Wall Industries, Inc. 5 Watson Brook Road Exeter, NH 03833

603-778-2300 www.wallindustries.com Fax 603-778-9797

CMMM Series

2:1 Input Voltage Ranges

18~30 Watt, Single Output

Chassis Mount DC/DC Converter

Rev A

SPECIFICATION

TEST CONDITIONS

Min

Nom

Max

Unit

GENERAL

Efficiency

See Table

Switching Frequency

290

330

360

KHz

Isolation Voltage Rated

60 seconds

1500

VDC

Isolation Voltage Test

Flash Test for 1 second

1650

VDC

Isolation Resistance

500VDC

1000

MΩ

Isolation Capacitance

100KHz, 1V

1200

1500

pF

Internal Power Dissipation

5,500

mW

ENVIRONMENTAL

Operating Temperature (Ambient)

-40

+50

°C

Operating Temperature (Case)

-40

+105

°C

Storage Temperature

-50

+125

°C

Lead Temperature

1.5mm from case for 10 seconds

260

°C

Humidity

95

%

Cooling

Free air convection

RFI

Six-sided shielding, metal case

Temperature Coefficient

±0.01

±0.02

%/°C

MTBF

MIL-HDBK-217F @ 25°C, Ground Benign

1000

Khours

Conducted EMI

EN55022 Class A

PHYSICAL

Weight

Approximately 7oz

Dimensions (L x W x H)

4.00 x 2.25 x 0.81 inches

Case Material of DC/DC converter

Metal with non-conductive baseplate

Flammability

UL94V-0

MODEL SELECTION TABLE

Model Number

Input Voltage

Output

Voltage

Output Current

Input Current

Reflected

Ripple Current

Efficiency

(Typ)

Over Voltage

Protection

Maximum

Capacitive Load

Min

Max

No Load

Max Load

CMMM12S3.3-5500

12 VDC

(9 ~ 18 VDC)

3.3 VDC

400 mA

5500 mA

40 mA

1867 mA

100 mA

81%

3.9 VDC

470 μF

CMMM12S5-5000

5 VDC

350 mA

5000 mA

2480 mA

84%

6.8 VDC

470 μF

CMMM12S12-2500

12 VDC

166 mA

2500 mA

2841 mA

88%

15 VDC

470 μF

CMMM12S15-2000

15 VDC

133 mA

2000 mA

2841 mA

88%

18 VDC

470 μF

CMMM24S3.3-5500

24 VDC

(18 ~ 36 VDC)

3.3 VDC

300 mA

5500 mA

20 mA

922 mA

50 mA

82%

3.9 VDC

470 μF

CMMM24S5-5000

5 VDC

300 mA

5000 mA

1225 mA

85%

6.8 VDC

470 μF

CMMM24S12-2500

12 VDC

300 mA

2500 mA

1404 mA

89%

15 VDC

470 μF

CMMM24S15-2000

15 VDC

125 mA

2000 mA

1404 mA

89%

18 VDC

470 μF

CMMM48S3.3-5500

48 VDC

(36 ~ 75 VDC)

3.3 VDC

300 mA

5500 mA

10 mA

461 mA

25 mA

82%

3.9 VDC

470 μF

CMMM48S5-5000

5 VDC

300 mA

5000 mA

613 mA

85%

6.8 VDC

470 μF

CMMM48S12-2500

12 VDC

300 mA

2500 mA

702 mA

89%

15 VDC

470 μF

CMMM48S15-2000

15 VDC

125 mA

2000 mA

702 mA

89%

18 VDC

470 μF

NOTES

1. Transient recovery time is measured to within 1% error band for a step change in output load of 75% to 100%.

2. The CMMM series requires a minimum output loading to maintain specified regulations. Operation under no-load

conditions will not damage these devices, however they may not meet all listed specifications.

3. Other input and output voltages may be available, please contact factory.

4. Heat-sink is optional, please consult factory for ordering details.

Due to advances in technology, specifications subject to change without notice.