CMDBW Series
40 Watt Single Output
Rev. B
Chassis Mount DC/DC Converter
4:1 Ultra Wide Input Voltage Range
FEATURES
● High Efficiency up to 88%
UL
● RoHS Directive Compliant
● Fixed Switching Frequency
● Six-Sided Continuous Shield
● 40 Watts Maximum Output power
● 4:1 Ultra Wide Input Voltage Range
● Call Factory for More Output Power Options
TUV
CB
CE MARK
● Chassis Mount Options: Open Frame, U Channel, and Enclosed Types Available
SPECIFICATIONS: CMDBW Series
All specifications apply @ 25°C ambient unless otherwise noted
INPUT SPECIFICATIONS
GENERAL SPECIFICATIONS
Efficiency ........................................................................................see table
Switching Frequency .................................................................300KHz typ.
Input Voltage Range ............ 24V nominal input........................ 9 - 36VDC
48V nominal input...................... 18 - 75VDC
Under Voltage Lockout
Isolation Voltage
24V nominal input........... DC-DC ON..........................................9 VDC
DC-DC OFF........................................8 VDC
Input to Output...................................................................1600VDC min.
Input to Case .....................................................................1600VDC min.
Output to Case...................................................................1600VDC min.
48V nominal input........... DC-DC ON........................................18 VDC
DC-DC OFF......................................16 VDC
Isolation Resistance ...............................................................109 ohms min.
Isolation Capacitance ............................................................. 1500pF max.
ENVIRONMENTAL SPECIFICATIONS
Input Voltage Variation......... dv/dt............................................ 5V/ms max
(Complies with ETS300 132 part 4.4)
Input Surge Voltage (100ms max) ............... 24V input ...................50VDC
48V input .................100VDC
Operating Ambient Temperature............. -40°C to +55°C (without derating)
+55°C to +105°C (with derating)
Input Reflected Ripple Current (nominal Vin and FL) ...................20mAp-p
Storage Temperature ..........................................................-55°C ~ +125°C
Maximum Case Temperature........................................................... +105°C
Relative Humidity...................................................................5% to 95% RH
Temperature Coefficient................................................... ±0.02% / °C max.
Start Up Time (nominal Vin and constant resistive load)
Power Up..............................................................................20ms max.
Remote ON/OFF ..................................................................20ms max.
Remote ON/OFF (See Note 1)
Positive Logic ................ DC-DC ON................Open or 3V < Vr < 12V
DC-DC OFF.............Short or 0V < Vr < 1.2V
Thermal Impedance (See Note 3)
Without Heat-Sink..............................................................9.2°C / Watt
Negative Logic ............... DC-DC ON...............Short or 0V < Vr < 1.2V
With Heat-Sink.....................................................................7.6°C/Watt
DC-DC OFF..............Open or 3V < Vr < 12V
Thermal Shock .................................................................... MIL-STD-810D
Vibration ................................10~55Hz, 10G, 30 minutes along X, Y, and Z
Remote Off Input Current (nominal Vin) ..............................................3mA
OUTPUT SPECIFICATIONS
MTBF (See Note 2) ........Bellcore TR-NWT-000332............ 1.105 x 106 hrs
MIL-STD-217F ............................. 1.511 x 105 hrs
Output Voltage..............................................................................see table
Voltage Accuracy (nom Vin and full load)........................................... ±1%
Voltage Adjustability........................................................................... ±10%
Output Current ..............................................................................see table
Output Power........................................................................ 40 watts max.
Line Regulation (LL to HL at FL)....................................................... ±0.2%
Load Regulation (min. load to 100% load)....................................... ±0.5%
Minimum Load ..............................................................................see table
Ripple/Noise (See Note 4) ............................................................see table
PHYSICAL SPECIFICATIONS
Potting material of the DC/DC Converter ..........................Epoxy (UL94-V0)
Shielding of the DC/DC Converter............................................... six – sided
Weight ............................................................................Approximately 7 oz
Dimensions............................................ 4.00(L) x 2.25(W) x 0.81(H) inches
SAFETY &EMC SPECIFICATIONS
Approvals and Standards .................. IEC60950-1, UL60950-1, EN60950-1
Conducted Emissions.................EN55022...................................... Class A
Radiated Emissions....................EN55022........................................... Class A
ESD ............................................EN61000-4-2.....................Perf. Criteria B
Radiated Immunity......................EN61000-4-3.....................Perf. Criteria A
Fast Transient.............................EN61000-4-4.....................Perf. Criteria B
Surge..........................................EN61000-4-5.....................Perf. Criteria B
Conducted Immunity...................EN61000-4-6.................... Perf. Criteria A
Transient Response Recovery Time..................................................250us
(25% load step change)
PROTECTION SPECIFICATIONS
Over Voltage Protection....................................3.3V Output ...............3.9V
(Zener diode clamp)
5V Output ..................6.2V
12V Output .................15V
15V Output .................18V
±12V Output .............±15V
±15V Output .............±18V
Over Load Protection (% of FL at nominal input)...................... 150% max.
Short Circuit Protection....................................Hiccup, automatic recovery
Over Temperature Protection .................................................... 110°C typ.
Due to advances in technology, specifications subject to change without notice
Wall Industries, Inc. 5 Watson Brook Road Exeter, NH 03833
603-778-2300 www.wallindustries.com Fax 603-778-9797
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