Crane Aerospace & Electronics Power Solutions
SMTR Single, Dꢀꢁl ꢁnd Triple DC/DC Converters
28 VOꢂT INPuT – 30 WaTT – PENDINꢃ REVISION F REꢂEaSE
OPERaTINꢃ CONDITIONS aND ChaRaCTERISTICS
aꢀdio Rejection
Inpꢀt Voltꢁge Rꢁnge
•ꢀ 40 dB typ (50 dB typ, triple output)
•ꢀ 16 to 40 VDC continuous
•ꢀ 50 V for 50 msec transient
Conversion Freqꢀencꢄ
•ꢀ Free run 550 min, 600 typ, 650 max kHz
•ꢀ External sync 500 to 675 kHz
Oꢀtpꢀt Power
•ꢀ Up to 30 watts depending on model
ꢂeꢁd Soldering Temperꢁtꢀre (10 sec per pin)
•ꢀ 300°C
SyNC aND INhIbIT
Storꢁge Temperꢁtꢀre Rꢁnge (Cꢁse)
•ꢀ -65°C to +135°C
Sꢄnc
•ꢀInput frequency 500 to 675 kHz
•ꢀ Duty cycle 40% min, 60% max
•ꢀ Active low 0.8 V max
Cꢁse Operꢁting Temperꢁtꢀre (Tc)
•ꢀ -55°C to +125°C full power
•ꢀ -55°C to +135°C absolute
•ꢀ Active high 4.5 V min, 5 V max
•ꢀ Referenced to input common
•ꢀ If not used, connect to input common
Derꢁting Oꢀtpꢀt Power/Cꢀrrent
•ꢀ Linearly from 100% at 125°C to 0% at 135°C
Oꢀtpꢀt Voltꢁge Temperꢁtꢀre Coefficient
•ꢀ 100 ppm/°C typical single and dual outputs
•ꢀ 200 ppm/°C main, 300 ppm/°C aux triple output
Inꢅiꢆit
•ꢀ Active low (output disabled)
‣ Voltageꢀ≤0.8ꢀV
Inpꢀt to Oꢀtpꢀt Cꢁpꢁcitꢁnce
•ꢀ 50 pF typ (100 pF typ triple outputs)
‣ Inhibit pin source current 8.0 mA max
‣Referenced to input common
•ꢀ Active high (output enabled)
‣Open collector or unconnected
‣If not used, leave unconnected
‣Inhibit pin voltage, 9 to 11 V
Cꢀrrent ꢂimit
•ꢀ 125% of full load typical
Isolꢁtion
•ꢀ 100 megohm minimum at 500 VDC
•ꢀ Any pin to case, except case pin
MEChaNICaꢂ aND ENVIRONMENTaꢂ
Size (mꢁximꢀm)
•ꢀ Single and dual output
Screening
Space Prototype (O), Class H, or Class K are radiation tolerant
to Radiation Hardness Assurance (RHA) levels of “-” (O), “P”
or “R”, per MIL-STD-38534. Interpoint model numbers use an
“O” in the RHA designator position to indicate the “-” (dash)
Radiation hardness Assurance level of MIL-PRF- 38534, which
is defined as “no RHA”.
‣ ꢀon-flanged: 2.125 x 1.115 x 0.400 inches
(53.98 x 28.58 x 10.16 mm) See case H2 for dimensions.
‣ Flanged: 2.910 x 1.115 x 0.400 inches
(73.79 x 28.58 x 10.16 mm) See case K3 for dimensions.
•ꢀ Triple output
‣ ꢀon-flanged: 1.950 x 1.350 x 0.405 inches
(49.53 x 34.29 x 10.29 mm) See case F1 for dimensions.
‣ Flanged: 2.720 x 1.350 x 0.405 inches
(69.09 x 34.29 x 10.29 mm) See case J1 for dimensions.
See “Class H and K, MIL-PRF-38534 Screening” tables for more
information, page 21. Available configurations are: OO, HP, KP,
HR, and KR
Weigꢅt (mꢁximꢀm)
•ꢀ Single and dual non-flanged 50 grams, flanged 52 grams
•ꢀ Triple non-flanged 58 grams, flanged 62 grams
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Page 3 of 21
Rev F - 20090324 - Pending Revision F Release
CRANE [ Crane Aerospace & Electronics. ]
