Model Selection Guide
www.micropowerdirect.com
Input
Output
Over
Fuse
Rating
Capacitive
Load
(µF, Max)
Model
Number
Efficiency Voltage
Voltage (VDC)
Current (mA)
Full-Load No-Load
Voltage Current
Current
(mA, Min)
(%, Typ)
Protection
(VDC Typ)
Slow-Blow
(mA)
(VDC)
(mA, Max)
Nominal
24
Range
MB1524S-03ERU
MB1524S-05ERU
MB1524S-12ERU
MB1524S-15ERU
MB1524S-24ERU
MB1524D-05ERU
MB1524D-12ERU
MB1524D-15ERU
MB1548S-03ERU
MB1548S-05ERU
MB1548S-12ERU
MB1548S-15ERU
MB1548D-05ERU
MB1548D-12ERU
MB1548D-15ERU
Notes:
9.0 - 36.0
9.0 - 36.0
9.0 - 36.0
9.0 - 36.0
9.0 - 36.0
9.0 - 36.0
9.0 - 36.0
9.0 - 36.0
18.0 - 75.0
18.0 - 75.0
18.0 - 75.0
18.0 - 75.0
18.0 - 75.0
18.0 - 75.0
18.0 - 75.0
633
695
703
703
695
727
710
710
316
351
355
347
363
355
351
45
45
15
15
20
20
15
15
35
35
10
10
20
15
15
3.3
5.0
4,000
3,000
1,250
1,000
625
200
150
63
87
90
89
89
90
86
88
88
87
89
88
90
86
88
89
3.9
6.2
10,200
4,020
1,035
705
1,500
1,500
1,500
1,500
1,500
1,500
1,500
1,500
1,000
1,000
1,000
1,000
1,000
1,000
1,000
24
24
12.0
15.0
24.0
5.0
15.0
18.0
30.0
6.2
24
50
24
31
470
24
1,500
625
75
4,800
800
24
12.0
15.0
3.3
32
15.0
18.0
3.9
24
500
25
500
48
4,000
3,000
1,250
1,000
1,500
625
200
150
63
10,200
4,020
1,035
705
48
5.0
6.2
48
12.0
15.0
5.0
15.0
18.0
6.2
48
50
48
75
4,800
800
48
12.0
15.0
32
15.0
18.0
48
500
25
500
Derating Curve
1. The specified maximum capacitive load is for each output.
2. Start up time is measured at nominal input and with a constant resistive load.
3. Cross regulation is measured with the main output set at 50% load.The second output is varied
from 10% to 100% load.
4. When measuring output ripple, it is recommended that an external ceramic capacitor (approx
1 µF to 10 µF) be placed from the +VOUT to the -VOUT pins.
5. Transient recovery is measured to within a 1% error band for a load step change of 25%.
6. Short circuit protection is provided by a “hiccup mode” circuit.
7. Isolation capacitance for 24 VDC output models is 2,000 pF. Isolation capacitance is measured
from input to output at 100 kHz/0.1V.
8. The control input (pin 6) is referenced to the -VIN (pin 2) input. If it is grounded, the unit will
shut off.
9. These units should not be operated with a load under 10% of full load. Operation at no-load will
not damage the unit, but they may not meet all specifications.
10. These units should not be operated over +85°C. Exceeding +85°C may damage the unit.
11. 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.
External Trim
External Trim Notes:
On single output units, an external resistor can be used to adjust the converter
output up/down by about 10%. The connection is shown in the diagram at left. The
required resistor value is calculated by the formulas:
A $ R2
V
REF
=
=
=
-
Trim UP RTRIM
R3 Where A
$R1
REF
-
-
V
R2
A
VTRIM
-
VTRIM V
REF
A $ R1
REF
=
=
=
-
Trim Down RTRIM
R3 Where A
$R2
-
R1
A
V
Where RTRIM = The value of the external trim resistor
VTRIM = The amount of voltage adjustment required
The value of R1, R2, R3 and VREF are given in the table below.
Output Voltage (VDC)
Parameter
3.3
5.0
9.0
12
15
24
R1 (kꢁ)
R2 (kꢁ)
R3 (kꢁ)
VREF (V)
4.801
2.863
15.00
1.24
2.883
2.864
10.00
2.50
7.500
2.864
15.00
2.50
10.971
2.864
17.80
2.50
14.497
2.864
17.80
2.50
24.872
2.864
20.00
2.50
If not used, the Trim pin (pin 4) should be left open. Please contact the factory for more information.
TEL: (781) 344-8226 FAX: (781) 344-8481 E-Mail: sales@micropowerdirect.com
292 Page Street Ste D Stoughton, MA 02072
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