MR2011S Datasheet, PDF (3/4 Pages) MicroPower Direct, LLC – Ultra-Wide Input, 20W Compact, Railway DC/DC Converters

EMC Specifications
Parameter
Transient Input Voltage See Note 1
Standard
RIA 12
Maximum Input Voltage See Note 1
EN 50155
Radiated Emissions
Conducted Emissions
ESD
See Note 2
EN 55022
See Note 2
EN 55022
EN 61000-4-2
RS
EN 61000-4-3
EFT
See Note 3 EN 61000-4-4
Surge
CS
Voltage Dips
See Note 4 EN 61000-4-5
EN 61000-4-6
EN 61000-4-29
Typical Connection
Criteria
A
B
B
B
A
B
B
A
B
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Specification
385V/20 mS
1,800V (5/50 µS, 50 or 100⍀
8,400V (0.05/0.1 µS, 100⍀
Class B
Class B
±4 kV Contact
10V/m
±4 kV
±2 kV/±4 kV
3 Vrms
0% - 70%
Notes:
1. With a pulse interval that is >60S. Requires the addition of the filter module
MDCFM-40U (or a similar discrete circuit) as shown in the circuit/board
layout diagrams below. Contact the factory for more information.
2. All units will meet class B with the addition of the filter module MDCFM-40U
(or a similar discrete circuit) as shown in the circuit/board layout diagrams
below. Contact the factory for more information.
3. To meet the requirements of EN 61000-4-4 (±4 kV), external components are
needed. This can be done discretely, or with the addition of the MDCFM-40U.
Contact the factory for more information.
4. To meet the requirements of EN 61000-4-5 (±2 kV/ ±4 kV ),external components
are needed. This can be done discretely, or with the addition of the MDCFM-40U.
Contact the factory for more information.
The diagram above illustrates a typical connection of the MR2011S series.The
MDCFM-40U filter module is used to make the circuit compliant with input
surge and EMC standards EN 55022, EN 61000 and EN 50155. This can also be
accomplished by using external filter components as shown in the board layout
drawing below. Some notes on these components are:
1. It is recommended that an external fuse be used. The recommended fuse is
shown in the model chart on page 2.
2. An external MOV is recommended on the input to protect the unit in the event
of a surge. A recommended value is given in the table at right.
3. An external TVS is recommended on the input to protect the unit in the event
of a voltage spike. A recommended value is given in the table at right.
4. The output filtering capacitor (C3) is a high frequency,low resistance electrolytic
capacitor. Care must be taken in choosing this capacitor not to exceed the
capacitive load specification for the unit.Voltage derating of capacitors should
be 80% or above.
5. Suggested component values are:
mended. A typical board layout with this module is shown in the figure
Component
MOV
Value
S14K35
below. For pricing or full technical information on these modules please
contact the factory.
7. In many applications,
L1
56 µH
simply adding input/out- Vin Input Vout Output
TVS
SMCJ170
put capacitors will en- (VDC) Capacitor (VDC) Capacitor
C1
C3
L2
CY1, CY2
100 µF/200V
1.0 µF/50V
4.7 µH
1,000 pF/2 kV
hance the input surge
5.0 470 µF
protection & and reduce
output ripple sufficiently. 110
In this case, capacitors
100 µF
12
15
220 µF
220 µF
C1 and C3 would be
24 100 µF
6. Input noise and surge suppression modules are available for a
number of MPD DC/DC power supplies. For use with the MRxxS
connected as shown, without the other filter components. Recom-
mended capacitor values are given in the table above.
product series, the MDCFM-40U DC filter module is recom-
Typical Board Layout: With External Filter/Surge Components
Typical Board Layout: With External Filter Module
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