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

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

DBW Series

Single and Dual Outputs

40 Watt DC/DC Converter

4:1 Ultra Wide Input Voltage Range

FEATURES

● High Efficiency up to 88%

● RoHS Directive Compliant

● Fixed Switching Frequency

● Six-Sided Continuous Shield

● 40 Watts Maximum Output power

● Single and Dual Outputs Available

● 4:1 Ultra Wide Input Voltage Range

● Standard 2.02” x 2.02” x 0.4” Package

SPECIFICATIONS: DBW 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

Under Voltage Lockout

24V nominal input........... DC-DC ON..........................................9 VDC

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

48V nominal input........... DC-DC ON........................................18 VDC

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

Input Filter ....................................................................................... Pi Type

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 FL) ...................20mAp-p

Start Up Time (nominal Vin and constant resistive load)

Power Up..............................................................................20ms max.

Remote ON/OFF ..................................................................20ms max.

Remote ON/OFF (See Note 4)

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

Remote Off Input Current (nominal Vin) ..............................................3mA

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)....................................................... ±0.2%

Load Regulation (See Note 2) ..................... Single Output............. ±0.5%

(min. load to 100% load)

Dual Output ................... ±1%

Load Cross Regulation (See Note 3) ........... Dual Output ................... ±5%

Minimum Load (See Note 8) .........................................................see table

Ripple/Noise (See Note 9) ............................................................see table

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.

GENERAL SPECIFICATIONS

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

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

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

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

Case Grounding (connect case to -Vin with decoupling Y cap) ........... TBD

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

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

ENVIRONMENTAL SPECIFICATIONS

Operating Ambient Temperature ............. -40°C to +55°C (without derating)

+55°C to +105°C (with derating)

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

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

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

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

Thermal Impedance (See Note 6)

Without Heat-Sink.............................................................. 9.2°C / Watt

With Heat-Sink..................................................................... 7.6°C/Watt

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

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

MTBF (See Note 5) ........Bellcore TR-NWT-000332............ 1.105 x 10

MIL-STD-217F ............................. 1.511 x 10

UL

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