Flex Power Modules has now launched the BMR320, a non isolated, non regulated DC-DC intermediate bus converter with a fixed 8:1 input/output voltage ratio and a compact shape. The product operates in the range of 40-60 VDC input voltage to generate 5-7.5 VDC output voltage, which is very suitable for powering the load point converter under low intermediate bus voltage to optimize system efficiency
At an input voltage of 54 V, the BMR320 is rated at 400 W/60 A and can achieve an excellent power density of 128 W/cm3 (2126 W/in3) in a small size of 27 x 18 x 6.4 mm. The peak efficiency of the product is 97.7%, and up to three units can be connected in parallel, reaching a total load of 1080 W. This product is applicable to the top cooling of the radiator with air flow or liquid cooling through the hot block. The relatively flat design of the top of the converter allows you to easily connect the heat dissipation surface through heat conduction materials such as heat conduction pads.
Compared with the stabilized voltage design, the non stabilized voltage and non isolated architecture used in the BMR320 reduces the output impedance of the converter, effectively feedback the input bus capacitance to the output, and enhance its ability to cope with large load transient jumps with the minimum "droop voltage". The protection functions of the BMR320 include output current limiting and overvoltage protection, as well as over temperature and input undervoltage protection. The product also has a PMBusTM interface for monitoring, which is supported by Flex Power Designer Tool.
Anders Sellin, Strategic Product Manager, Flex Power Modules commented: "The BMR320 intermediate bus converter is designed to achieve the best system efficiency when used with point load converters and integrated success rate products, such as our BMR510 and the upcoming BMR515. It is an excellent solution for data communication, cloud computing and artificial intelligence applications, where power density, efficiency and low cost are key factors."
