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1800 series
F
EATURES
•
•
•
•
Single, Dual, Triple Output
DC/DC Converter
0.400 Inch Case Profile
-55
o
C to +85
o
C Ambient Operation
Wide Input Voltage Range
Input Filter Meets Requriements of MIL-STD-461C,
MIL-STD-704D and MIL-STD-1275A
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Meets MIL-STD-202 and MIL-STD-810 Test Conditions
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>600,000 Hours MTBF per MIL-HDBK-217F
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6 sided Continuous Shielding
D
ESCRIPTIONS
The 1800 series of 16W DC/DC converter modules combine innovative design techniques, conservative component selection and
stringent test standards to achieve very high levels of reliability, performance and power density. Per MIL-HDBK-217F, that MTBF
is >600,000 hours (+25
o
C Ground Benign) and greater than 125,000 hours for Airborne Inhabited. The 1800 series has been
designed specifically to meet the rigorous demands of avionics equipment. Eight models have wide 16 VDC to 36 VDC inputs,
centered on 28 VDC. Single, dual or triple output combinations of 5, 12, 15, ±5, ±12 and ±15 VDC are provided. Standard features
include 1000 VDC input/output isolation, output ripple and noise of less than 1% and continuous short circuit protection.
Efficiency is as high as 80%. A remote ON/OFF control input and internal PI filter are standard.
Long field life is insured by extensive reliability screening at Martek Power. All 1800 series units are designed to the require-
ments of MIL-STD-202 and MIL-STD-810. As part of the normal production processing, each unit is subjected to 72 hours of
burn-in with power cycling and load switching. The 1800 series converters have been qualifed and meet MIL-STD-704D
emergency power conditions for aircraft, and MIL-STD-461C and MIL-STD-1275A for EMI and transient protection.
Compliance to the EMI standards of MIL-STD-461C (including CE01 and RE01) is achieved without the need for external filter-
ing components.
Each 1800 model is packaged in a very low profile 2.56 x 3.0 x 0.4 inch metal case. Six-sided continuous shielding insures each
converter meets the requirements of VDE 0871 Class B for radiated emissions. Full operation is specified over the wide
temperature range of -55
o
C to +85
o
C with no derating or heatsinking required. Cooling is by free-air convection.
Martek Power’s 1800 series has been designed to meet the military standards applicable to avionics applications. For specific
information on test methods and/or test levels or our own reliability processing, please contact the factory. Some of the
applicable military standards include:
MIL-STD-810E This standard establishes the methods of testing the effects of natural and induced environments on equipment
used in military applications.
MIL-STD-461C This stnadard sets the design and documentation requirements for controlling the electromagnetic emission
and suseptibility characteristics of electronic equipment.
MIL-STD-202E
This standard outlines the test methods for determining a components’ resistance to the effects of natural
elements and conditions. Typically used on small components such as resistors, capacitors and transformers. Tests numbered
300 thru 399 cover electrial characteristics.
MIL-STD-1275A This standard describes the transient voltage characteristics and steady state limits for 28 VDC powered
circuits used in military vehicle.
MIL-STD-704D
This standard defines the conducted electrial power characteristics for aircraft systems at the interface
between the power system and electronic equipment. It insures the compability of aircraft electric systems and ground support
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