Flex Power Modules Introduces 8:1 Non-Isolated Bus Converter

8:1 Non-Isolated Bus Converter, a non-isolated, non-regulated DC-DC intermediate bus converter with a fixed 8:1 input/output voltage ratio in a compact form factor.

It operates over a 40-60 VDC input voltage range and produces a 5 to 7.5 VDC output voltage, making it ideally suited for powering point-of-load converters at lower intermediate bus voltages to optimize system efficiency. Rated at 400 W/60 A at an input voltage of 54 V, the BMR320 achieves an outstanding power density of 128 W/cm3 (2126 W/in3) in a small footprint of 27 x 18 x 6.4 mm. With a peak efficiency of 97.7%, up to three units can be connected in parallel to achieve a total load of 1080 W. The product is suitable for use with airflow to airflow applications. Suitable for top cooling of heat sinks with airflow or liquid cooling via a heat block, the converter's relatively flat top design allows you to easily make connections to cooling surfaces via heat transfer materials such as thermal pads.

The unregulated, non-isolated architecture used in the BMR320 reduces the converter's output impedance compared to a regulated design, effectively feeding the input bus capacitance back to the output with high efficiency, enhancing its ability to cope with large load transient jumps with minimal "droop voltage".

The BMR320's protection features include output current limit and overvoltage protection, as well as over-temperature and input undervoltage protection. The product also features a PMBusTM interface for monitoring and control, which is supported by the Flex Power Designer Tool.

Anders Sellin, Strategic Product Manager for Flex Power Modules, commented: "The BMR320 Intermediate Bus Converter is designed for optimal system efficiency when used with point load converters and integrated power stage products such as our BMR510 and the upcoming BMR515. It is a great solution for datacom, cloud computing and artificial intelligence applications where power density, efficiency and low cost are key factors."

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