MHV283R3S_15 Datasheet, PDF (1/21 Pages) Interpoint Corporation Company – MHV Single, Dual and Triple DC-DC Converters

Crane Aerospace & Electronics Power Solutions
MHV Single, Dual and Triple DC-DC Converters
28 Volt input – 15 Watt
Features
No cross regulation on dual outputs
• Operating temperature -55°C to +125°C
• Input voltage range 16 to 50 volts
• Transient protection 80 V for 120 ms
-- 12 V_out single and dual to 75 volts
-- 15 V_out single and dual to 60 volts
• Fully isolated
• Fixed frequency switching
• Output trim on single output models
• Inhibit and sync functions
• Undervoltage lockout
models
Output Voltage (V)
SINGLE DUAL TRIPLE
3.3
±5 +5 & ±12
5
±12 +5 & ±15
12
±15
15
description
The Interpoint^® MHV Series™ of dc-dc converters offers a
wide input voltage range of 16 to 50 volts 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.
Converter Design
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 operation.
Each of the PWMs operates at approximately one-half (300 kHz)
of the clock frequency. This proprietary technology minimizes
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.
Inhibit Function
The converter is enabled when the inhibit terminal is left
unconnected. When the inhibit terminal is pulled low (<0.8 V)
the converter shuts down, typically drawing 8.4 mA at 28 V_in or
15 mA at 50 V_in. Sinking current required is V_in / 3.3 k ohm. For
more information see Table 7 on page 7.
Synchronization Function
Applying an external signal of 40% to 60% duty cycle and 490
to 710 kHz for single and dual 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. See Table 7 on page 7
Trim
Single output converters feature a trim range of as low as 80% to
as high as 110% of V_out nominal, depending on the model. To
trim up, connect a resistor from Output Common (pin 4) to Trim
(pin 3). To trim down, connect a resistor from the Positive Output
(pin 5) to Trim (pin 3). For more information see Table 1, Table 2
and Figure 6 on page 4.
Screening
The converters are offered with standard screening, “ES”
screening, or fully compliant to “883” MIL-PRF-38534 Class H
screening. See Table 13 on page 20 and Table 14 on page
21. Standard microcircuit drawings (SMD) are available. See
Table 5 on page 6.
Crane Aerospace & Electronics
Power Solutions - Interpoint Products
10301 Willows Road NE, Redmond, WA, 98052
+1.425.882.3100 • [e-mail]
www.craneae.com/interpoint
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MHV Rev AC - 2015.01.23