New mil/aero bus converter halves size and weight requirements

Technology News |
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Operating from the typical 270 VDC (230-330 VDC) MIL-STD-704E/F power rail, the new converter uses Vicor’s proprietary Sine Amplitude Converter (SAC) topology to deliver isolated power to a nominal 45 V rail at more than 96% efficiency, and more than 800 W/in3 power density, with low profile of less than 7 mm, and weight of just 14.5 g.

Systems using the MBCM-series bus converters with downstream PRM Regulators and VTM Current Multipliers to drive pulsed power (e.g. radar) loads, radio and satellite communications, computing processors/ASICs and memory, have a 60% smaller footprint, 3% higher efficiency and enable complete powertrain systems which are 66% lighter than previous best-in-class solutions.

“Power-to-weight is a key metric for any mobile application – whether it’s air-, sea- or land-based – and here, the MBCM270 has a 4x advantage.  It’s all about providing the system designer with small, efficient, lightweight systems with the right power to drive the end application”, explained Stephen Oliver, V.P. of V.I Chip Marketing & Sales.

“That 3% efficiency improvement over previous best-in-class translates into half the power loss, which means half the fans, heatsinks, coldplates, etc.  The MHz switching frequency means smaller, lighter filters too – saving a lot of excess weight and size.”

The 45/48 Vout MBCM270F450M270A00 and its partner 28/33 Vout MBCM270F338M235A00 bus converters are available now in SMT, through-hole and thermally-enhanced VI BRICK package versions.  

Visit Vicor at


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