SMFL2805D INTERPOINT [Interpoint Corporation Company], SMFL2805D Datasheet - Page 2

• Manufacturer Part Number: SMFL2805D
• Manufacturer: INTERPOINT [Interpoint Corporation Company]

sharing mode, one SMFL converter is designated as a master.
The SLAVe pin (pin 11) of the master is left unconnected and the
MSTR/INH2 pin (pin 12) of the master is connected to the SLAVe
pin (pin 11) of the slave units. The units designated as slaves
have the MSTR/INH2 pin (pin 12) connected to the SNS RTN pin
(pin 9). Note that synchronizing the units together is not required
for current sharing operation.
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Operating COnditiOns and CharaCteristiCs
input Voltage range
output power
Lead soldering temperature (10 sec per lead)
storage temperature range (case)
power dissipation (pd)
case operating temperature (tc)
derating output power/current
output Voltage temperature coefficient
input to output capacitance
current Limit
isolation
meChaniCal and envirOnmental
size (maximum)
Weight (maximum)
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16 to 40 VDC continuous
50 V for 120 ms transient
40 to 65 watts depending on model
300°C
-65°C to +150°C
14 watts (16 watts SMFL2805S, SMFL2805D)
MFL283R3S: linearly from 100% at 100°C
100 ppm/°C typical
150 pF, typical
125% of full load typical
100 megohm minimum at 500 V
-55°C to +125°C full power
Linearly from 100% at 125°C to 0% at 135°C
to 85% at 125°C to 0% at 135°C
3.005 x 1.505 x 0.400 inches (76.33 x 38.23 x 10.16 mm
See case u for dimensions.
Case option V is also available.
86 grams
sMFL single and dual dc/dc converters
28 VoLt input – 65 Watt
SMFL Rev K - 20101209
Page 2 of 15
audio rejection
conversion Frequency (-55°c to 125°c)
synC and inhibit (inh1, inh2)
sync
inhibit (inH1, inH2)
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). See Figure 2 for a block
diagram of parallel connections.
When paralleled, 76% of the total combined power ratings of the
SMFL converters are available at the load. Overload and short
circuit performance are not adversely affected during parallel
operation.
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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”.
See Screening Tables 1 - 3 for more information. Available
configurations: OO, HP, KP, HR, KR
50 dB typical
Sync In
Sync Out
Active low (output disabled)
Active high (output enabled)
Free run mode 600 kHz typical
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525 kHz. min, 675 kHz max
Input frequency 525 to 675 Hz.
Duty cycle 40% min, 60% max
Logic low 0.8 V max
Logic high 4.5 V min, 5 V max
Referenced to input common
Referenced to input common
INH1 referenced to input common
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INH2 referenced to output common
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Open collector (output enabled)
Avoid intermediate voltages of 1.5 to 10.5
Open pin voltage
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Active low 0.8 V max
Inhibit pin current 10 mA max
Active low 0.5 V max
Inhibit pin current 5 mA max
INH1 = 9 to 12 V
INH2 = 9 V max
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