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Wall Industries, Inc. 5 Watson Brook Road Exeter, NH 03833 603-778-2300 www.wallindustries.com Fax 603-778-9797 MSKW Series

5 Watt DC/DC Converter

2:1 Wide Input Voltage Range Rev A

FEATURES

  • SMT Technology
  • High Power Density
  • Efficiency up to 85%
  • 1500VDC I/O Isolation
  • Short Circuit Protection
  • Remote ON/OFF Control
  • MTBF > 1,000,000 Hours
  • Industry Standard Pin-out
  • 2:1 Wide Input Voltage Range
  • EMI Complies with EN55022 Class A
  • Operating Temperature: -40°C to +71°C SPECIFICATIONS: MSKW 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 Nom Max Unit INPUT (Vin) 12V nominal input models 9 12 18 24V nominal input models 18 24 36 Input Voltage Range 48V nominal input models 36 48 75 VDC 12V nominal input models 7.5 8 9 24V nominal input models 14 16 18 Start Voltage 48V nominal input models 30 33 36 VDC 12V nominal input models 6.5 7 8 24V nominal input models 13 15 17 Under Voltage Shutdown 48V nominal input models 28 31 34 VDC 12V nominal input models -0.7 25 24V nominal input models -0.7 50 Input Surge Voltage (1000ms) 48V nominal input models -0.7 100 VDC Reverse Polarity Input Current All models 1 A Input Filter All models Pi Filter Reflected Ripple Current See Rating Chart Short Circuit Input Power All models 1000 3000 mW OUTPUT (Vo) Output Voltage See Rating Chart Output Voltage Accuracy ±0.5 ±1.0 % Output Voltage Balance Dual Output, Balanced Loads ±0.5 ±2.0 % Load Regulation Io = 20% to 100% ±0.3 ±1.0 Line Regulation Vin = min. to max. ±0.1 ±0.3 % Output Power 5 W Output Current See Rating Chart Ripple & Noise (20MHz) 50 85 mVpk-pk Ripple & Noise (20MHz) Over Line, Over Load, and Over Temperature 100 mVpk-pk Ripple & Noise (20MHz) 15 mVrms Transient Response Deviation 25% Load Step Change ±2 ±6 % Transient Recovery Time 25% Load Step Change 250 500 µs REMOTE ON/OFF CONTROL Supply On 2.5 to 5.5VDC or open circuit Supply Off -0.7 0.8 VDC Device Standby Input Current 10 mA Control Input Current (ON) Vin = min to max -200 µA Control Input Current (OFF) Vin = min to max -300 µA Control Common Referenced to negative input PROTECTION Short Circuit Protection continuous Over Power Protection 115 140 165 % 12V nominal input models 1500mA slow-blow type 24V nominal input models 700mA slow-blow type Input Fuse Recommendation 48V nominal input models 350mA slow-blow type GENERAL Efficiency See Rating Chart Switching Frequency 200 260 350 KHz Isolation Voltage Rated 60 seconds 1500 VDC Isolation Voltage Test Flash Test for 1 second 1650 VDC Isolation Resistance 500VDC 1000 MΩ Isolation Capacitance 100KHz, 1V 650 750 pF Internal Power Dissipation 2500 mW Max. Capacitive Load See Rating Chart

DESCRIPTION

The MSKW series of DC/DC converters provide a maximum of 5 watts in a “gull-wing” SMT package. These converters operate over 2:1 wide input voltage ranges of 9-18, 18-36, or 36-75VDC. This series also has single output voltages of 3.3, 5, 12, and 15VDC and dual output voltages of ±5, ±12, and ±15VDC. These converters have a typical full load efficiency of 85%, remote ON/OFF, and continuous short circuit protection. The -40°C~+71°C operating temperature make these converters ideal for data communication equipment, mobile battery driven equipment, process/machine control equipment, telecommunication equipment, computer peripheral systems, distributed power systems, mixed analog/digital subsystems, and industrial robot systems. The EN55022 Class A conducted noise compliance minimizes design time, cost, and eliminates the need for external filter components.

Wall Industries, Inc. 5 Watson Brook Road Exeter, NH 03833 603-778-2300 www.wallindustries.com Fax 603-778-9797 MSKW Series 2:1 Wide Input Voltage Range Rev A SPECIFICATIONS (CONTINUED) 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 Nom Max Unit ENVIRONMENTAL Operating Temperature (Ambient) -40 +71 °C Operating Temperature (Case) -40 +90 °C Storage Temperature -40 +125 °C Lead Temperature 1.5mm from case for 10 seconds 260 °C Humidity 95 % Cooling Free air convection Temperature Coefficient ±0.01 ±0.02 %/°C Moisture Sensitivity Level (MSL) Temperature IPC/JEDEC J-STD-20 Level 2 MTBF MIL-HDBK-217F @ 25°C, Ground Benign 1000 Khours Conducted EMI EN55022 Class A PHYSICAL Weight 14 grams Dimensions (L x W x H) 1.31 x 0.81 x 0.40 inches 33.4 x 20.6 x 10.2 mm Case Material Non-conductive black plastic Flammability UL94V-0 OUTPUT VOLTAGE / CURRENT RATING CHARTS SINGLE OUTPUT MODELS Output Current Input Current Model Number Input Voltage Output Voltage Min Max No Load Max Load Reflected Ripple Current Efficiency (Typ) Maximum Capacitive Load MSKW12S33W4 3.3 VDC 120mA 1200mA 434mA 76% 680µF MSKW12S5W5 5 VDC 100mA 1000mA 521mA 80% 680µF MSKW12S12W5 12 VDC 41.7mA 417mA 502mA 83% 680µF MSKW12S15W5

12 VDC

(9 ~ 18 VDC) 15 VDC 33.3mA 333mA 45mA 502mA 25mA 83% 680µF MSKW24S33W4 3.3 VDC 120mA 1200mA 212mA 78% 680µF MSKW24S5W5 5 VDC 100mA 1000mA 254mA 82% 680µF MSKW24S12W5 12 VDC 41.7mA 417mA 245mA 85% 680µF MSKW24S15W5

24 VDC

(18 ~ 36 VDC) 15 VDC 33.3mA 333mA 15mA 245mA 15mA 85% 680µF MSKW48S33W4 3.3 VDC 120mA 1200mA 106mA 78% 680µF MSKW48S5W5 5 VDC 100mA 1000mA 127mA 82% 680µF MSKW48S12W5 12 VDC 41.7mA 417mA 123mA 85% 680µF MSKW48S15W5

48 VDC

(36 ~ 75 VDC) 15 VDC 33.3mA 333mA 6mA 122mA 10mA 85% 680µF DUAL OUTPUT MODELS Output Current Input Current Model Number Input Voltage Output Voltage Min Max No Load Max Load Reflected Ripple Current Efficiency (Typ) Maximum Capacitive Load MSKW12D5W5 ±5 VDC ±50mA ±500mA 521mA 80% 100µF MSKW12D12W5 ±12 VDC ±20.8mA ±208mA 501mA 83% 100µF MSKW12D15W5 (9 ~ 18 VDC) ±15 VDC ±16.7mA ±167mA 45mA 503mA 25mA 83% 100µF MSKW24D5W5 ±5 VDC ±50mA ±500mA 254mA 82% 100µF MSKW24D12W5 ±12 VDC ±20.8mA ±208mA 245mA 85% 100µF MSKW24D15W5 (18 ~ 36 VDC) ±15 VDC ±16.7mA ±167mA 15mA 246mA 15mA 85% 100µF MSKW48D5W5 ±5 VDC ±50mA ±500mA 127mA 82% 100µF MSKW48D12W5 ±12 VDC ±20.8mA ±208mA 122mA 85% 100µF MSKW48D15W5 (36 ~ 75 VDC) ±15 VDC ±16.7mA ±167mA 6mA 123mA 10mA 85% 100µF NOTES 1. Transient recovery time is measured to within 1% e rror band for a step change in output load of 75% to 100%. 2. The MSKW series requires a minimum output loading to maintain specified regulations. Operation under no-load conditions will not damage these devices, however they may not meet all listed specifications. 3. All DC/DC converters should be externally fused at the front end for protection. 4. Other input and output voltages may be available, please contact factory. 5. It is not recommended to use the water-washing process on SMT units.

Wall Industries, Inc. 5 Watson Brook Road Exeter, NH 03833 603-778-2300 www.wallindustries.com Fax 603-778-9797 MSKW Series 2:1 Wide Input Voltage Range Rev A BLOCK DIAGRAMS Single Output Dual Output INPUT VOLTAGE TRANSIENT RATING DERATING CURVE

Wall Industries, Inc. 5 Watson Brook Road Exeter, NH 03833 603-778-2300 www.wallindustries.com Fax 603-778-9797 MSKW Series 2:1 Wide Input Voltage Range Rev A Efficiency vs Input Voltage (Single Output) Efficiency vs Input Voltage (Dual Output) Efficiency vs Output Load (Single Output) Efficiency vs Output Load (Dual Output)

Wall Industries, Inc. 5 Watson Brook Road Exeter, NH 03833 603-778-2300 www.wallindustries.com Fax 603-778-9797 MSKW Series 2:1 Wide Input Voltage Range Rev A MECHANICAL DRAWING Unit: mm [inches] PIN CONNECTIONS PIN Single Output Dual Output

1 Remote On/Off Remote On/Off

9 NC Common

10 NC NC

11 NC -Vout

12 NC NC

13 NC NC

15 NC NC

24 NC NC

NC: No Connection X.XX±0.13 [X.XXX±0.005] CONNECTING PIN PATTERNS Top View (2.54mm / 0.1 inch grids)

Wall Industries, Inc. 5 Watson Brook Road Exeter, NH 03833 603-778-2300 www.wallindustries.com Fax 603-778-9797 MSKW Series 2:1 Wide Input Voltage Range Rev A DESIGN & FEATURE CONSIDERATONS Over Current Protection To provide protection in a fault (output over load) condition the unit is equipped with internal current limiting circuitry and can endure current limiting for an unlimited duration. At the point of current limit inception the unit shifts from voltage control to current control. The unit operates normally once the output current is brought back to its specified range. Input Source / Remote On/Off Positive logic remote on/off turns the module ON during a logic high voltage on the remote on/off pin, and turns the module OFF during a logic low voltage on the remote on/off pin. To turn the power module ON and OFF, the user must supply a switch to control the voltage between the on/off terminal and the -Vin terminal. The switch can be an open collector or equivalent. A logic low is –0.7V to 0.8V. A logic high is 2.5V to 5.5V. The maximum sink current of the switch at the on/off terminal during a logic low is 300µA. The maximum sink current of the switch at the on/off terminal = 2.5 to 5.5V is 200µA or open. 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 capacitor 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 3.3µF for the 12V input models and a 2.2µF for the 24V and 48V input models. +Out -Out +Vin -Vin DC / DC Converter LoadDC Power Source Cin Maximum Capacitive Load The MSKW series has a limit of maximum connected capacitance at the output. The power module may be operated in current limiting mode during start-up, affecting the ramp-up and the startup time. For optimal performance we recommend 100µF maximum capacitive load for dual outputs and 680µF capacitive load for single outputs. The maximum capacitance can be found in the Output Voltage / Current Rating Chart. TEST CONFIGURATIONS 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 100KHz) to simulate source impedance. +Out -Out +Vin -Vin DC / DC Converter Load Battery + Lin+ Cin To Oscilloscope Current Probe Capacitor Cin offsets possible battery impedance. Current ripple is measured at the input terminals of the module. Measurement bandwidth is 0 ~ 500KHz.

Wall Industries, Inc. 5 Watson Brook Road Exeter, NH 03833 603-778-2300 www.wallindustries.com Fax 603-778-9797 MSKW Series 2:1 Wide Input Voltage Range Rev A Peak-to-Peak Output Noise Measurement Test Use a Cout 0.47µF ceramic 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. +Out -Out +Vin -Vin Single Output DC / DC Converter Resistive LoadScope Copper Strip Cout +Out -Out +Vin -Vin Dual Output DC / DC Converter Resistive Load Scope Copper Strip Cout Com. ScopeCout 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 3.3µF capacitors at the output. +Out -Out +Vin -Vin Load DC Power Source Cout Single Output DC / DC Converter +Out -Out +Vin -Vin Load DC Power Source CoutCom. Dual Output DC / DC Converter 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 90°C. The derating curves are determined from measurements obtained in an experimental apparatus. DUT Position of air velocity probe and thermocouple 50mm / 2in Air Flow 15mm / 0.6in COMPANY INFORMATION: Wall Industries, Inc. has created custom and modified units for over 40 years. Our in-house research and development engineers will provide a solution that exceeds your performance requirements on time and on budget. Our ISO9001-2000 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 discuss your future projects. Contact Wall Industries for further information: Phone: (603)778-2300 Toll Free: (888)587-9255 Fax: (603)778-9797 E-mail: sales@wallindustries.com Web: www.wallindustries.com Address: 5 Watson Brook Rd. Exeter, NH 03833