CMDB Series
Rev. B
2:1 Input Voltage Range
Chassis Mount DC/DC Converter
FEATURES
● High Efficiency up to 90%
UL E155800
TUV
● Fixed Switching Frequency
● Six-Sided Continuous Shield
● 2:1 Wide Input Voltage Range
● International Safety Standard Approval
● Call Factory for More Output Power Options
CB
CE MARK
● Chassis Mount Options: Open Frame, U Channel, and Enclosed Types Available
SPECIFICATIONS: CMDB Series
All specifications apply @ 25°C ambient unless otherwise noted
INPUT SPECIFICATIONS
GENERAL SPECIFICATIONS
Efficiency ........................................................................................see table
Switching Frequency .................................................................300KHz typ.
Input Voltage Range ............ 12V nominal input.......................... 9-18VDC
24V nominal input........................ 18-36VDC
48V nominal input........................ 36-75VDC
Isolation Voltage
Under Voltage Lockout
Input to Output...................................................................1600VDC min.
Input to Case .....................................................................1600VDC min.
Output to Case...................................................................1600VDC min.
12V nominal input............. DC-DC ON...........................................9VDC
DC-DC OFF.........................................8VDC
24V nominal input............. DC-DC ON......................................17.8VDC
Isolation Resistance ...............................................................109 ohms min.
Isolation Capacitance .............................................................. 1000pF max.
ENVIRONMENTAL SPECIFICATIONS
DC-DC OFF.......................................16VDC
48V nominal input............. DC-DC ON.........................................36VDC
DC-DC OFF.......................................34VDC
Input Voltage Variation......... dv/dt............................................ 5V/ms max
Operating Temperature ................................ -40°C to +85°C (with derating)
Storage Temperature ..........................................................-55°C ~ +105°C
Maximum Case Temperature........................................................... +100°C
Relative Humidity...................................................................5% to 95% RH
Temperature Coefficient................................................... ±0.02% / °C max.
(Complies with ETS300 132 part 4.4)
Input Surge Voltage (100ms max) ............... 12V input ...................36VDC
24V input ...................50VDC
48V input .................100VDC
Input Reflected Ripple Current (nominal Vin and FL) ...................40mAp-p
Thermal Impedance (See Note 6)
Start Up Time (nominal Vin and constant resistive load)
Natural Convection............................................................9.2°C / Watt
Heat-Sink with 20LFM .........................................................7.6°C/Watt
Heat-Sink with 500LFM .......................................................2.8°C/Watt
Power Up..................................................................................25ms typ.
Remote ON/OFF ......................................................................25ms typ.
Remote ON/OFF (See Note 1)
Thermal Shock .................................................................... MIL-STD-810D
Vibration ................................10~55Hz, 10G, 30 minutes along X, Y, and Z
MTBF (See Note 2) .............................................................. 1.398 x 106 hrs
PHYSICAL SPECIFICATIONS
DC-DC ON .......................................................Open or 3.5V < Vr < 12V
DC-DC OFF........................................................Short or 0V < Vr < 1.2V
Remote Off Input Current (nominal Vin) ...........................................2.5mA
OUTPUT SPECIFICATIONS
Output Voltage..............................................................................see table
Voltage Accuracy (nom Vin and full load)........................................... ±1%
Voltage Adjustability (See Note 1) ..................................................... ±10%
Output Current ..............................................................................see table
Output Power........................................................................ 40 watts max.
Line Regulation (LL to HL at FL)...................................................... ±0.5%
Load Regulation (10% to 100% FL)................................................. ±0.5%
Minimum Load ....................................................................................... 0%
Ripple/Noise (20MHz BW)............................................................see table
Transient Response Recovery Time (25% load step change)...........250us
PROTECTION 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
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
Over Voltage Protection....................... 1.5V Output ...........................3.9V
(Zener diode clamp)
1.8V Output ...........................3.9V
2.5V Output ...........................3.9V
3.3V Output ...........................3.9V
5V Output ..............................6.2V
12V Output .............................15V
15V Output .............................18V
Conducted Immunity
EN61000-4-6.................... Perf. Criteria A
Over Load Protection (% of FL at nominal input)...................... 150% max.
Short Circuit Protection....................................Hiccup, automatic recovery
Over Temperature Protection .................................................... 115°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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