BMR321 Non-Isolated Intermediate Bus Converter

The Flex Power Modules BMR321 non-isolated intermediate bus converter operates over a 40 V_DC to 60 V_DC input range, producing a 5 V_DC to 7.5 V_DC output. The device is housed in a package measuring just 41.47 mm x 17.67 mm x 6.9 mm (1.63" x 0.7" x 0.26") and follows the OCP OAM v2.0 standard, delivering 750 W of continuous output power and a peak power of 1,500 W.

The unregulated device utilizes an 8:1 fixed ratio, meaning the output voltage ranges from 5 V to 7.5 V. This is ideal for applications that require a lower intermediate bus voltage for optimization of overall system efficiency when used in conjunction with downstream POLs, VRMs, or integrated power stages such as the BMR510 and others. With efficiency peaking at 98.4%, up to two units can be paralleled with the inclusion of a SYNC pin to provide a total load of 1,500 W continuously. The parts are mechanically and thermally designed for top-side cooling to a heatsink with airflow or for liquid cooling via a thermal block. The baseplate on the top side of the converter allows for easy connection via a thermal interface material such as a gap pad.