CMMD Series
20 Watt Single Output
Rev. B
2:1 Wide Input Voltage Range
Chassis Mount DC/DC Converter
APPLICATIONS
FEATURES
● Measurement
● Output Current up to 6A
● Wireless Network
● 2:1 Wide Input Voltage Range
● Six-Sided Continuous Shielding
● 20 Watts Maximum Output Power
● Options: Negative Logic Remote ON/OFF
● Call Factory for More Output Power Options
● Compliant to RoHS EU Directive 2002/95/EC
● Telecom/Datacom
● Industry Control System
● Semiconductor Equipment
● CE Mark Meets 2006/95/EC, 93/68/EEC, and 89/336 EEC
● Chassis Mount Options: Open Frame, U Channel, and Enclosed Types Available
SPECIFICATIONS: CMMD Series
All specifications apply @ 25°C ambient unless otherwise noted
INPUT SPECIFICATIONS
GENERAL SPECIFICATIONS
Efficiency ........................................................................................see table
Switching Frequency .................................................................500KHz typ.
Isolation Voltage (Input to Output).........................................1600VDC min.
Isolation Voltage (Input to case)............................................1600VDC min.
Isolation Voltage (Output to Case) ........................................1600VDC min.
Isolation Resistance ...............................................................109 ohms min.
Isolation Capacitance .............................................................. 1000pF max.
Input Voltage Range ............ 12V nominal input.......................... 9-18VDC
24V nominal input........................ 18-36VDC
48V nominal input........................ 36-75VDC
Input Voltage Variation .................... dv/dt................................ 5V/ms 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 full load)...........20mAp-p
ENVIRONMENTAL SPECIFICATIONS
Start Up Time (nominal Vin and constant resistive load)
Power Up................................................................................10ms typ.
Remote ON/OFF ....................................................................10ms typ.
Operating Temperature ................................ -40°C ~ +85°C (with derating)
Storage Temperature ..........................................................-55°C ~ +105°C
Maximum Case Temperature............................................................. 100°C
Relative Humidity...................................................................5% to 95% RH
Remote ON/OFF (Note 6)
(Positive Logic)............... DC-DC ON................Open or 3V < Vr < 12V
DC-DC OFF.............Short or 0V < Vr < 1.2V
(Negative Logic) ............. DC-DC ON...............Short or 0V < Vr < 1.2V
DC-DC OFF..............Open or 3V < Vr < 12V
Thermal Impedance (Note 7)
Natural Convection.............................................................12°C / Watt
Natural Convection with Heat-Sink.....................................10°C / Watt
Input Current of Remote Control Pin (nominal Vin) ........-0.5mA ~ +0.5mA
Remote Off Input Current (nominal Vin) ...........................................2.5mA
Thermal Shock ..................................................................... MIL-STD-810F
Vibration ................................10~55Hz, 10G, 30 minutes along X, Y, and Z
MTBF (Note 1)..................................................................1.791 x 106 hours
OUTPUT SPECIFICATIONS
Output Voltage..............................................................................see table
Voltage Accuracy (nominal Vin and full load) ...................................... ±1%
Voltage Adjustability............................................................................. 10%
Output Current ..............................................................................see table
Output Power........................................................................ 20 watts max.
Line Regulation (LL to HL at FL)....................................................... ±0.2%
Load Regulation (no load to full load) ............................................... ±0.5%
Minimum Load ....................................................................................... 0%
PHYSICAL SPECIFICATIONS
Potting material of the DC/DC Converter ..........................Epoxy (UL94-V0)
Shielding of the DC/DC Converter.................................................. six-sided
Weight .............................................................................Approximately 6oz
Dimensions............................................ 4.00(L) x 2.25(W) x 0.81(H) inches
SAFETY & EMC
Approvals and Standards .................. IEC60950-1, UL60950-1, EN60950-1
Ripple/Noise (20 MHz BW)...........................................................see table
(measured with a 0.1uF/50V MLCC)
EMI .............................EN55022 ......................................................Class A
Air ± 8KV
ESD ....................EN61000-4-2……..
…….Perf. Criteria B
Temperature Coefficient ................................................. ±0.02% / °C max.
Transient Response Recovery Time (25% load step) .......................250us
Contact ± 6KV
Radiated Immunity......EN61000-4-3....................... 10V/m Perf. Criteria A
Fast Transient.............EN61000-4-4.........................±2KV Perf. Criteria B
Surge..........................EN61000-4-5.........................±1KV Perf. Criteria B
Conducted Immunity...EN61000-4-6.................... 10 Vrms Perf. Criteria A
PROTECTION SPECIFICATIONS
Over Voltage Protection........... 1.5, 1.8, 2.5, 3.3V outputs..................3.9V
(zener diode clamp)
5V output ........................................6.2V
12V output .........................................15V
15V output .........................................18V
Over Load Protection (% of full load at nominal input).............. 150% max.
Short Circuit Protection....................................Hiccup, automatic recovery
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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