Crane Aerospace & Electronics Power Solutions
sMrt28 singlꢂ, Dꢀꢄl ꢄnd tꢃiplꢂ spꢄꢇꢂ Dc/Dc convꢂꢃꢁꢂꢃꢈ
28 VOLt Iꢆꢅut – 35 Watt – sꢅace quaLIFIeD
Features
Bꢀilꢁ in MIL-stD-461 eMI filꢁꢂꢃ
Oꢀꢁpꢀꢁ ꢁꢃim fꢃom 51% ꢁo 124% of nominꢄl
•ꢀ Operating temperature -55° to +125°C
•ꢀ Qualified to MIL-PRF-38534 Class H and K
•ꢀ Radiation hardness assurance (RHA) to
level F 300 kRad(Si)
•ꢀ Input voltage range 19 to 56 VDC
•ꢀ Transient protection 80 V for 120 ms
•ꢀ Fully isolated, 5 port isolation
•ꢀ Dual magnetic feedback
•ꢀ Fixed high frequency switching
•ꢀ Remote sense
•ꢀ Inhibit function
•ꢀ Synchronization input
MODELS
VDC Ou t p u t
•ꢀ Indefinite short circuit protection
•ꢀ Radiation tolerant to
SIꢀꢁLE
3.3
5
DUAL
±5
±12
±15
- 1 x 1012 protons/cm2 neutron or proton fluence
- 1011 rad(Si)/sec dose rate
8.7
12
15
- 3 x 105 rad(Si) total dose
- SEE - LET to 80 MeV cm2/mg
TRIPLE
+3.3 & ±12
+3.3 & ±15
+5 & ±7
•ꢀ Meets MIL-STD-704A transient standards
+5 & ±12
+5 & ±15
DescrIꢅtIOꢆ
Two independent feedback loops are used to regulate the dual
and triple outputs, one feedback loop regulates the two-phased
single output. Each set of outputs is electrically isolated from the
other and from the input. This product configuration eliminates
cross regulation effects between output sets.
The SMRT28 Series™ of DC/DC converters offers up to 35
watts of power in a radiation tolerant design. The low profile
SMRT28 converters are manufactured in Interpoint’s fully
certified and qualified MIL-PRF-38534 production facility and
packaged in hermetically sealed steel cases. They are ideal for
use in programs requiring high reliability, small size, and high
levels of radiation hardening assurance.
Configurations:
•ꢀSingleꢀOutput:ꢀOneꢀtwo-phaseꢀsingleꢀoutput
•ꢀDualꢀOutput:ꢀTwoꢀsingle-phaseꢀsingleꢀoutputs
•ꢀTripleꢀOutput:ꢀOneꢀsingle-phaseꢀindependentꢀ
Main output and one single-phase dual output.
(± Auxiliary output)
The SMRT28 converters are switching regulators which use a
two-phase, phase shifted flyback design with a nominal switching
frequency of 300 kHz. Close regulation is maintained with
advanced constant frequency pulse width modulation design
techniques. The SMRT28’s feed-forward compensation and
discontinuous topologies provide high levels (80 dB peak) of
input-to-output ripple rejection.
Crane Aerospace & Electronics
Crane Electronics, Inc.
Page 1 of 22
SMRT28 Rev F - 2011.01.24
Power Solutions – Interpoint
POꢀBoxꢀ97005ꢀꢀ•ꢀꢀRedmondꢀWAꢀ98073-9705
425.882.3100ꢀꢀꢀ•ꢀꢀpower@crane-eg.com
www.craneae.com/interpoint
Cleared by the U.S. Department of Defense (DoD) Office of Security Review (OSR)
for public release. OSR case number 11-S-0729, dated January 4, 2011.