OBS DC-DC Series Data Sheet Features * RoHS lead-solder exemption compliant * Industry-standard package * 24 and 48 V input versions * 25 W output power * 100 C baseplate operation * Trim and enable pins * Fixed frequency * 1500 V isolation * 6-sided shielding Description OBS single output dc-dc converters provide up to 25 watts of output power in an industry-standard package and footprint. The OBS units feature excellent efficiency, six-sided shielding, and fixed switching frequency. With 100 C case operation, the OBS converters are especially suited to telecom, networking, and industrial applications. These units are 100% surface-mount construction and fully-compatible with production board washing processes. Efficiency vs. Load (24V Input) Technical Specifications 95 Input Voltage Range 24 VDC Nominal 48 VDC Nominal Reflected Ripple Input Reverse Voltage Protection 90 18 - 36 VDC 34 - 75 VDC 25 mA Shunt Diode 85 80 EFF. OBS025YG 75 EFF. OBS025YH EFF. OBS025YJ 70 Output Setpoint Accuracy Line Regulation Vin Min - Vin Max., Iout Rated Load Regulation Iout Min. - Iout Max., Vin Nom. Minimum Output Current Dynamic Regulation, Loadstep Pk Deviation Settling Time Voltage Trim Range Short Circuit / Overcurrent Protection Current Limit Threshold Range, % of Iout Rated OVP Trip Range OVP 65 1% 0.2% Vout 0.5% Vout 10 % Iout Rated 25% Iout 4% Vout 500 s 10% Iout Rated Hiccup 110 - 140% 115 - 140%Vout Nom. Hiccup 10 20 30 40 50 60 MCD10043 Rev. 1.0 1500 VDC 500 VDC 500 VDC 0.03%/C -40 to +100 C -40 to +125 C 95% 5 g, 10 - 55 Hz 1.8 x 106 hrs UL, cUL, TUV 1.9 oz Page 1 of 2 100 90 85 80 EFF. OBS017ZE EFF. OBS025ZG 65 10 ms Positive Vin Negative 400 kHz 90 95 70 Turn-On Time: 24 & 48Vin Remote Shutdown Remote Shutdown Reference Switching Frequency Isolation Input - Output Input - Case (24 Vin units) Output - Case (48 V in units) Temperature Coefficient Case Temperature Operating Range Storage Range Humidity Max., Non-Condensing Vibration, 3 Axes, 5 Min Each MTBF (Bellcore TR-NWT-000332) Safety Weight (Approx.) 80 Efficiency vs. Load (48V Input) 75 General 70 LO AD % EFF. OBS025ZH 60 55 10 20 30 40 50 60 70 80 90 100 LOAD % Notes MTBF predictions may vary slightly from model to model. Specifications typically at 25 C , normal line, and full load, unless otherwise stated. Soldering Conditions: I/O pins, 260 C, ten seconds; fully compatible with commercial wave-soldering equipment. Units are water-washable and fully compatible with commercial spray or immersion post wave-solder washing equipment. www.power-one.com OBS DC-DC Series Data Sheet Model Selection MODEL INPUT VOLTAGE (VOLTS) INPUT VOLTAGE RANGE (VOLTS) MAXIMUM INPUT CURRENT (AMPS)* OUTPUT VOLTAGE (VOLTS) RATED OUTPUT CURRENT (AMPS) 24 24 48 48 48 48 18-36 18-36 34-75 34-75 34-75 34-75 1.90 1.90 0.60 0.94 0.92 0.92 12 15 3.3 5 12 15 2.1 1.7 5.0 5.0 2.1 1.7 OBS025YH OBS025YJ OBS017ZE OBS025ZG OBS025ZH OBS025ZJ NOTES: RIPPLE & NOISE pk-pk (mV) TYPICAL EFFICIENCY** 120 150 75 75 120 150 88% 87% 81% 83% 88% 88% * Maximum input current at minimum input voltage, maximum rated output power. ** At nominal Vin, rated output. Model numbers highlighted in yellow or shaded are not recommended for new designs. Mechanical Drawing Thermal Impedance Natural Convection 100 LFM 200 LFM 300 LFM 400 LFM 10.3 C/W 7.7 C/W 6.3 C/W 5.1 C/W 4.0 C/W Note: Thermal impedance data is dependent on many environmental factors. The exact thermal performance should be validated for specific application. Pin Function Tolerances 1 +Vin 2 -Vin Inches: .XX 0.020 .XXX 0.010 (Millimeters) .X 0.5 .XX 0.25 3 4 5 No Conn. Enable No Pin Pin: 0.002 0.05 6 +Vout 7 -Vout Case: + 0.04, - 0.00 + 1.0, - 0.00 8 Trim (Dimensions as listed unless otherwise specified.) NUCLEAR AND MEDICAL APPLICATIONS - Power-One products are not designed, intended for use in, or authorized for use as critical components in life support systems, equipment used in hazardous environments, or nuclear control systems without the express written consent of the respective divisional president of Power-One, Inc. TECHNICAL REVISIONS - The appearance of products, including safety agency certifications pictured on labels, may change depending on the date manufactured. Specifications are subject to change without notice. MCD10043 Rev. 1.0 Page 2 of 2 www.power-one.com