Operating COnditiOns and CharaCteristiCs
input Voltage range
19 to 40 VDC continuous
80 V for 50 msec transient
output power
up to 100 watts depending on model
lead soldering temperature (10 sec per lead)
300°C
storage temperature range (case)
-65°C to +150°C
power dissipation (pd)
20 watts
case operating temperature (tc)
-55°C to +125°C full power
-55°C to +135°C absolute
derating output power/current
Linearly from 100% at 125°C to 0% at 135°C
output Voltage temperature coefficient
100 ppm/°C typical
input to output capacitance
150 pF typical
isolation
100 megohm minimum at 500 VDC, any pin to case
audio rejection
50 dB typical
conversion Frequency
Free run mode 600 kHz typical
550 kHz min, 650 kHz. max
External sync range 525 to 675 kHz
meChaniCal and envirOnmental
size (maximum)
3.005 x 1.505 x 0.400 inches (76.33 x 38.23 x 10.16 mm).
Case u has short, straight leads. Case V has longer leads
which are bent down.
Weight (maximum)
86 grams
screening
Space Prototype (O), Class H, or Class K Radiation tolerant
to Radiation Hardness Assurance (RHA) levels of “-” (O), “P”
or “R”, 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”.
Available configurations: OO, HP, KP, HR, KR
See Screening Tables 1 and 2 for more information.
synC and inhibit (inh1, inh2)
sync
Sync In
Input frequency 525 to 675 Hz.
Duty cycle 40% min, 60% max
Active low 0.8 V max
Active high 4.5 V min, 5 V max
Referenced to input common
Sync Out
Referenced to input common
inhibit: inH1 and inH2
(do not apply a voltage to the inhibit pin)
Converter Disabled (active low)
INH1 referenced to input common
Pull voltage to 0.8 V or below by connecting
-
to ground or other method.
Inhibit pin source current, 10 mA max
-
INH2 referenced to output common
Pull voltage to 0.5 V or below by connecting
-
to ground or other method.
Inhibit pin source current 5 mA max
-
Converter Enabled (active high)
Inhibit pin open or through an open collector
Open pin voltage
INH1 = 9 to 12 V
-
INH2 = 9 V max
-
Note that synchronizing the units together (though shown in the
figure) is not required for current sharing operation. A second
slave unit may be placed in parallel with a master and slave; this
requires the TRI pin (pin 3) of the master unit to be connected to
the SNS RTN pin (pin 9).
Whenparalleled,upto95%ofthetotalcombinedpowerratings
of the SMFLHP converters is available at the load. Overload
and short circuit performance are not adversely affected during
parallel operation.
Crane Aerospace & Electronics Power Solutions
www.craneae.com/interpoint
Page 2 of 14
smFlHp single and dual dc/dc converters
28 Volt input – 100 Watt
Rev J - 2011.05.04