a total load of 1080W. The parts are designed for top-side cooling to a heatsink with airflow or for liquid cooling via a thermal block, and the relatively flat design of the topside of the converter allows for easy connection via a thermal interface material such as a gap pad.
The unregulated, non-isolated architecture used in the BMR320 reduces the output impedance of the converter when compared to regulated designs, claims the company, which effectively reflects the input bus capacitance efficiently to the output, enhancing its ability to cope with large load transients with minimal ‘droop’.
The BMR320 protection features include output current limit and over-voltage, over-temperature and input undervoltage. A PMBusTM interface is included for monitoring and control and the part is supported by the Flex Power Designer Tool.
Anders Sellin, strategic product manager at Flex Power Modules commented: “The BMR320 intermediate bus converter is designed for optimum system efficiency when used alongside point of load converters and integrated power stages such as our BMR510 and upcoming BMR515. It is a great solution for datacom, cloud computing and AI applications, where power density, efficiency and low cost are critical factors.”
The product will be available in OEM quantities by the end of this year.
Flex Power Modules is a manufacturer and solution provider of scalable DC/DC power converters primarily serving the data processing, communications, industrial and transportation markets. Offering both isolated and non-isolated solutions, its digitally-enabled DC/DC converters include PMBus compatibility supported by the Flex Power Designer.
