description

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.

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.

The converter is enabled when the inhibit terminal is left

unconnected. When the inhibit terminal is pulled low (<0.8 V)

more information see Table 7 on page 7.

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

Single output converters feature a trim range of as low as 80% 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.

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.

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

• Fully isolated

• Fixed frequency switching

• Output trim on single output models

• Inhibit and sync functions

• undervoltage lockout

models

SInGLE

DuAL

TRIPLE

3.3

±5

+5 & ±12

5

±12

+5 & ±15

12

±15

15

Crane Aerospace & Electronics Power Solutions

mHV single, dual and triple dc-dc converters

Crane Aerospace & Electronics

Power Solutions - Interpoint Products

10301 Willows Road NE, Redmond, WA, 98052

+1.425.882.3100 • power@crane-eg.com

www.craneae.com/interpoint

Page 1 of 21

MHV Rev AC - 2015.01.23

28 Volt input – 15 Watt