OPerating COnditiOns and CharaCteristiCs
Input Voltage Range
Single and dual models:
16 to 40 vdC continuous
MHF+281r9S 20 to 32 dC continuous
50 v for up to 50 ms transient
MHF+281r9S 35 v for up to 50 ms transient
triple models:
16 to 48 vdC continuous
80 v for up to 120 ms transient
Output Power
6.65 to 15 watts depending on model
Power Dissipation (Pd)
Single and dual models: 6 watts
1.9 and 3.3v single: 8 watts
triple models: 12 watts triple
Lead Soldering Temperature (10 sec per pin)
300°C
Storage Temperature Range (Case)
-65°C to +150°C
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
150 ppm/°C maximum
Input to Output Capacitance
60 pF typical
Current Limit
Single and dual models: 115% of full load typical
triple models: 130% of full load typical triple
Isolation
100 megohm minimum at 500 v
Audio Rejection
50 dB typical
Conversion Frequency (-55°C to +125°C TC)
Free run
Single and dual models: 480 kHz min, 550 kHz typ,
620 kHz max
triple models: 375 kHz min, 500 kHz max
Undervoltage Lockout
Single and dual models: 14 v input typical
triple models: 8.5 v input typical
synC and inhibit
Sync In
input frequency
Single and dual models: 500 to 600 kHz
triple models: 400 to 600 kHz
duty cycle 40% to 60%
active low 0.8 v max
active high 4 v min, 5 v max
triple models: source impedance should be <100 ohms and
the transition time should be <100 nanoseconds
if sync is not used
Single and dual models: connect to input common
triple models: leave unconnected
referenced to input common
Inhibit:
active low (output disabled)
Active low voltage ≤0.8 V max
inhibit pin current
-
Single and dual models: 4.0 ma max, 3.0 ma typ
triple models: 5.0 ma max, 3.0 ma typ
referenced to input common
active high (output enabled)
Single and dual models
open collector or unconnected
-
open pin 8.5 to 12 v, 10 v typical
-
triple models
open collector or unconnected
-
open collector interface not required if active high is
-
greater than 11 v and less than 40v
open pin voltage, 11 v typical
-
meChaniCal and envirOnmental
Size (maximum)
non flanged 1.460 x 1.130 x 0.330 (37.08 x 28.70 x 8.38 mm)
Flanged 2.005 x 1.130 x 0.330 (50.93 x 28.70 x 8.38 mm)
See cases e1, e2, g1 and g2 for dimensions.
Weight, flanged or unflanged (maximum)
Single and dual models: 30 grams
triple models: 35 grams
Screening:
Standard, eS or 883 (Class H). See Screening tables 1 and 2 for
more information.
www.interpoint.com
Page 3 of 23
Crane aerospace & electronics Power solutions
MHF+ Single, dual and triple dC/dC Converters
28 VOlT inPuT – 15 WATT
MHF+ rev l - 20091113