Model Selection Guide

Mechanical Dimensions

MicroPower Direct

www.micropowerdirect.com

232 Tosca Drive Stoughton, MA 02072

■

TEL: (781) 344-8226

■

FAX: (781) 344-8481

■

E-Mail: sales@micropowerdirect.com

Mechanical Notes:

• All dimensions are typical in inches (mm)

• Tolerance x.xx = ±0.01 (±0.25)

• Leads are tin plated for improved solderability.

Notes:

1. When measuring output ripple, it is recommended that an external 0.33 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 1.5 μF capacitors will reduce the output ripple.

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

50% 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 output. 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 <1.0Ω at 100 kHz) capacitor be

mounted close to the converter. For 5V input units a 2.2 μF is recommended, for 12V

input units, a 1.0 μF; and for 24V & 48V units a 0.47 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

Single Output

Dual Output

470 μF Max

±220 μF Max

Capacitive Load

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

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

A301R

5

4.5 - 5.5

1,000

100

100

5.0

600

0.0

60

1,500

A302R

5

4.5 - 5.5

960

100

100

12.0

250

0.0

62

1,500

A303R

5

4.5 - 5.5

960

100

100

15.0

200

0.0

62

1,500

A304R

5

4.5 - 5.5

1,000

100

100

±12.0

±125

±0.0

60

1,500

A305R

5

4.5 - 5.5

1,000

100

100

±15.0

±100

±0.0

60

1,500

A311R

12

10.8 - 13.2

420

50

40

5.0

600

0.0

60

700

A312R

12

10.8 - 13.2

400

50

40

12.0

250

0.0

62

700

A313R

12

10.8 - 13.2

400

50

40

15.0

200

0.0

62

700

A314R

12

10.8 - 13.2

420

50

40

±12.0

±125

±0.0

60

700

A315R

12

10.8 - 13.2

420

50

40

±15.0

±100

±0.0

60

700

A321R

24

21.6 - 26.4

210

25

25

5.0

600

0.0

60

350

A322R

24

21.6 - 26.4

195

25

25

12.0

250

0.0

64

350

A323R

24

21.6 - 26.4

195

25

25

15.0

200

0.0

64

350

A324R

24

21.6 - 26.4

210

25

25

±12.0

±125

±0.0

60

350

A325R

24

21.6 - 26.4

210

25

25

±15.0

±100

±0.0

60

350

A331R

48

43.2 - 52.8

105

15

10

5.0

600

0.0

60

135

A332R

48

43.2 - 52.8

100

15

10

12.0

250

0.0

62

135

A333R

48

43.2 - 52.8

100

15

10

15.0

200

0.0

62

135

A334R

48

43.2 - 52.8

105

15

10

±12.0

±125

±0.0

60

135

A335R

48

43.2 - 52.8

105

15

10

±15.0

±100

±0.0

60

135

Derating Curve