DCMSW1 SERIES 1 Watt DC/DC Power Converters Rev A FEATURES • 1 Watt Output Power • 2:1 Wide Input Voltage Range • 1500VDC I/O Isolation • -40°C to +85°C Operating Temperature • Low Ripple & Noise • Continuous Short Circuit Protection • Remote ON/OFF Control • Ultra Compact SMT Package • Fully Regulated Single & Dual Outputs • Qualified for Lead-free Reflow Process • MTBF > 2,800,000 Hours • CSA/UL/IEC/EN 60950-1 Safety Approvals (Pending) DESCRIPTION Size: 0.74 x 0.54 x 0.33 inches (4.5g) 18.9 x 13.7 x 8.45 mm Weight: 0.16oz The DCMSW1 series of DC/DC converters provides 1 Watt of output power in an ultra compact SMT package. These converters operate over 2:1 input voltage ranges of 4.5-9VDC, 9-18VDC, 18-36VDC, and 36-75VDC. This series also has fully regulated single and dual output voltages of 5V, 12V, 15V, ±12V, and ±15V. The DCMSW1 series’ impressive efficiencies enable these modules to deliver their fully rated output power from –40°C to +75°C without derating. Other features include remote on/off control, low ripple and noise, 1500VDC I/O isolation, and continuous short circuit protection. The very small footprint of these converters makes them an ideal solution for space critical applications in communication equipment, instrumentation, and many other battery operated applications. MODEL SELECTION TABLE SINGLE OUTPUT MODELS Model Number DCMSW1-05S05 DCMSW1-05S12 DCMSW1-05S15 DCMSW1-12S05 DCMSW1-12S12 DCMSW1-12S15 DCMSW1-24S05 DCMSW1-24S12 DCMSW1-24S15 DCMSW1-48S05 DCMSW1-48S12 DCMSW1-48S15 Input Voltage 5 VDC (4.5 - 9 VDC) 12 VDC (9 - 18 VDC) 24 VDC (18 - 36 VDC) 48 VDC (36 - 75 VDC) Output Voltage 5 VDC 12 VDC 15 VDC 5 VDC 12 VDC 15 VDC 5 VDC 12 VDC 15 VDC 5 VDC 12 VDC 15 VDC Output Current Min Max 0mA 200mA 0mA 83mA 0mA 67mA 0mA 200mA 0mA 83mA 0mA 67mA 0mA 200mA 0mA 83mA 0mA 67mA 0mA 200mA 0mA 83mA 0mA 67mA Input Voltage 5 VDC (4.5 - 9 VDC) 12 VDC (9 - 18 VDC) 24 VDC (18 - 36 VDC) 48 VDC (36 - 75 VDC) Output Voltage ±12 VDC Output Current Min Max 0mA ±42mA ±15 VDC 0mA ±33mA ±12 VDC 0mA ±42mA Input Current Reflected No Load Max Load Ripple Current 256mA 252mA 40mA 80mA 248mA 105mA 105mA 20mA 40mA 102mA 53mA 51mA 10mA 30mA 51mA 26mA 26mA 7mA 20mA 26mA Output Power 1W 1W 1W 1W 1W 1W 1W 1W 1W 1W 1W 1W Efficiency 78% 79% 81% 79% 79% 82% 79% 82% 82% 79% 80% 80% Maximum Capacitive Load 1680µF 820µF 680µF 1680µF 820µF 680µF 1680µF 820µF 680µF 1680µF 820µF 680µF DUAL OUTPUT MODELS Model Number DCMSW1-05D12 DCMSW1-05D15 DCMSW1-12D12 DCMSW1-12D15 DCMSW1-24D12 DCMSW1-24D15 DCMSW1-48D12 DCMSW1-48D15 ±15 VDC 0mA ±33mA ±12 VDC 0mA ±42mA ±15 VDC 0mA ±33mA ±12 VDC 0mA ±42mA ±15 VDC 0mA ±33mA Input Current Reflected No Load Max Load Ripple Current 255mA 40mA 80mA 248mA 104mA 20mA 103mA 40mA 51mA 10mA 50mA 30mA 26mA 7mA 25mA 20mA Output Power 1W 79% Maximum Capacitive Load ±470µF 1W 80% ±330µF 1W 81% ±470µF 1W 80% ±330µF 1W 82% ±470µF 1W 82% ±330µF 1W 81% ±470µF 1W 81% ±330µF Efficiency NOTES 1. All DC/DC converters should be externally fused at the front end for protection. 2. Other input and output voltages may be available, please contact factory. *Due to advances in technology, specifications are subject to change without notice. 12/17/2013 Wall Industries, Inc. • 37 Industrial Drive, Exeter, NH 03833 • Tel: 603-778-2300 • Toll Free: 888-597-9255 • Fax 603-7789797 website: www.wallindustries.com • e-mail: [email protected] Page 1 of 5 DCMSW1 SERIES 1 Watt DC/DC Power Converters Rev A SPECIFICATIONS: DCMSW1 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 4.5 9 18 36 -0.7 -0.7 -0.7 -0.7 5 12 24 48 Max Unit INPUT SPECIFICATIONS Input Voltage Range Input Surge Voltage (1sec, max.) Start-Up Threshold Voltage 5VDC nominal input models 12VDC nominal input models 24 VDC nominal input models 48 VDC nominal input models 5VDC nominal input models 12VDC nominal input models 24 VDC nominal input models 48 VDC nominal input models 5VDC nominal input models 12VDC nominal input models 24 VDC nominal input models 48 VDC nominal input models Input Current Input Filter 5VDC nominal input models 12VDC nominal input models 24 VDC nominal input models 48 VDC nominal input models Input Fuse OUTPUT SPECIFICATIONS Output Voltage Output Voltage Setting Accuracy Line Regulation Load Regulation 10% load to 90% load Minimum Load Output Power Output Current Maximum Capacitive Load Ripple & Noise Transient Recovery Time Temperature Coefficient PROTECTION Short Circuit Protection REMOTE ON/OFF CONTROL Converter ON Converter OFF Standby Input Current GENERAL SPECIFICATIONS Efficiency Switching Frequency Isolation Voltage (I/P to O/P) Isolation Resistance (I/P to O/P) Isolation Capacitance (I/P to O/P) ENVIRONMENTAL SPECIFICATIONS Operating Ambient Temperature Case Temperature Storage Temperature Relative Humidity Cooling Lead Temperature MTBF PHYSICAL SPECIFICATIONS Weight 12/17/2013 Single Output Models Dual Output Models Single Output Models Dual Output Models 0 1 See Table See Table 30 250 ±0.02 Measurement bandwidth is 0-20MHz 25% load step change VDC VDC VDC %Vnom % % % mA W mVp-p µs %/°C continuous Open or high impedance 2~4mA current applied via 1KΩ resistor 2.5 mA Supply Off & Nominal Vin Nominal input voltage and full load See Table 220 60 seconds 500VDC 100KHz, 1V 1500 1000 50 See derating curve Flammability to UL 94V-0 rated KHz VDC MΩ pF -40 Non-condensing Natural convection is about 20LFM but is not equal to still air (0LFM) 1.5mm from case for 10 sec. MIL-HDBK-217F at 25°C, ground benign Dimensions (L x W x H) Case Material Pin Material SAFETY Safety Approvals See Table ±1.0 ±0.2 ±1.0 ±1.0 ±0.5 ±0.8 Nominal input and half load Low line to high line Min load to full load 9 18 36 75 15 25 50 100 4.5 9 18 36 See Table capacitor 500mA slow-blow type 250mA slow-blow type 120mA slow-blow type 60mA slow-blow type +85 °C +95 °C -50 +125 °C 95 % RH Free air convection (20LFM) 260 °C 2,800,000 hours 0.16oz (4.5g) 0.74 x 0.54 x 0.33 inch (18.9 x 13.7 x 8.45 mm) Non-conductive black plastic Phosphor bronze CSA 60950-1 recognition, IEC/EN 60950-1 (CB-scheme) pending Wall Industries, Inc. • 37 Industrial Drive, Exeter, NH 03833 • Tel: 603-778-2300 • Toll Free: 888-597-9255 • Fax 603-7789797 website: www.wallindustries.com • e-mail: [email protected] Page 2 of 5 Rev A DCMSW1 SERIES 1 Watt DC/DC Power Converters DERATING CURVE MECHANICAL DRAWING Mechanical Dimensions 12/17/2013 Connecting Pin Patterns Wall Industries, Inc. • 37 Industrial Drive, Exeter, NH 03833 • Tel: 603-778-2300 • Toll Free: 888-597-9255 • Fax 603-7789797 website: www.wallindustries.com • e-mail: [email protected] Page 3 of 5 Rev A DCMSW1 SERIES 1 Watt DC/DC Power Converters 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 0.47µF ceramic capacitor. Scope measurement should be made by using a BNC socket, measurement bandwidth is 020MHz. Position the load between 50mm and 75mm from the DC/DC converter. DESIGN & FEATURE CONSIDERATIONS Remote On/Off Negative logic remote on/off turns the module OFF during a logic high voltage on the remote on/off pin and ON 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 terminal. The switch can be an open collector or equivalent. A logic high is 2~4mA current applied via 1KΩ resistor. A logic low is open circuit or high impedance. Maximum Capacitive Load The DCMSW1 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. 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. 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 into its specified range. 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. 12/17/2013 Wall Industries, Inc. • 37 Industrial Drive, Exeter, NH 03833 • Tel: 603-778-2300 • Toll Free: 888-597-9255 • Fax 603-7789797 website: www.wallindustries.com • e-mail: [email protected] Page 4 of 5 Rev A DCMSW1 SERIES 1 Watt DC/DC Power Converters 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. 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 100 KHz) capacitor of 8.2µF for 5VDC input models, 3.3µF for 12VDC input models, and 1.5µF for 24VDC and 48VDC input models. DESIGN & FEATURE CONSIDERATIONS 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 95°C. The derating curves are determined from measurements obtained in a test setup. 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 discuss your future projects. Contact Wall Industries for further information: Phone: Toll Free: Fax: E-mail: Web: Address: 12/17/2013 (603)778-2300 (888)597-9255 (603)778-9797 [email protected] www.wallindustries.com 37 Industrial Drive Exeter, NH 03833 Wall Industries, Inc. • 37 Industrial Drive, Exeter, NH 03833 • Tel: 603-778-2300 • Toll Free: 888-597-9255 • Fax 603-7789797 website: www.wallindustries.com • e-mail: [email protected] Page 5 of 5