Model Selection Guide

Mechanical Dimensions

Mechanical Notes:

Notes:

1. When measuring output ripple, it is recommended that an external 0.47 µF

ceramic capacitor be placed from the +Vout pin to the -Vout pin for single

output units and from each output to common for dual output units. For

noise sensitive applications, the use of 3.3 µF capacitors will reduce the

output ripple.

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

change of 75% to 100%.

3. Operation at no-load will not damage these units. However, they may not

meet all specifications.

4. Dual output units may be connected to provide a 24 VDC or 30 VDC out-

put. To do this, connect the load across the positive (+Vout) and negative

(-Vout) outputs and float the output common.

5. The converter should be connected to a low ac-impedance source. An

input source with a highly inductive impedance may affect the stability of

the converter. In applications where the converter output loading is high

and input power is supplied over long lines, it may be necessary to use a

capacitor on the input to insure start-up.

In this case, it is recommended that a low ESR (ESR <1.0

Ω at 100 kHz)

capacitor be mounted close to the converter. For 5V input units a 8.2 µF is

recommended, for 12V input units, a 3.3 µF; and for 24V & 48V units a

1.5 µF.

6. It is recommended that a fuse be used on the input of a power supply for

protection. See the table above for the correct rating.

Pin Connections

Capacitive Load

Model

Number

Input

Output

Efficiency

(%, Typ)

Fuse Rating

Slow-Blow

(mA)

Voltage (VDC)

Current (mA)

Reflected

Ripple

Current

(mA, Typ)

Voltage

(VDC)

Current

(mA, Max)

Current

(mA, Min)

Nominal

Range

Full-Load

No-Load

A301ERW

5

4.5 - 9.0

857

40

100

5.0

600

60

70

1,500

A302ERW

5

4.5 - 9.0

811

40

100

12.0

250

25

74

1,500

A303ERW

5

4.5 - 9.0

811

40

100

15.0

200

20

74

1,500

A304ERW

5

4.5 - 9.0

811

40

100

±12.0

±125

±12

74

1,500

A305ERW

5

4.5 - 9.0

811

40

100

±15.0

±100

±10

74

1,500

A311ERW

12

9.0 - 18.0

329

20

30

5.0

600

60

76

700

A312ERW

12

9.0 - 18.0

313

20

30

12.0

250

25

80

700

A313ERW

12

9.0 - 18.0

313

20

30

15.0

200

20

80

700

A314ERW

12

9.0 - 18.0

313

20

30

±12.0

±125

±12

80

700

A315ERW

12

9.0 - 18.0

313

20

30

±15.0

±100

±10

80

700

A321ERW

24

18.0 - 36.0

162

5

15

5.0

600

60

77

350

A322ERW

24

18.0 - 36.0

154

5

15

12.0

250

25

81

350

A323ERW

24

18.0 - 36.0

154

5

15

15.0

200

20

81

350

A324ERW

24

18.0 - 36.0

154

5

15

±12.0

±125

±12

81

350

A325ERW

24

18.0 - 36.0

154

5

15

±15.0

±100

±10

81

350

A331ERW

48

36.0 - 75.0

81

3

10

5.0

600

60

77

135

A332ERW

48

36.0 - 75.0

77

3

10

12.0

250

25

81

135

A333ERW

48

36.0 - 75.0

77

3

10

15.0

200

20

81

135

A334ERW

48

36.0 - 75.0

77

3

10

±12.0

±125

±12

81

135

A335ERW

48

36.0 - 75.0

77

3

10

±15.0

±100

±10

81

135

Pin

Single

Dual

1, 24

+Vin

+Vin

2, 23

NC

-Vout

3, 22

NC

Common

10, 15

-Vout

Common

11, 14

+Vout

+Vout

12, 13

-Vin

-Vin

NC: No Connection

Single Output

(µF Max)

Dual Output

(µF Max)

2,000

±1,000

MicroPower Direct

www.micropowerdirect.com

292 Page Street Ste D Stoughton, MA 02072

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TEL: (781) 344-8226

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FAX: (781) 344-8481

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E-Mail: sales@micropowerdirect.com

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