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Filter prevents spikes

Tuesday, 11 September, 2007

On Stand 2090 XP Power is highlighting availability of its new 500W active filter unit for use in harsh electrical environments. Designated the DSF500, this is designed to protect dc-dc converters from the surges, spikes and ripples typically found on the electrical system of any military platform, such as an aircraft or vehicle.

The filter meets MIL-STD 1275A-D, without the need to incorporate additional components and platformmounted systems can utilise standard industrial dc-dc converters without the risk of failure or damage due to supply transients and noise. Input voltage is within the range 10–34V DC, while output voltage is tracked and clamped to below 36V DC.

The DSF500’s low-loss, MOSFET-based protection circuit ensures the unit provides continuous reverse voltage protection. Moreover, attached systems are protected from incorrect, potentially damaging, electrical supply connections. Should the demand exceed 28A, a warning signal is given that can be used to disable the DSF500 or turn off the attached devices to reduce the current. Measuring 57.90 x 57.90 x 16.45mm, the unit is believed to be the smallest active filter available that meets MIL-STD 1275A-D and can deliver 28A.