Rev B
CMMMW Series
4:1 Input Voltage Ranges
18~30 Watt, Single Output
Chassis Mount DC/DC Converter
● Soft Start
● Output Trim
● Single Output
● 1500VDC Isolation
● Efficiency up to 89%
● Remote On/Off Control
● MTBF > 1,000,000 Hours
● CSA1950 Safety Approval
● 4:1 Wide Input Voltage Range
● Complies with EN55022 Class A
● Call Factory for More Output Power Options
● Short Circuit, Over Voltage, and Over Temperature Protected
● Chassis Mount Options: Open Frame, U Channel, and Enclosed Types Available
FEATURES
DESCRIPTION
The CMMMW series of chassis mount DC/DC converters offers up to 30 watts of output power. These converters operate over input
voltage ranges of 10-40VDC and 18-75VDC. This series also provides regulated single outputs of
3.3, 5, 12, and 15VDC.
Other features
include remote on/off control, output trim function, and efficiencies up to 89%. All models are over voltage, over temperature and short
circuit protected. The EN55022 Class A conducted noise compliance minimizes design time, cost, and eliminates the need for external filter
components. These converters are best suited for data
communication
equipment, mobile battery driven equipment, distributed power
systems, telecommunications equipment, mixed analog/digital subsystems, process/machine control equipment, computer peripheral
systems, and industrial robot systems. Chassis mounts come in open frame, U channel, and enclosed types.
SPECIFICATIONS:
CMMMW Series
All specifications are based on 25°C, Nominal Input Voltage, and Maximum Output Current unless otherwise noted.
We reserve the right to change specifications based on technological advances.
SPECIFICATION
TEST CONDITIONS
Min
Nom
Max
Unit
INPUT (V
in
)
24V nominal input models
10
24
40
VDC
Input Voltage Range
48V nominal input models
18
48
75
VDC
24V nominal input models
9.4
9.7
10
VDC
Start Voltage
48V nominal input models
17
17.5
18
VDC
24V nominal input models
9
9.3
9.5
VDC
Under Voltage Shutdown
48V nominal input models
16
16.5
17
VDC
Reverse Polarity Input Current
All models
2
A
Short Circuit Input Power
4500
mW
24V nominal input models
-0.7
50
VDC
Input Surge Voltage
48V nominal input models
-0.7
100
VDC
OUTPUT (V
o
)
Output Voltage
See
Table
Output Voltage Accuracy
±0.5
±1.0
%
Output Trim
% of nominal output
±9.0
±10.0
±11.0
%
Load Regulation
Io = 50% to 100%
±0.3
±1.0
%
Line Regulation
Vin = min. to max.
±0.2
±0.5
%
Output Power
30
W
Output Current Range
See Table
Ripple & Noise (20MHz)
55
80
mV
pk-pk
Ripple & Noise (20MHz)
Over Line, Over Load, and Over Temperature
100
mV
pk-pk
Ripple & Noise (20MHz)
10
mVrms
Transient Recovery Time
25% load step change
150
300
μs
Transient Response Deviation
±2
±4
%
Temperature Coefficient
±0.01
±0.02
%/°C
REMOTE ON/OFF
Supply On
2.5 to 100VDC or Open Circuit
Supply Off
-1
1
VDC
Standby Input Current
2
5
mA
Control Input Current (On)
Vin
–
RC = 5.0V
5
μA
Control Input Current (Off)
Vin
–
RC = 0V
-100
μA
Control Common
Referenced to negative input
PROTECTION
Over Power Protection
120
180
%
Short Circuit Protection
Continuous
Over Voltage Protection
See Table
Over Temperature Protection
Case Temperature, automatic
107
112
117
°C
Wall Industries, Inc. • Tel: 603-778-2300 • Toll Free: 888-597-9255 •
website:
www.wallindustries.com
• e-mail:
sales@wallindustries.com
5/15/2019
Page 1 of 8
Rev B
CMMMW Series
4:1 Input Voltage Ranges
18~30 Watt, Single Output
Chassis Mount DC/DC Converter
Min
290
1500
1650
1000
Nom
Max
Unit
KHz
VDC
VDC
MΩ
pF
mW
SPECIFICATION
GENERAL
Efficiency
Switching Frequency
Isolation Voltage Rated
Isolation Voltage Test
Isolation Resistance
Isolation Capacitance
Internal Power Dissipation
Max. Capacitive Load
ENVIRONMENTAL
Operating Temperature (Ambient)
Operating Temperature (Case)
Storage Temperature
Lead Temperature
Humidity
Cooling
RFI
MTBF
Conducted EMI
PHYSICAL
Weight
Dimensions (L x W x H)
Case Material of DC/DC Converter
Flammability
TEST CONDITIONS
60 seconds
Flash Test for 1 second
500VDC
100KHz, 1V
See Table
330
360
1200
1500
5,500
See Table
1.5mm from case for 10 seconds
MIL-HDBK-217F @ 25°C, Ground Benign
+50
°C
+105
°C
+125
°C
260
°C
95
%
Free air convection
Six-sided shielding, metal case
1000
Khours
EN55022 Class A
Approximately 7oz
4.00 x 2.25 x 0.81 inches
Metal with non-conductive baseplate
UL94V-0
-40
-40
-50
MODEL SELECTION TABLE
Model Number
CMMMW24S3.3-5500
CMMMW24S5-5000
CMMMW24S12-2500
CMMMW24S15-2000
CMMMW48S3.3-5500
CMMMW48S5-5000
CMMMW48S12-2500
CMMMW48S15-2000
48 VDC
(18 ~ 75 VDC)
24 VDC
(10 ~ 40 VDC)
Input Voltage
Output
Voltage
3.3 VDC
5 VDC
12 VDC
15 VDC
3.3 VDC
5 VDC
12 VDC
15 VDC
Output Current
Min
Max
400 mA
350 mA
166 mA
133 mA
400 mA
350 mA
166 mA
133 mA
5500 mA
5000 mA
2500 mA
2000 mA
5500 mA
5000 mA
2500 mA
2000 mA
10 mA
20 mA
Input Current
Reflected
No Load Max Load Ripple Current
922 mA
1225 mA
1404 mA
1404 mA
461 mA
613 mA
702 mA
702 mA
25 mA
50 mA
Efficiency Over Voltage
Maximum
(Typ)
Protection
Capacitive Load
82%
85%
89%
89%
82%
85%
89%
89%
3.9 VDC
6.8 VDC
15 VDC
18 VDC
3.9 VDC
6.8 VDC
15 VDC
18 VDC
10000 μF
10000 μF
1000 μF
1000 μF
10000 μF
10000 μF
1000 μF
1000 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 CMMMW 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. Heatsink is optional. Please consult factory for ordering details.
5.
Chassis Mount Options: No suffix for open frame, “U” suffix for U Channel, and “E” suffix for Enclosed type.
Due to advances in technology, specifications subject to change without notice.
5/15/2019
Wall Industries, Inc. • Tel: 603-778-2300 • Toll Free: 888-597-9255 •
website:
www.wallindustries.com
• e-mail:
sales@wallindustries.com
Page 2 of 8
Rev B
CMMMW Series
4:1 Input Voltage Ranges
18~30 Watt, Single Output
Chassis Mount DC/DC Converter
BLOCK DIAGRAM
Single Output
+Vin
LC
Filter
+Vo
Vin ( VDC )
150
140
130
120
110
100
90
80
70
60
50
40
30
20
INPUT VOLTAGE TRANSIENT RATING
48VDC Input Models
-Vo
-Vin
On/Off
OVP
OTP
PWM
Isolation
OVP
Ref.Amp
24VDC Input Models
Trim
10
0
10uS
100uS
1mS
10mS
100mS
EFFICIENCY GRAPHS
Efficiency vs Input Voltage (Single Output)
100
90
Efficiency vs Output Load (Single Output)
100
90
Efficiency (%)
80
70
60
50
Efficiency (%)
Low
Nom
Input Voltage (V)
High
80
70
60
50
40
30
10
20
40
60
80
100
Load Current (%)
DERATING CURVE
100
80
Output Power (%)
400LFM
Natural
convection
100LFM
200LFM
60
40
20
0
-40
~
¡ã
50
60
70
80
90
100
110
Ambient Temperature (°C)
5/15/2019
Wall Industries, Inc. • Tel: 603-778-2300 • Toll Free: 888-597-9255 •
website:
www.wallindustries.com
• e-mail:
sales@wallindustries.com
Page 3 of 8
Rev B
CMMMW Series
4:1 Input Voltage Ranges
18~30 Watt, Single Output
Chassis Mount DC/DC Converter
MECHANICAL DRAWING
Unit: inches [mm]
3.66 [93.0]
.16 [4.06] 2X
5/15/2019
Wall Industries, Inc. • Tel: 603-778-2300 • Toll Free: 888-597-9255 •
website:
www.wallindustries.com
• e-mail:
sales@wallindustries.com
.17 [4.3]
+ Vin
+ Out
CNTL
-Vin
2.25 [57.2]
1.13 [28.6]
-Out
TRM
4.00 [101.6]
MODEL NAME
.81 [20.6]
LABEL
Page
4
of 8
Rev B
CMMMW Series
4:1 Input Voltage Ranges
18~30 Watt, Single Output
Chassis Mount DC/DC Converter
DESIGN & FEATURE CONSIDERATIONS
Over Current Protection
To provide protection in a fault (output overload) condition, the unit is equipped with internal current limiting circuitry and can
endure current limiting for an unlimited duration. At the point of current-limit inception, the unit shifts from voltage control to
current
control. The unit operates normally once the output current is brought back into its specified range.
Over Voltage Protection
The output over voltage clamp consists of control circuitry that is dependent on the primary regulation loop that monitors the
voltage on the output terminals. The control loop of the clamp has a higher voltage set point than the primary loop. This
provides a redundant voltage control that reduces the risk of an output over voltage. The OVP level can be found in the
protection specifications.
Input Source Impedance
The power module should be connected to a low ac-impedance input source. Highly inductive source impedances can affect
the stability of the power module. In applications where power is supplied over long lines and output loading is high, it may
be necessary to use a capacitor at the input to ensure startup. A capacitor mounted close to the power module helps ensure
stability of the unit, it is recommended to use a good quality low Equivalent Series Resistance (ESR < 1.0Ω at 100KHz)
capacitor of a 33μF for the 24V input models and a 10μF for the 48V input models.
+
DC Power
Source
-
+
Cin
+Vin
DC / DC
Converter
-Vin
-Out
+Out
Load
Remote On/Off
Positive logic remote on/off turns the module on during a logic high voltage on the remote on/off pin, and turns the module off
during a logic low. To turn the power module on and off, the user must supply a switch to control the voltage between the
on/off terminal and the
-Vin
terminal. The switch can be an open collector or equivalent.
A logic low is
-1V
to 1.0V.
A logic high is 2.5V to 100V.
The maximum sink current at the on/off terminal (pin 4) during a logic low is
-100μA.
The maximum allowable leakage
current of the switch at the on/off terminal (pin 4) during a logic high (2.5 to 100V) is 5μA.
5/15/2019
Wall Industries, Inc. • Tel: 603-778-2300 • Toll Free: 888-597-9255 •
website:
www.wallindustries.com
• e-mail:
sales@wallindustries.com
Page 5 of 8
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