Model Selection Guide
www.micropowerdirect.com
Input
Output
Fuse
Rating
Reflected
Capacitive
Load
Model
Number
Efficiency
(%, Typ)
Ripple
Voltage (VDC)
Current (mA)
Full-Load No-Load
Voltage Current
Current
(mA, Min)
Current
(mA Typ)
Slow-Blow
(mA)
(µF, Max)
(VDC)
(mA, Max)
Nominal
5
Range
MD105S-05ERW
MD105S-12ERW
MD105S-15ERW
MD105D-05ERW
MD105D-12ERW
MD105D-15ERW
MD112S-03ERW
MD112S-05ERW
MD112S-12ERW
MD112S-12ERW
MD112S-15ERW
MD112D-05ERW
MD112D-12ERW
MD112D-15ERW
MD124S-03ERW
MD124S-05ERW
MD124S-12ERW
MD124S-15ERW
MD124S-24ERW
MD124D-05ERW
MD124D-12ERW
MD124D-15ERW
MD148S-03ERW
MD148S-05ERW
MD148S-12ERW
MD148S-15ERW
MD148D-05ERW
MD148D-12ERW
MD148D-15ERW
4.5 - 9.0
4.5 - 9.0
278
263
267
274
263
267
112
108
106
104
104
107
103
104
56
54
51
53
54
52
52
52
28
25
25
25
25
25
25
12
12
12
12
12
12
12
12
6
6
6
6
6
6
6
6
4
5.0
12.0
15.0
5.0
12.0
15.0
3.3
200
83
67
100
42
33
303
200
111
83
67
100
42
10.0
4.0
3.0
5.0
2.0
2.0
15.0
10.0
6.0
4.0
3.0
5.0
2.0
2.0
15.0
10.0
4.0
3.0
2.0
5.0
2.0
2.0
38
72
76
75
73
76
75
75
77
79
80
80
78
81
80
75
77
81
79
77
80
80
80
75
76
81
80
76
80
80
30.0
30.0
30.0
30.0
30.0
30.0
40.0
40.0
40.0
40.0
40.0
40.0
40.0
40.0
55.0
55.0
55.0
55.0
55.0
55.0
55.0
55.0
70.0
70.0
70.0
70.0
70.0
70.0
70.0
2,200
1,000
680
1,000
470
600
600
600
600
600
600
250
250
250
250
250
250
250
250
125
125
125
125
125
125
125
125
75
5
5
5
5
5
4.5 - 9.0
4.5 - 9.0
4.5 - 9.0
4.5 - 9.0
330
12
12
12
12
12
12
12
12
24
24
24
24
24
24
24
24
48
48
48
48
48
48
48
9.0 - 18.0
9.0 - 18.0
9.0 - 18.0
9.0 - 18.0
9.0 - 18.0
9.0 - 18.0
9.0 - 18.0
9.0 - 18.0
18.0 - 36.0
18.0 - 36.0
18.0 - 36.0
18.0 - 36.0
18.0 - 36.0
18.0 - 36.0
18.0 - 36.0
18.0 - 36.0
36.0 - 75.0
36.0 - 75.0
36.0 - 75.0
36.0 - 75.0
36.0 - 75.0
36.0 - 75.0
36.0 - 75.0
2,700
2,200
1,800
1,000
680
1,000
470
330
2,700
2,200
1,000
680
470
1,000
470
5.0
9.0
12.0
15.0
5.0
12.0
15.0
3.3
33
303
200
83
67
42
100
42
33
758
200
83
5.0
12.0
15.0
24.0
5.0
12.0
15.0
3.3
330
2,700
2,200
1,000
680
1,000
470
27
26
26
27
26
26
4
4
4
4
4
4
5.0
10.0
4.0
3.0
5.0
2.0
2.0
75
75
75
75
75
75
12.0
15.0
5.0
12.0
15.0
67
100
42
33
330
Notes:
Derating Curve
1. At no load, output voltage accuracy is 1.5ꢀ typical and 5.ꢁꢀ max.
2. The load on dual output units should not be unbalanced more than 5 ꢀ. Units
operated with unbalanced loads greater than 5ꢀ may not meet all specifications.
3. When measuring output ripple & noise, it is recommended that an external capacitor
(1ꢁꢁ µF typ.) be placed from the +VOUT to the -VOUT pins for single output units and
from each output to common for dual output models.
4. Transient recovery is measured to within a 1ꢀ error band for a load step change
of 25ꢀ.
5. With the addition of the DCFM-0x (or a similar discrete filter), all models will meet EN
55ꢁ22 class B. A suggested input circuit is shown in the connection diagram on page 3.
Contact the factory for more information.
6. To meet the requirements of EN 61ꢁꢁꢁ-4-4 ( 2 kV), external components are needed.
The connection diagram on page 3 shows an external input filter that would typically
achieve this.With the addition of the DCFM-0x, EN 61ꢁꢁꢁ-4-4 ( 4kV) can be achieved.
Contact the factory for more information.
7. To meet the requirements of EN 61ꢁꢁꢁ-4-5 ( 2 kV), external components are needed.
This can be done discretely (as shown in the connection diagram on page 3), or with the
addition of the DCFM-0x. Contact the factory for more information.
8. These units should not be operated with a load under 5ꢀ of full load.Operation at no-load
will not damage the unit, but they may not meet all specifications.
9. It is recommended that a fuse be used on the input of a power supply for protection. See
the Model Selection table above for the correct rating.
Remote ON/OFF Control
The MD100x-ERW may be started or shutdown by the control pin input (pin 3). This input is
current controlled. The unit operates when this input is open. When the input is “high” (current
is flowing into the pin), the converter shuts down. The input current to this pin should be kept
between 5 mA to 1ꢁ mA. Exceeding 2ꢁ mA on this input or connecting it directly to ground
could damage the converter.
The diagram at right gives a suggested input circuit for the control pin. The diode (D1) is an
RB16ꢁM-6ꢁ/1A and CD is is a 47 nF/1ꢁꢁV. The resistor R1 is determined by the formula:
R = [(VC-VD-1.ꢁ)/IC]-3ꢁꢁ
Where: VC = voltage to ground from pin 3
VD = the forward conduction voltage drop of D1
IC = the control pin current (5 - 1ꢁ mA)
292 Page Street Ste D Stoughton, MA 02072
• TEL: (781) 344-8226 • FAX: (781) 344-8481 • E-Mail: sales@micropowerdirect.com
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