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

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

CMDB Series

40 Watt Single Output

2:1 Input Voltage Range

Chassis Mount DC/DC Converter

Rev. B

FEATURES

● High Efficiency up to 90%

● Fixed Switching Frequency

● Six-Sided Continuous Shield

● 2:1 Wide Input Voltage Range

● International Safety Standard Approval

● Call Factory for More Output Power Options

● 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

Input Voltage Range ............ 12V nominal input .......................... 9-18VDC

24V nominal input ........................ 18-36VDC

48V nominal input ........................ 36-75VDC

Under Voltage Lockout

12V nominal input............. DC-DC ON...........................................9VDC

DC-DC OFF .........................................8VDC

24V nominal input............. DC-DC ON......................................17.8VDC

DC-DC OFF .......................................16VDC

48V nominal input............. DC-DC ON.........................................36VDC

DC-DC OFF .......................................34VDC

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 FL) ...................40mAp-p

Start Up Time (nominal Vin and constant resistive load)

Power Up..................................................................................25ms typ.

Remote ON/OFF ......................................................................25ms typ.

Remote ON/OFF (See Note 1)

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

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

Over Load Protection (% of FL at nominal input)...................... 150% max.

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

Over Temperature Protection .................................................... 115°C typ.

GENERAL SPECIFICATIONS

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

Switching Frequency .................................................................300KHz typ.

Isolation Voltage

Input to Output ................................................................... 1600VDC min.

Input to Case ..................................................................... 1600VDC min.

Output to Case................................................................... 1600VDC min.

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

Isolation Capacitance .............................................................. 1000pF max.

ENVIRONMENTAL SPECIFICATIONS

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.

Thermal Impedance (See Note 6)

Natural Convection ............................................................ 9.2°C / Watt

Heat-Sink with 20LFM ......................................................... 7.6°C/Watt

Heat-Sink with 500LFM ....................................................... 2.8°C/Watt

Thermal Shock .................................................................... MIL-STD-810D

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

MTBF (See Note 2) .............................................................. 1.398 x 10

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

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

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

UL E155800

TUV

CB

CE MARK