Converters meet design needs of satellite power systems

1st July 2014
Staff Reporter

International Rectifier has introduced the D Series of low power radiation-tolerant two output DC-DC converters developed to meet the high reliability design needs of satellite power systems. The new D28xxD and D50xxxxP D Series of DC-DC converters offer extremely low output noise, guaranteed End-of-Life (EOL) output voltage drift with excellent output cross regulation. Each converter output is independently regulated with 5W maximum rated output power or 10W total output power. 

Available in two output configurations, the first configuration offers the traditional positive and negative output combination for analog and linear circuit loads. The second configuration features two positive outputs where each output may have the same or different voltages with each voltage as low as 1V and as high as 5V. This version is well suited to DSP, FPGA, DDR memory and other digital loads. Each converter output is independently regulated with 5W maximum rated output power or 10W total output power. Following IR’s design standards, the D series are designed to meet MIL-STD-1547B and NASA’s EEE-INST-002, the industry’s de-rating standards for EEE components stress de-rating.

The D Series DC-DC converters incorporate IR’s proprietary PWM controller IC which integrates several performance enhancing circuitries to minimize overall component count and improve reliability. Linear post regulation based on proprietary design is used for both outputs for low noise and high audio rejection. With a low weight of < 55 grams, the new converters are characterized with total ionizing dose (TID) of greater than 50K Rad(Si), and single event effect (SEE) linear energy transfer (LET) of heavy ions greater than 40 MeV.cm2 /mg.

Design analysis reports which include reliability analysis, components stress analysis, thermal analysis, radiation tests, and worst case analysis are available upon request. This product is subject to U.S. export control laws and regulations.

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