Wall Industries, Inc. 5 Watson Brook Road Exeter, NH 03833

603-778-2300 www.wallindustries.com Fax 603-778-9797

CMMDW Series

20 Watt Single Output

Chassis Mount DC/DC Converter

4:1 Ultra Wide Input Voltage Range

Rev B

FEATURES

● Output Current up to 5.5A

● Fixed Switching Frequency

● Six-Sided Continuous Shielding

● 20 Watts Maximum Output Power

● 4:1 Ultra Wide Input Voltage Range

● Options: Negative Logic Remote ON/OFF

● Call Factory for More Output Power Options

● Compliant to RoHS EU Directive 2002/95/EC

● 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: CMMDW Series

All specifications apply @ 25°C ambient unless otherwise noted

INPUT SPECIFICATIONS

Input Voltage Range ............ 24V nominal input .......................... 9-36VDC

48V nominal input ........................ 18-75VDC

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

Input Reflected Ripple Current (nominal Vin and full load) ...........20mAp-p

Start Up Time (nominal Vin and constant resistive load)

Power Up................................................................................20ms typ.

Remote ON/OFF ....................................................................20ms typ.

Start Up Voltage................... 24V input.............................................9 VDC

48V input...........................................18 VDC

Shutdown Voltage................ 24V input .........................................7.5 VDC

48V input ..........................................15 VDC

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

Input Current of Remote Control Pin (nominal Vin) ........ -0.5mA ~ +0.5mA

Remote Off Input Current (nominal Vin) ...........................................2.5mA

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%

Ripple/Noise (20 MHz BW) ...........................................................see table

(measured with a 0.1uF/50V MLCC)

Transient Response Recovery Time (25% load step) .......................250us

PROTECTION SPECIFICATIONS

Over Voltage Protection........... 3.3V output ........................................ 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% typ.

Short Circuit Protection. ...................................Hiccup, automatic recovery

GENERAL SPECIFICATIONS

Efficiency ........................................................................................see table

Switching Frequency .................................................................400KHz typ.

Isolation Voltage (Input to Output)......................................... 1600VDC min.

Isolation Voltage (Input to case) ............................................ 1600VDC min.

Isolation Voltage (Output to Case) ........................................ 1600VDC min.

Isolation Resistance ...............................................................10

Isolation Capacitance .............................................................. 1500pF max.

ENVIRONMENTAL SPECIFICATIONS

Operating Temperature ................................. -40°C ~ +66°C (w/o derating)

+66°C ~ +105°C (w/ derating)

Storage Temperature .......................................................... -55°C ~ +125°C

Maximum Case Temperature ............................................................. 105°C

Relative Humidity...................................................................5% to 95% RH

Thermal Impedance (Note 7)

Natural Convection ............................................................. 12°C / Watt

Natural Convection with Heat-Sink..................................... 10°C / Watt

Thermal Shock ..................................................................... MIL-STD-810F

Temperature Coefficient ................................................... ±0.02% / °C max.

Vibration ................................10~55Hz, 10G, 30 minutes along X, Y, and Z

MTBF (Note 1)............BELLCORE TR-NWT-000332..........1.691 X 10

MIL-STD-217F ................................. 5.629 x 10

PHYSICAL SPECIFICATIONS

Potting material of the DC/DC Converter ..........................Epoxy (UL94-V0)

Shielding of the DC/DC Converter.................................................. six-sided

Weight ............................................................................Approximately 6 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

EMI .............................EN55022 ...................................................... Class A

ESD ....................EN61000-4-2……..

…….Perf. Criteria B

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

Due to advances in technology, specifications subject to change without notice

APPLICATIONS

● Measurement

● Wireless Network

● Telecom/Datacom

● Industry Control System

● Semiconductor Equipment

Air ± 8KV

Contact ± 6KV