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

BLOCK DIAGRAM

INPUT VOLTAGE TRANSIENT RATING

10uS

150

140

130

120

110

100

90

80

70

60

100uS

1mS

10mS

100mS

50

40

30

20

10

0

48VDC Input Models

24VDC Input Models

12VDC Input Models

DERATING CURVES & EFFICIENCY GRAPHS

Efficiency vs Input Voltage (Single Output)

Efficiency vs Output Load

Input Voltage (V)

Nom

Low

High

50

60

70

80

90

100

Load Current (%)

100

60

40

20

10

80

30

40

50

60

70

80

90

100

Derating Curve without Heatsink

Derating Curve with Heatsink

¡ã

0

20

40

60

80

100

-40

50

60

80

100

110

90

70

400LFM

200LFM

100LFM

Natural

convection

~

0

20

40

60

80

100

-40

50

60

80

100

110

90

70

400LFM

200LFM

100LFM

Natural

convection

Ambient Temperature (°C)

~

Ambient Temperature (°C)

Single Output

+Vo

PWM

Isolation

Ref.Amp

LC

Filter

+Vin

-Vin

-Vo

On/Off

Trim

OVP

OTP

OVP