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50 Watt DC/DC Power Converters

Wall Industries, Inc. • 37 Industrial Drive, Exeter, NH 03833 • Tel: 603-778-2300 • Toll Free: 888-597-9255 • Fax 603-778-9797 website: www.wallindustries.com • e-mail: sales@wallindustries.com Page 1 of 13 Standard Models Heatsink Models (Suffix “HS”)

FEATURES

  • RoHS & UL 94V-0 Compliant
  • Smallest Encapsulated 50W Converter
  • 4:1 Wide Input Voltage Ranges
  • Single Outputs
  • Remote ON/OFF Control
  • 1500VDC I/O Isolation
  • High Efficiency up to 92%
  • Under Voltage Lockout (UVLO)
  • No Minimum Load Requirements
  • Trimmable Output Voltage
  • Shielded Metal Case with Isolated Base-plate
  • Over Load, Short Circuit, Over Voltage, & Over Temperature Protection
  • -40°C to +80°C Operating Temperature Range
  • CSA/UL/IEC/EN 60950-1 Safety Approvals
  • Heatsink (Optional)

DESCRIPTION

The DHW50 series is the latest generation of high performance DC/DC converters setting a new standard concerning power density. These converters offer 50 Watts of continuous output power in a 2.0” x 1.0” x 0.43” encapsulated, shielded metal package. All models have a 2:1 wide input voltage range and a precisely regulated single output. Advanced circuit topology provides a very high efficiency up to 92% and an operating temperature range of -40°C to +80°C. Further features include remote on/off, trimmable output voltage, under voltage lockout as well as over load, over voltage, short circuit, and over temperature protection. These converters are RoHS compliant and are ideal for use in battery operated equipment, instrumentation, distributed power architectures in communication and industrial electronics and many other space critical applications. MODEL SELECTION TABLE Model Number Input Voltage Output Voltage Output Current Input Current Reflected Ripple Current Over Voltage Protection Output Power Efficiency Maximum Capacitive Load Min Max No Load Max Load DHW24S3.3-33

24 VDC

(9 - 36 VDC)

3.3 VDC 0mA 10A 80mA 1528mA

3.9 VDC 33W 90% 26,000µF

DHW24S5-50 5 VDC 0mA 10A 60mA 2290mA 6.2 VDC 50W 91% 17,000µF DHW24S12-50 12 VDC 0mA 4.17A 80mA 2267mA 15 VDC 50W 92% 3,000µF DHW24S15-50 15 VDC 0mA 3.33A 80mA 2263mA 18 VDC 50W 92% 2,000µF DHW24S24-50 24 VDC 0mA 2.08A 80mA 2286mA 30 VDC 50W 91% 750µF DHW48S3.3-33

48 VDC

(18 - 75 VDC)

3.3 VDC 0mA 10A 40mA 764mA

DHW48S5-50 5 VDC 0mA 10A 30mA 1145mA 6.2 VDC 50W 91% 17,000µF DHW48S12-50 12 VDC 0mA 4.17A 60mA 1134mA 15 VDC 50W 92% 3,000µF DHW48S15-50 15 VDC 0mA 3.33A 60mA 1134mA 18 VDC 50W 92% 2,000µF DHW48S24-50 24 VDC 0mA 2.08A 50mA 1143mA 30 VDC 50W 91% 750µF

Wall Industries, Inc. • 37 Industrial Drive, Exeter, NH 03833 • Tel: 603-778-2300 • Toll Free: 888-597-9255 • Fax 603-778-9797 website: www.wallindustries.com • e-mail: sales@wallindustries.com Page 2 of 13 SPECIFICATIONS: DHW50 SERIES All specifications are based on 25°C, Nominal Input Voltage, and Maximum Output Current unless otherwise noted. We reserve the right to change specifications based on technological advances. SPECIFICATION TEST CONDITIONS Min Typ Max Unit INPUT SPECIFICATIONS Input Voltage Range 24VDC nominal input models 9 24 36 VDC 48VDC nominal input models 18 48 75 Input Surge Voltage (100ms max.) 24VDC nominal input models -0.7 50 VDC 48VDC nominal input models -0.7 100 Start-up Threshold Voltage 24VDC nominal input models 9 VDC 48VDC nominal input models 18 Under Voltage Lockout (UVLO) 24VDC nominal input models 7.5 VDC 48VDC nominal input models 16 Start-up Time Nominal Vin and constant resistive load Power Up 30 ms Remote On/Off 30 Input Current See Table Reflected Ripple Current (Page 9) See Table Conducted EMI for EN55032 Class A and FCC level A compliance see page 1 Internal LC Filter Short Circuit Current Automatic Recovery Hiccup mode 0.3Hz typ. OUTPUT SPECIFICATIONS Output Voltage See Table Output Voltage Setting Accuracy At 50% load and nominal Vin ±1.0 %Vnom Line Regulation Low line to high line at full load ±0.5 % Load Regulation Minimum load to full load ±0.5 % Minimum Load No minimum load required Output Voltage Trim (Note 4) (Page 5) % of nominal output voltage 24VDC output models -10 +20 % Others -10 +10 Output Power See Table Output Current See Table Ripple & Noise (20MHz BW) (Page 9) Measured with a 1µF MLCC and a 10µF tantalum capacitor in parallel 3.3V & 5V output models 100 mVp-p 12V, 15V, & 24V output models 150 Transient Recovery Time (Note 1) 25% load step change 250 µs Transient Recovery Deviation (Note 1) 25% load step change ±3 ±5 % Temperature Coefficient ±0.02 %/°C PROTECTION Input Polarity Protection none Over Voltage Protection (page 9) See Table Over Current Protection Hiccup Current limitation at 150% typ. of Io max Thermal Protection Shutdown temperature 110 °C Short Circuit Protection Automatic recovery Hiccup Mode 0.3Hz typ. REMOTE ON/OFF (Page 9) Positive Logic Converter On 3.5V~12V or open circuit Converter Off 0V~1.2V or short circuit Control Input Current On Vctrl = 5.0V 0.5 mA Off Vctrl = 0V -0.5 Control Common Referenced to negative input Stand-by Input Current Nominal Vin 2.5 mA GENERAL Efficiency (see efficiency curves on pages 7~8) See Table Switching Frequency 285 KHz Isolation Voltage 60 seconds 1500 VDC 1 Second 1800 Isolation Resistance 500VDC 1000 MΩ Isolation Capacitance 100kHz, 1V 2200 pF Maximum Capacitive Load See Table

Wall Industries, Inc. • 37 Industrial Drive, Exeter, NH 03833 • Tel: 603-778-2300 • Toll Free: 888-597-9255 • Fax 603-778-9797 website: www.wallindustries.com • e-mail: sales@wallindustries.com Page 3 of 13 SPECIFICATIONS: DHW50 SERIES All specifications are based on 25°C, Nominal Input Voltage, and Maximum Output Current unless otherwise noted. We reserve the right to change specifications based on technological advances. SPECIFICATION TEST CONDITIONS Min Typ Max Unit ENVIRONMENTAL SPECIFICATIONS Operating Temperature (W/O Heatsink) (see derating curves on page 6) Natural air convection (20LFM) Nominal Vin and full load DHW24S3.3-33, DHW48S3.3-33 -40 +61 DHW24S12-50, DHW24S15-50, DHW48S12-50, DHW48S15-50 -40 +53 DHW24S5-50, DHW24S24-50, DHW48S5-50, DHW48S24-50 -40 +46 Operating Temperature (W/ Heatsink) (see derating curves on page 6) Natural air convection (20LFM) Nominal Vin and full load DHW24S3.3-33, DHW48S3.3-33 -40 +69 °C DHW24S12-50, DHW24S15-50, DHW48S12-50, DHW48S15-50 -40 +62 DHW24S12-40, DHW24S15-40 -40 +57 Thermal Impedance (W/O Heatsink) Natural convection (20LFM) 12.1 °C/W 100LFM convection 9.2 200LFM convection 7.8 400LFM convection 5.2 Thermal Impedance (W/ Heatsink) Natural convection (20LFM) 9.8 °C/W 100LFM convection 5.4 200LFM convection 4.5 400LFM convection 3.0 Case Temperature +105 °C Storage Temperature -50 +125 °C Humidity (non-condensing) 95 % RH RFI Six-sided shielded metal case Cooling Natural convection is about 20LFM and is not still air (0LFM) natural convection Lead Temperature 1.5mm from case for 10 seconds 260 °C MTBF (calculated) MIL-HDBK-217F at 25°C, Ground Benign 230,900 hours PHYSICAL SPECIFICATIONS Weight 1.2oz (34g) Dimensions (L x W x H) 2.00 x 1.00 x 0.43 inches (50.8 x 25.4 x 11.0 mm) Case Material Aluminum alloy, black anodized coating Base Material FR4 PCB (flammability to UL 94V-0 rated) Potting Material Epoxy (UL94-V0) Pin Material Copper alloy with gold plate over nickel sub-plate Heatsink (optional) “HS” suffix See page 4 SAFETY & EMC Safety Approvals UL/cUL 60950-1 recognition (CSA certificate) IEC/EN 60950-1 (CB-scheme) EMI Conduction, EN55032, FCC part 15 Class A ESD EN61000-4-2 Air: ±8KV, Contact±6KV A Radiated Immunity EN61000-4-3 10V/m A Fast Transient (See Note 5) EN61000-4-4 ±2KV A Surge (See Note 5) EN61000-4-5 ±1KV A Conducted Immunity EN61000-4-6 10V/m A NOTES 1. Transient recovery time is measured to within 1% error band for a step change in output load from 75% to 100%. 2. We recommend protecting the converter by a slow blow fuse in the input supply line. 3. To order the converter with a heatsink, please add the suffix “HS” to the model number. (Ex: DHW24S12-50HS) 4. Do not exceed maximum power specification when adjusting the output voltage. 5. The DHW50 series can meet EN61000-4-4 & EN61000-4-5 by adding a capacitor across the input pins. Capacitor: 220uF/100V 6. Other input and output voltages may be available; please call factory for ordering details.

Wall Industries, Inc. • 37 Industrial Drive, Exeter, NH 03833 • Tel: 603-778-2300 • Toll Free: 888-597-9255 • Fax 603-778-9797 website: www.wallindustries.com • e-mail: sales@wallindustries.com Page 4 of 13 MECHANICAL DRAWINGS Standard Models Heatsink Models (“HS” Suffix)

Wall Industries, Inc. • 37 Industrial Drive, Exeter, NH 03833 • Tel: 603-778-2300 • Toll Free: 888-597-9255 • Fax 603-778-9797 website: www.wallindustries.com • e-mail: sales@wallindustries.com Page 5 of 13 OUTPUT VOLTAGE ADJUSTMENT Output voltage trim allows the user to increase or decrease the output voltage of a module. This is accomplished by connecting an external resistor between the Trim pin and either the +Vout or –Vout pins. With an external resistor between the Trim and –Vout pins, the output voltage increases. With an external resistor between the Trim and +Vout pins, the output voltage set-point decreases. Trim Up Trim Down DHWXXS3.3-33 DHWXXS5-50 Trim Vout,up Rup Trim Vout,up Rup 1% 3.333V 70.50kΩ 1% 5.050V 36.57kΩ 2% 3.366V 29.28kΩ 2% 5.100V 16.58kΩ 3% 3.399V 16.87kΩ 3% 5.150V 9.92kΩ 4% 3.432V 10.90kΩ 4% 5.200V 6.59kΩ 5% 3.465V 7.38kΩ 5% 5.250V 4.59kΩ 6% 3.498V 5.06kΩ 6% 5.300V 3.25kΩ 7% 3.531V 3.42kΩ 7% 5.350V 2.30kΩ 8% 3.564V 2.20kΩ 8% 5.400V 1.59kΩ 9% 3.597V 1.25kΩ 9% 5.450V 1.03kΩ 10% 3.630V 0.49kΩ 10% 5.500V 0.59kΩ DHWXXS12-50 DHWXXS15-50 Trim Vout,up Rup Trim Vout,up Rup 1% 12.120V 368.92kΩ 1% 15.150V 392.98kΩ 2% 12.240V 161.92kΩ 2% 15.300V 182.12kΩ 3% 12.360V 94.97kΩ 3% 15.450V 108.73kΩ 4% 12.480V 61.86kΩ 4% 15.600V 71.43kΩ 5% 12.600V 42.12kΩ 5% 15.750V 48.85kΩ 6% 12.720V 29.00kΩ 6% 15.900V 33.71kΩ 7% 12.840V 19.66kΩ 7% 16.050V 22.86kΩ 8% 12.960V 12.66kΩ 8% 16.200V 14.69kΩ 9% 13.080V 7.23kΩ 9% 16.350V 8.33kΩ 10% 13.200V 2.89kΩ 10% 16.500V 3.23kΩ DHWXXS24-50 Trim Vout,up Rup 2% 24.480V 247.2kΩ 4% 24.960V 109.255kΩ 6% 25.440V 63.38kΩ 8% 25.920V 39.025kΩ 10% 26.400V 27.52kΩ 12% 26.880V 18.39kΩ 14% 27.360V 11.77kΩ 16% 27.840V 7.29kΩ 18% 28.320V 3.308kΩ 20% 28.800V 0.3658kΩ DHWXXS3.3-33 DHWXXS5-50 Trim Vout,down Rdown Trim Vout,down Rdown 1% 3.267V 63.59kΩ 1% 4.950V 45.53kΩ 2% 3.234V 30.28kΩ 2% 4.900V 20.61kΩ 3% 3.201V 18.19kΩ 3% 4.850V 12.31kΩ 4% 3.168V 11.95kΩ 4% 4.800V 8.15kΩ 5% 3.135V 8.13kΩ 5% 4.750V 5.66kΩ 6% 3.102V 5.56kΩ 6% 4.700V 4.00kΩ 7% 3.069V 3.70kΩ 7% 4.650V 2.81kΩ 8% 3.036V 2.31kΩ 8% 4.600V 1.92kΩ 9% 3.003V 1.21kΩ 9% 4.550V 1.23kΩ 10% 2.970V 0.34kΩ 10% 4.500V 0.68kΩ DHWXXS12-50 DHWXXS15-50 Trim Vout,down Rdown Trim Vout,down Rdown 1% 11.880V 394.50kΩ 1% 14.850V 572.67kΩ 2% 11.760V 179.74kΩ 2% 14.700V 248.63kΩ 3% 11.640V 106.08kΩ 3% 14.550V 145.60kΩ 4% 11.520V 68.86kΩ 4% 14.400V 94.97kΩ 5% 11.400V 46.39kΩ 5% 14.250V 64.87kΩ 6% 11.280V 31.36kΩ 6% 14.100V 44.92kΩ 7% 11.160V 20.60kΩ 7% 13.950V 30.72kΩ 8% 11.040V 12.51kΩ 8% 13.800V 20.10kΩ 9% 10.920V 6.21kΩ 9% 13.650V 11.86kΩ 10% 10.800V 1.17kΩ 10% 13.500V 5.28kΩ DHWXXS24-50 Trim Vout,down Rdown 1% 23.760V 318.05kΩ 2% 23.520V 146.05kΩ 3% 23.280V 85.8kΩ 4% 23.040V 55.51kΩ 5% 22.800V 37.415kΩ 6% 22.560V 25.625kΩ 7% 22.320V 16.515kΩ 8% 22.080V 9.81kΩ 9% 21.840V 4.9785kΩ 10% 21.600V 0.9185kΩ

Wall Industries, Inc. • 37 Industrial Drive, Exeter, NH 03833 • Tel: 603-778-2300 • Toll Free: 888-597-9255 • Fax 603-778-9797 website: www.wallindustries.com • e-mail: sales@wallindustries.com Page 6 of 13 DERATING CURVES Without Heatsink With Heatsink DHW24S3.3-33 & DHW48S3.3-33 DHW24S3.3-33 & DHW48S3.3-33 DHW24S12-50, DHW24S15-50, DHW48S12-50, DHW48S15-50 DHW24S12-50, DHW24S15-50, DHW48S12-50, DHW48S15-50 DHW24S5-50, DHW24S24-50, DHW48S5-50, DHW48S24-50 DHW24S5-50, DHW24S24-50, DHW48S5-50, DHW48S24-50

Wall Industries, Inc. • 37 Industrial Drive, Exeter, NH 03833 • Tel: 603-778-2300 • Toll Free: 888-597-9255 • Fax 603-778-9797 website: www.wallindustries.com • e-mail: sales@wallindustries.com Page 7 of 13 EFFICIENCY CURVES 24VDC NOMINAL INPUT MODELS DHW24S3.3-33 Efficiency vs Load Current DHW24S5-50 Efficiency vs Load Current DHW24S12-50 Efficiency vs Load Current DHW24S15-50 Efficiency vs Load Current DHW24S24-50 Efficiency vs Load Current

Wall Industries, Inc. • 37 Industrial Drive, Exeter, NH 03833 • Tel: 603-778-2300 • Toll Free: 888-597-9255 • Fax 603-778-9797 website: www.wallindustries.com • e-mail: sales@wallindustries.com Page 8 of 13 EFFICIENCY CURVES 48VDC NOMINAL INPUT MODELS DHW48S3.3-33 Efficiency vs Load Current DHW48S5-50 Efficiency vs Load Current DHW48S12-50 Efficiency vs Load Current DHW48S15-50 Efficiency vs Load Current DHW48S24-50 Efficiency vs Load Current

Wall Industries, Inc. • 37 Industrial Drive, Exeter, NH 03833 • Tel: 603-778-2300 • Toll Free: 888-597-9255 • Fax 603-778-9797 website: www.wallindustries.com • e-mail: sales@wallindustries.com Page 9 of 13 EUT Operating Modes of EUT and Determination of Worst Case Operating Mode Test modes presented in report below. Conducted & Radiated Emission Test Mode Model No. Input Output 1 DHW12S3.3-33 12VDC 3.3VDC

2 DHW24S24-50 24VDC 24VDC

3 DHW48S24-50 48VDC 24VDC

4 DHW48S3.3-33 48VDC 3.3VDC Immunity Tests Mode Model No. Input Output Test Program Used and Operation Description Emission Test: Set the EUT under full resistor load. Immunity Tests: Connected a resistor load to DC output port of EUT to make EUT have maximum power consumption and a multimeter was used to monitor voltage of output. Primary Clock Frequencies of Internal Source The highest frequency generated or used within the EUT or on which the EUT operates or tunes is below 108MHz, provided by factory, for detailed internal source, please refer to manufacturers specifications. EMI FILTER Conduction & Radiation Solution Class Model L1 C1 C2 C3, C4 Class A DHW50 Series 1mH//1mH 7448031501 3.3µF/100V 1210 X7S MLCC 4.7µF/100V 1210 X7S MLCC 1000pF/2kV 1206 X7R MLCC EFT & Surge Solution: To meet EN61000-4-4 & EN61000-4-5, an external capacitor across the input pins is required. Suggested capacitor: 330uF/100V.

Wall Industries, Inc. • 37 Industrial Drive, Exeter, NH 03833 • Tel: 603-778-2300 • Toll Free: 888-597-9255 • Fax 603-778-9797 website: www.wallindustries.com • e-mail: sales@wallindustries.com Page 10 of 13 RADIATION REPORT Radiation Class A Report Limit Line: EN55032 Class A Polarity: Horizontal Limit Line: EN55032 Class A Polarity: Vertical

Wall Industries, Inc. • 37 Industrial Drive, Exeter, NH 03833 • Tel: 603-778-2300 • Toll Free: 888-597-9255 • Fax 603-778-9797 website: www.wallindustries.com • e-mail: sales@wallindustries.com Page 11 of 13 TEST SETUP Input Reflected-Ripple Current Test Setup Input reflected-ripple current is measured with an inductor Lin (4.7µH) and Cin (220µF, ESR < 1.0Ω at 100 KHz) to simulate source impedance. Capacitor Cin offsets possible battery impedance. Current ripple is measured at the input terminals of the module. Measurement bandwidth is 0-500 KHz. Peak-to-Peak Output Noise Measurement Test Use a 1µF ceramic capacitor and a 10µF tantalum capacitor. Scope measurement should be made by using a BNC socket, measurement bandwidth is 0-20MHz. Position the load between 50mm and 75mm from the DC/DC converter. DESIGN & FEATURE CONSIDERATIONS Remote On/Off Positive logic remote on/off turns the module on during a logic high voltage on the remote on/off pin and off during a logic low. To turn the module on and off, the user must supply a switch to control the voltage between the on/off terminal and the –Vin maximum sink current at on/off terminal (Pin 3) during a logic low is -100µA. Over Current Protection To provide protection in a fault (output overload) condition, the unit is equipped with internal current limiting circuitry and can endure overload for an unlimited duration. Over Voltage Protection The output over voltage clamp consists of control circuitry which is independent of the primary regulation loop that monitors the voltage on the output terminals. The control loop of the clamp has a higher voltage set point than the primary loop. This provides a redundant voltage control that reduces the risk of output over voltage. The OVP level can be found in the model selection table. Output Ripple Reduction A good quality low ESR capacitor placed as close as possible across the load will give the best ripple and noise performance. To reduce output ripple, it is recommended to use 4.7µF capacitors at the output.

Wall Industries, Inc. • 37 Industrial Drive, Exeter, NH 03833 • Tel: 603-778-2300 • Toll Free: 888-597-9255 • Fax 603-778-9797 website: www.wallindustries.com • e-mail: sales@wallindustries.com Page 12 of 13 Input Source Impedance The power module should be connected to a low ac-impedance input source. Highly inductive source impedances can affect the stability of the power module. In applications where power is supplied over long lines and output loading is high, it may be necessary to use a capaci tor at the input to ensure startup. A Capacitor mounted close to the power module helps ensure stability of the unit, it is recommended to use a good quality low Equivalent Series Resistance (ESR < 1.0Ω at 100KHz) capacitor of a 10µF for the 24V and 48V devices. Maximum Capacitive Load The DHW50 series has a limitation of maximum connected capacitance on the output. The power module may be operated in current limiting mode during start-up, affecting the ramp-up and the start-up time. The maximum capacitance can be found in the model selection table. Thermal Considerations Many conditions affect the thermal performance of the power module, such as orientation, airflow over the module, and board spacing. To avoid exceeding the maximum temperature rating of the components inside the power module, the case temperature must be kept below 105°C. The derating curves are determined from measurements obtained in a test setup. MODEL NUMBER SETUP DHW 24 S 12 - 50 HS Series Name Input Voltage Output Quantity Ouptut Voltage Output Power Heatsink 24: 9-36 VDC S: Single Output 3.3: 3.3 VDC 33: 33 Watts None: No Heatsink 48: 18-75 VDC 5: 5 VDC 50: 50 Watts HS: Heatsink 12: 12 VDC 15: 15 VDC 24: 24 VDC

Wall Industries, Inc. • 37 Industrial Drive, Exeter, NH 03833 • Tel: 603-778-2300 • Toll Free: 888-597-9255 • Fax 603-778-9797 website: www.wallindustries.com • e-mail: sales@wallindustries.com Page 13 of 13 COMPANY INFORMATION Wall Industries, Inc. has created custom and modified units for over 50 years. Our in- house research and development engineers will provide a solution that exceeds your performance requirements on- time and on budget. Our ISO9001-2008 certification is just one example of our commitment to producing a high quality, well-documented product for our customers. Our past projects demonstrate our commitment to you, our customer. Wall Industries, Inc. has a reputation for working closely with its customers to ensure each solution meets or exceeds form, fit and function requirements. We will continue to provide ongoing support for your project above and beyond the design and production phases. Give us a call today to disc uss your future projects. Contact Wall Industries for further information: Phone: (603)778-2300 Toll Free: (888)597-9255 E-mail: sales@wallindustries.com Web: www.wallindustries.com Address: 37 Industrial Drive Exeter, NH 03833