Industrial Environment
DC-DC Converters <40 Watt
IMS 7 Series
Edition 5/9.99
1/15
MELCHER
The Power Partners.
7 Watt DC-DC Converters
IMS 7 Series
Input to output electric strength test 1500 V DC
Input voltage ranges: 14...36 V DC and 36...75 V DC
Single and double outputs of 3.3, 5, 12, 15, 24 V DC
Wide input voltage ranges
Electrical isolation, single and double output units
High efficiency (typ. 84%)
Emissions below EN 55 022 level B
Immunity to IEC/EN 61000-4-2, -3, -4, -5 and -6
Inhibit input, output voltage adjustable
Flex power: Flexible load distribution
No load and short-circuit proof
Operating ambient temperature range –25...71
°C
High reliability and no derating
2"
× 1" case with 10.5 mm profile
Supplementary insulation
Safety according to IECEN 60950, UL 1950
LGA
C
Summary
The IMS 7 series of board mountable 7 Watt DC-DC con-
verters has been designed according to the latest industry
requirements and standards. The converters are particu-
larly suitable for use in industry or telecommunications
where variable input voltages or high transient voltages are
prevalent.
Providing two wide input voltage ranges, 14...36 V DC and
36...75 V DC, the units are available with single and electri-
cally isolated double outputs allowing the configuration of
output voltages from 3.3 up to 48 V DC externally adjust-
able, with flexible load distribution on double output units.
An inhibit input allows remote converter on/off.
Features include efficient input and output filtering with un-
surpassed transient and surge protection, low output ripple
and noise, consistently high efficiency over the entire input
voltage range, high reliability as well as excellent dynamic
response to load and line changes.
The converters provide supplementary insulation with
SELV outputs as e.g. required in battery supported systems
where the bus voltage may exceed the SELV limit of
60 V DC. They are designed and built according to the in-
ternational safety standards IEC/EN 60950, UL 1950, CAN/
CSA C22.2 No. 950-95 and are LGA and UL marked.
A special feature is their small case size, 2"
× 1" with
10.5 mm profile.
The circuit comprises of integrated planar magnetics and
all components are automatically assembled and solidly
soldered onto a single PCB without any wire connections.
Magnetic feedback ensures maximum reliability and
repeatability in the control loop over all operating condi-
tions. Careful considerations of possible thermal stresses
ensure the absence of hot spots providing long life in envi-
ronments where temperature cycles are a reality. The ther-
mal design allows operation at full load up to an ambient
temperature of 71
°C in free air without using any potting
material. For extremely high vibration environments the
case has holes for screw mounting.
Optionally the IMS 7 series is available with the industrial
C pinout or with an SMD pinout.
50.8
2.0"
25.4
1.0"
10.5
0.42"
Table of Contents
Page
Summary .......................................................................... 1
Type Survey and Key Data .............................................. 2
Type Key .......................................................................... 2
Functional Description ...................................................... 3
Electrical Input Data ......................................................... 4
Electrical Output Data ...................................................... 6
Auxiliary Functions ........................................................... 8
Page
Electromagnetic Compatibility (EMC) ............................ 10
Immunity to Environmental Conditions ........................... 11
Mechanical Data ............................................................ 12
Safety and Installation Instructions ................................ 13
Description of Options .................................................... 15
Accessories .................................................................... 15