MR75-72S05RW Datasheet, PDF (2/4 Pages) MicroPower Direct, LLC – Compact, 75W Wide Input Railway DC/DC Converter

Model Selection Guide
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Model
Number
MR75-72S05RW
MR75-72S12RW
MR75-72S15RW
MR75-72S24RW
MR75-110S05RW
MR75-110S12RW
MR75-110S15RW
MR75-110S24RW
Input
Voltage (VDC)
Current (mA)
Nominal Range Full-Load No-Load
72
43 - 101 1,170
50
72
43 - 101 1,132
45
72
43 - 101 1,132
45
72
43 - 101 1,145
55
110 66 - 160
766
40
110 66 - 160
749
35
110 66 - 160
749
35
110 66 - 160
758
50
Output
Voltage Current
(VDC)
(A)
5.0 15.000
12.0 6.250
15.0 5.000
24.0 3.125
5.0 15.000
12.0 6.250
15.0 5.000
24.0 3.125
Reflected
Ripple
Current
(mA Typ)
35
35
35
35
35
35
35
35
Over
Voltage
Protection
(VDC)
Capacitive
Load
(µF, Max)
6.2
25,500
15
4,400
18
2,800
27
1,100
6.2
25,500
15
4,400
18
2,800
27
1,100
Efficiency
(%, Typ)
89
92
92
91
89
91
91
90
Fuse
Rating
Slow-Blow
(mA)
3,200
3,200
3,200
3,200
2,100
2,100
2,100
2,100
Notes:
1. Output noise is measured with a 10 µF tantalum capacitor and a 1.0 µF ceramic capacitor connected
in parallel across the output. Ripple & noise is 150 mV typical for 24 VDC output models.
2. Transient recovery is measured to within a 1% error band for a load step change of 75% to 100%.
3. Output overload protection is provided by a “hiccup” mode circuit
4. The ambient temperature range is the maximum possible for a converter with a heatsink mounted.
Natural convection is 20 LFM, not “still air”. See the power derating curves on page 3 for the operating
temperature limits for specific models.
5. Exceeding absolute maximum ratings may damage the module. These are not
continuous operating ratings.
7. Operation at no-load will not damage these units, but they may not meet all specifications.
8. If the remote sense outputs are not used, the +Sense (pin 7) should be connected to
+VOUT (pin 8) and the -Sense (pin 5) should be connected to -VOUT (pin 4).
9. It is recommended that a fuse be used on the input of a power supply for protection. For the
correct rating, see the model selection table above.
EMC Specifications
Parameter
Radiated Emissions
Conducted Emissions
ESD
RS
EFT
Surge
CS
Standard
See Note 1
EN 50121
See Note 1
EN 55011
EN 61000-4-2
EN 61000-4-3
See Note 2 EN 61000-4-4
See Note 2 EN 61000-4-5
EN 61000-4-6
Environmental Standards
Parameter
Vibration & Shock
Cooling Test
Dry Heat
Damp Heat
Standard
EN 61373
EN 60068-2-1
EN 60068-2-2
EN 60068-2-30
Level
Class A
Class A
Criteria A; ±8 kV Air, ±6 kV Contact
Criteria A; 10V/m
Criteria A; ±2 kV
Criteria A; ±1 kV
Criteria A; 10 V/m
Typical Connection
Notes:
1. To meet EN 55011 Class A, and EN 50121-3-2, an external
input filter is required. See the connection diagram below
for a typical circuit.
2. To meet EN 61000-4-4 and EN 61000-4-5, a capacitor
should be connected across the input pins. See the con-
nection diagram below for a typical example.
For applications that require meeting EMC/EMI standards, the diagram above 4. Recommended values for components are:
illustrates a typical connection of the MR75-xxxSxxRW series. The units
do not require external components to operate as specified. Some notes on
this diagram (starting with the input circuit) are:
1. It is recommended that an external slow blow fuse be used. The recom-
Component
Fuse
C1
72 VIN
3,200 mA
68 µF/200V
110 VIN
2,100 mA
68 µF/200V
mended fuse rating is shown in the table at right.
L1
450 µH
450 µH
2. To meet EN 55011 Class A & EN 50121-3-2, an external input filter
C3
2,200 pF/3 kV 2,200 pF/3 kV
is required. In the diagram this filter consists of C1 and L1. The recom-
C4
mended component values are shown in the table at right.
C5
3. To meet EN 61000-4-4 and EN 61000-4-5, a capacitor should be
C6
connected across the input pins. In the connection diagram above,
C7
the value of C1 should be changed to
2,200 pF/3 kV
2,200 pF/3 kV
2,200 pF/3 kV
4.7 µF
2,200 pF/3 kV
2,200 pF/3 kV
2,200 pF/3 kV
4.7 µF
470 µF/200V.
5. The circuit consisting of R1, Q1 and C2 illustrates a simple open collector connection
for the remote on/off control. The resistor (R1) limits the current on the control
line and the capacitor (C2) bypasses noise spikes, helping to prevent phantom
triggering of the control. If the control pin is not being used, it should be left open.
7. The resister R2 is connected as an output adjust.The output adjustment capability
is explained further on page 3.
8. The output sense pins (pin 7 and pin 5) may be used to compensate for the losses
incurred over long leads to an output load. If not used for load compensation or
output adjustment, the sense pins should be connected directly to the appropriate
output pins, pin 7 to pin 8 and pin 5 to pin 4.
9. The output filtering capacitor (C7) is a low ESR (<1⍀) electrolytic capacitor.
Care must be taken in choosing this capacitor not to exceed the capacitive load
specification for the unit.
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