High-reliability DC-DC converters and EMI filters for demanding applications

Latest from VPT is the new VXR Series of DC-DC converters and EMI Filters - the most advanced offering in its extensive line of high-reliability COTS DC-DC converters and accessory products, says the company. Available in models ranging from 7W to 100W with an industry leading wide continuous input voltage range from 9VDC to 60VDC and transient operation from 6VDC to 80VDC, the VXR Series is optimised for a broad range of applications from defence ground vehicles to commercial and defence aircraft, including the unique power needs of un-manned aerial and ground systems. The VXR Series utilises VPT's patent-pending advanced packaging technology. This proprietary encapsulation process incorporates EMI shielding and dual-sided thermal conduction. The integral epoxy encapsulated packaging is highly resistant to chemical, solvent and salt environments and is fully compatible with high-volume manufacturing processes including wave solder, cleaning solvents, high-pressure sprays and aqueous wash. "The VXR Series of products is reliability and efficiency focused, utilising a low-noise, fixed frequency wide input voltage range topology," said Jeremy Ferrell, VPT's manager of standard product engineering. "We achieved this high efficiency over a wide input voltage range with a proprietary precision-controlled synchronous rectification topology. The high efficiency design in-turn reduces the thermal management requirements. We also incorporated a proprietary control loop design that provides a fast transient response without the use of optoisolators. For customers with noise-sensitive applications, we developed the VXR EMI Filter Series with current ratings from 2A to 20A that were specifically designed to meet specific MIL-STD-461 and DO-160 conditions when used with our VXR Series DC-DC converters."