Flex Power Modules introduces the BMR316, a high-performance non-isolated, unregulated DC/DC intermediate bus converter (IBC) specifically designed for AI and ML data centre applications that demand-intensive computational power. The compact BMR316 is suitable for other high-power IBC applications where board space is limited.
The BMR316 features a fixed 4:1 conversion ratio, efficiently stepping down 48V to 12V. It provides a continuous power output of 1 kW and can deliver peak power up to 3 kW. With a power density exceeding 900 W/cm3 (15 kW/in3) during peak load, the BMR316 is housed in an ultra-compact package measuring just 23.4 x 17.8 x 7.65 mm. It operates within an input range of 38 – 60 V (68 V peak), delivering an output of 9.5 – 15 V.
The BMR316 is designed to work seamlessly with a variety of voltage regulator modules (VRMs) and Point-of-Load (PoL) converters, further converting the intermediate bus to core voltages needed further downstream in AI and datacom centres. These environments require high peak power handling, efficient use of board space, and optimised energy efficiency.
With a peak efficiency of 97.7 per cent at half load, the BMR316 enhances cooling performance by reducing thermal demands, and low-profile design make it ideal for cold wall mounting or direct-to-chip liquid cooling solutions.
Additional features include fast load-transient response, high current-monitoring accuracy, and a calculated MTBF of 7.43 million hours. The BMR316 meets the latest IEC/EN/UL 62368-1 safety standards with built-in protection and warning systems.
The product is also supported by Flex Power Designer, a popular software tool that offers configuration, performance simulation, and monitoring capabilities, all with full control via a PMBus interface. The software tool is available for free download at www.flexpowerdesigner.com.
The BMR316 will be on display at the Flex Power Modules booth in Hall C3 #439 during electronica Munich, Germany, from November 12-15, 2024.
Samples are available now, and the BMR316 is expected to be released to mass production in January 2025.
