Radiation Hardened DC-DC Converters for Space Environments

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VPT, a HEICO company (NYSE:HEI.A) (NYSE:HEI), today released its single and dual output SVRSA DC-DC converters to further expand its offering of radiation hardened high reliability space products. Specifically designed for the harsh radiation environment facing space applications, the SVRSA Series has been characterized to Total Ionizing Dose (TID) to 100 krad(Si), including Enhanced Low Dose Rate Sensitivity (ELDRS), and Single Event Effects (SEE) performance to 85 MeV-cm2/mg.

The SVRSA 6W output series offers a wide input voltage range of 18 to 40V, plus 50V transient operation, and is available in single output voltages of 3.3, 5, 12 and 15V and dual output voltages of ±5, ±12 and ±15V. The series topology is an isolated single-output flyback converter featuring VPT´s proprietary radiation immune magnetic feedback technology. Features of the SVRSA Series include input undervoltage lockout, output soft start, current limit and short circuit protection, and is rated for full power operation up to 125° C.

“We´ve leveraged our proven heritage in space product development in the design of the SVRSA Series, which follows our DLA-approved Radiation Hardness Assurance plan and is in accordance with Aerospace TOR requirements,” said Leonard Leslie, Vice President of Engineering for VPT. “This high efficiency hybrid series of DC-DC converters is aligned with programs headed for low Earth orbit or deep space.”

Comprehensive environmental screening for the SVRSA Series is per MIL-STD-883 as referenced in MIL-PRF-38534 including Class H and Class K. The DLA Land and Maritime has officially released the SVRSA Series standard microcircuit drawings (SMDs) under SMD family numbers 5962R15217 for the single output converters and 5962R15218 for the dual output converters.

The SVRSA Series single and dual output DC-DC converters are available for immediate sale. Additional information, mechanical drawings and performance charts can be found within VPT’s space product information on the links below.

VPT, a HEICO company (NYSE:HEI.A) (NYSE:HEI), today released its dual output VXR Series DC-DC converters to augment its offering of advanced high-reliability COTS products. Optimized for a broad range of programs from military ground vehicles to commercial and military aircraft, the VXR Series products feature wide input voltage ranges and advanced packaging technology for superior operation in harsh environments. The VXR Series now includes both single and dual output offerings from 7 Watts to 100 Watts as well as 2 to 20 Amp EMI filters.

The VXR Series dual output DC-DC converters feature two independently controlled and isolated outputs which provide zero cross-regulation. Each output can be configured as positive, negative or stacked allowing for a broad range of output voltage configurations. Additionally, the output voltages can be ordered as unmatched pairs as a standard product option providing a vast range of flexibility within an overall power system design.

“The entire VXR Series of products has a robust mechanical design that is highly efficient over a wide input voltage range including significant input transient capability,” said Jeremy Ferrell, VPT’s Manager of Standard Product Engineering. “Also, the proprietary two-stage topology provides incredibly fast transient response time without the use of optoisolators.”

In addition to high efficiency and high reliability, the VXR Series features its proprietary V-SHIELD® advanced packaging technology. V-SHIELD® is an integral epoxy encapsulation which incorporates EMI shielding and dual-sided thermal conduction. It 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.

An additional update to the VXR Series family of DC-DC converters is the capability of the single output converters to now meet the 100 Volt surge requirement of MIL-STD-1275 as well as DO-160. The 100 Volt surge operation is achieved without adding external components to the converters.

“Programs requiring high reliability and cutting edge performance while potentially operating in harsh, taxing environments are prime candidates for the efficiency and durability of the VXR Series of DC-DC converters and EMI filters,” said Monty Pyle, VP of Sales and Marketing. “The extension of this product family illustrates our commitment to innovation based on proven design heritage.”

The VXR Series single and dual output DC-DC converters and VXR Series EMI filters are available for immediate sale. Additional information on the VXR Series and specific product datasheets can be found within VPT’s COTS product information.

For quotes please contact Vermont Rep.