Model Selection Guide

www.micropowerdirect.com

Notes:

1. Start up time is measured at nominal input and with a constant resistive

load.

2. When measuring output ripple, it is recommended that an external

3. Transient recovery is measured to within a 1% error band for a load step

change of 25%.

4. Short circuit protection is provided by a “hiccup mode” circuit.

5. If the on/off pin is left open, the unit operates. If it is grounded, the unit

will shut off.

6. 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.

7. These units should not be operated over +85°C. Exceeding +85°C may

damage the unit.

8. 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.

Model

Number

Input

Output

Efficiency

(%, Typ)

Over

Voltage

Protection

(VDC Typ)

Capacitive

Load

(µF, Max)

Fuse

Rating

Slow-Blow

(mA)

Voltage

(VDC)

Current

(mA, Max)

Current

(mA, Min

)

Nominal

Range

Full-Load No-Load

MB3024S-03ERW

24

18.0 - 36.0

960

120

3.3

6,000

600

87

3.96

6,800

2,000

MB3024S-05ERW

24

18.0 - 36.0

1,460

120

5.0

6,000

600

88

6.00

6,800

3,000

MB3024S-09ERW

24

18.0 - 36.0

1,440

20

9.0

3,333

333

88

10.8

680

3,000

MB3024S-12ERW

24

18.0 - 36.0

1,440

20

12.0

2,500

250

88

15.0

680

3,000

MB3024S-15ERW

24

18.0 - 36.0

1,440

20

15.0

2,000

200

89

18.0

680

3,000

MB3024S-24ERW

24

18.0 - 36.0

1,440

20

24.0

1,250

125

89

28.0

470

3,000

MB3048S-03ERW

48

36.0 - 75.0

500

80

3.3

6,000

600

87

3.96

6,800

1,000

MB3048S-05ERW

48

36.0 - 75.0

730

80

5.0

6,000

600

88

6.00

6,800

1,500

MB3048S-12ERW

48

36.0 - 75.0

720

20

12.0

2,500

250

89

15.0

680

1,500

MB3048S-15ERW

48

36.0 - 75.0

720

20

15.0

2,000

200

89

18.0

680

1,500

MB3048S-24ERW

48

36.0 - 75.0

720

20

24.0

1,250

125

88

28.0

470

1,500

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

3

Where A =

2

A

3

Where A =

Parameter

3.3

5.0

9.0

12

15

24

4.801

2.883

7.500

10.971

14.497

24.872

2.863

2.864

2.864

2.864

2.864

2.864

15.00

10.00

15.00

17.80

17.80

20.00

1.24

2.50

2.50

2.50

2.50

2.50

Output Trim Resistor Values