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DC/DC converter designed for spacecraft apps

Posted: 07 Jul 2011     Print Version  Bookmark and Share

Keywords:FPGA  RAD-Hard  DC-DC converter  spacecraft applications 

International Rectifier (IR) introduces the GH Series of 50W, radiation hardened (RAD-Hard) DC-DC converters designed to maximise efficiency for on-board spacecraft applications requiring long mission life up to 15 years.

 GH Series DC-DC converters

The GH series is aimed at designs using digital signal processors and FPGA technologies that require a supply voltage as low as 1V. Key features include 18V to 40V input range, total ionisation dose (TID) of over 100krad (Si), single event effect (SEE) (Heavy Ions) with rated LET greater than 82MeV.cm�/mg, internal EMI filter complying with most major satellite power buses, and a weight of less than 110g.

"As a low output voltage, highly efficient solution, the GH Series addresses the on-going need to reduce the overall size and weight of the system together with the increasing requirements of FPGA and other digital circuitries for increased bandwidth and data processing speed of spacecraft electronics," said Tiva Bussarakons, marketing director for IR's HiRel DC-DC Converter Products.

The GH Series is said to have been developed using a proven space-level design methodology that includes selection of established reliable components and fully de-rated to the requirements of MIL-STD-1547. The devices feature magnetically coupled feedback to insure robust operation under the intended radiation environments.

The output models range from 1V to 5V with current rating of up to 20A and high efficiency up to 87 per cent. Output is adjustable with an external resistor for a precise output voltage setting with the adjustment range of ±10 per cent of the rated output voltage. Other key features include remote sense compensation, remote output on/off control via Inhibit pin, input under-voltage protection with under-voltage lockout (UVLO), and synchronisation for applications with multiple converters.

Pricing for the GH2803R3S begins at Rs.7.81 lakh ($17,500) each for 5-10 unit quantities. Production orders are available immediately. Prices are subject to change. This product is subject to U.S. export control laws and regulations.





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