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MHV2805D Operating temperature -55° to +125°C Input voltage range 16 to 50 VDC
型号:   MHV2805D
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描述:   Operating temperature -55° to +125°C Input voltage range 16 to 50 VDC
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品牌   INTERPOINT [ INTERPOINT CORPORATION COMPANY ]
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Crane Aerospace & Electronics Power Solutions
MHV single, dual and triple dc/dc converters
28 Volt input – 15 Watt
Features
• Operating temperature -55° to +125°C
• Input voltage range 16 to 50 VDC
- 12 Vout single and dual to 75 V
- 15 Vout single and dual to 60 V
vDC o
utput
single
no cross regulation on dual outputs
• Transient protection 80 V for 120 ms
• Fully isolated
• Fixed frequency switching
• Inhibit and sync functions
MODELS
D
ual
±5
±12
±15
• Output trim on single output models
• High power density, up to 83% efficiency
3.3
5
12
15
+5 & ±12
+5 & ±15
triple
description
Interpoint’s MHV Series™ of DC/DC converters offers a wide
input voltage range of 16 to 50 VDC and a choice of nine
different output voltage configurations comprised of single, dual
or triple outputs. The 3.3 volt single, 5 volt single and dual and
the triple output models will withstand transients of up to 80 volts
for up to 120 milliseconds while maintaining output voltages.
The 12 volt single and dual outputs will withstand transients up
to 75 volts and the 15 volt single and dual outputs will withstand
up to 60 volts for 120 milliseconds. The MHV Series operates at
15 watts of output power (10 watts for the 3.3 volt single output)
over the military temperature range of -55°C to +125°C while
maintaining low input and output noise.
i
nhibit
F
unCtion
The converter is enabled when the inhibit terminal is left uncon-
nected. When the inhibit terminal is pulled low (<0.8 V) the
converter shuts down, typically drawing 8.4 mA at 28 Vin or 15
mA at 50 Vin. Sinking current required is Vin / 3.3 K ohm.
s
ynChronization
F
unCtion
C
onverter
D
esign
Applying an external signal of 40% to 60% duty cycle and 490
to 710 kHz for singles and duals output models will synchronize
the converter to your system requirements. For triple output
models the external frequency range is 500 to 700 kHz. Free run
clock frequency is approximately 600 kHz. If not used, the sync
terminal must be left unconnected.
MHV Series DC/DC converters are switching regulators that use
continuous flyback conversion topology with a clock frequency
of approximately 600 kHz. MHV Series converters incorporate
two pulse width modulators (PWM) with one PWM phase shifted
180° from the other to create a dual phase/phase-shifted opera-
tion. Each of the PWMs operates at approximately one-half (300
kHz) of the clock frequency. This proprietary technology mini-
mizes input ripple and improves efficiency. On singles the output
ripple is reduced. Cross regulation is eliminated on dual output
models which are independently regulated and do not require
load balancing or minimum loading. On triple output models, this
design provides completely independent regulation with no cross
regulation effect between the main and auxiliary outputs and no
minimum loading is required on the main output.
t
rim
Single output converters feature a trim range of as low as 80%
to as high as 110% of Vout nominal, depending on the model.
To trim up, connect a resistor from output common (pin 4) to the
trim terminal (pin 3). To trim down, connect a resistor from the
positive output (pin 5) to the trim terminal (pin 3). See Figure 4
and trim tables for more information.
s
Creening
The converters are offered with standard screening, “ES”
screening, or fully compliant to “883” MIL-PRF-38534 Class H
screening. Standard microcircuit drawings (SMD) are available.
Crane Aerospace & Electronics
Electronics Group (Interpoint Brand)
PO Box 97005 • Redmond WA 98073-9705
425.882.3100 • power@crane-eg.com
www.interpoint.com
Page 1 of 19
MHV Rev E - 20100503
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