Crane Aerospace & Electronics Power Solutions
sMrt28 singlꢂ, Dꢀꢄl ꢄnd tꢃiplꢂ spꢄꢇꢂ Dc/Dc convꢂꢃꢁꢂꢃꢈ
28 VOLt Iꢆꢅut – 35 Watt – sꢅace quaLIFIeD
convꢂꢃꢈion Fꢃꢂꢉꢀꢂnꢇy
Operating COnditiOns and CharaCteristiCs
•ꢀ 300 kHz typ 270 kHz min, 330 kHz max
Inpꢀꢁ Volꢁꢄgꢂ rꢄngꢂ
rꢄdiꢄꢁion (will opꢂꢃꢄꢁꢂ ꢁhꢃoꢀgh)
•ꢀ 1x1012 neutrons/cm2 neutron or proton fluence
•ꢀ Radiation dose rate 1011 rad(Si) /sec
•ꢀ Total dose up to 300 kRad(Si)
•ꢀ 19 to 56 VDC continuous
•ꢀ 80 V for 100 ms transient
Oꢀꢁpꢀꢁ ꢅowꢂꢃ
•ꢀ Up to 35 watts depending on model
•ꢀ SEE - LET to 80 MeV cm2/mg
Lꢂꢄd soldꢂꢃing tꢂmpꢂꢃꢄꢁꢀꢃꢂ (10 ꢈꢂꢇ pꢂꢃ pin)
•ꢀ 300°C
synC and inhibit
sꢁoꢃꢄgꢂ tꢂmpꢂꢃꢄꢁꢀꢃꢂ rꢄngꢂ (cꢄꢈꢂ)
•ꢀ -65°C to +150°C
synꢇ
•ꢀInput frequency 270-330 kHz
•ꢀ Duty cycle 20% min, 80% max
•ꢀ 2.5 V p-p minimum amplitude
•ꢀ 10 V p-p maximum amplitude
•ꢀ Sync circuit is floating and isolated
•ꢀ If sync is used at lower end of the range, full load
operation is not guaranteed.
cꢄꢈꢂ Opꢂꢃꢄꢁing tꢂmpꢂꢃꢄꢁꢀꢃꢂ (tꢇ)
•ꢀ -55°C to +125°C full power
•ꢀ -55°C to +135°C absolute
Dꢂꢃꢄꢁing Oꢀꢁpꢀꢁ ꢅowꢂꢃ/cꢀꢃꢃꢂnꢁ
•ꢀ Linearly from 100% at 125°C to 0% at 135°C
ꢅowꢂꢃ Diꢈꢈipꢄꢁion (ꢅd)
•ꢀꢀ20ꢀtoꢀ31ꢀW
Inhibiꢁ
•ꢀ Active low (output disabled)
‣IꢀH referenced to input common
‣Active low, pulled to 0.4 V or lower
‣Inhibit pin current < 2mA
•ꢀ Active high (output enabled)
‣High >2.4V
Oꢀꢁpꢀꢁ Volꢁꢄgꢂ tꢂmpꢂꢃꢄꢁꢀꢃꢂ coꢂffiꢇiꢂnꢁ
•ꢀ 100 ppm/°C max
cꢀꢃꢃꢂnꢁ Limiꢁ
•ꢀ 125% of full load typical
Iꢈolꢄꢁion ꢄꢁ 25°c
•ꢀ 100 megohm minimum at 500 V
‣ꢀot to exceed 10V
‣Open pin voltage 5 to 6 volts
aꢀdio rꢂjꢂꢇꢁion
•ꢀ 50 dB typical
meChaniCal and envirOnmental
sizꢂ (mꢄximꢀm)
sꢇꢃꢂꢂning
•ꢀ2.705 x 2.205 x 0.400 inches (68.71 x 56.01 x 10.16 mm)
‣See case S for dimensions.
Space Prototype, Class H, or Class K are radiation tolerant
to Radiation Hardness Assurance (RHA) levels of “-” (O), “P”,
“R”, or “F” per MIL-PRF-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”.
Wꢂighꢁ (mꢄximꢀm)
•ꢀ 100 grams maximum
See Screening Tables 1, 2 and 3 for more information. Available
configurations: OO, HP, HR, KP, KR, KF
www.interpoint.com
Page 3 of 19
SMRT28 Rev E - 20100216
CRANE [ Crane Aerospace & Electronics. ]
