Document
Powering Communications and Technology
OBS SERIES 25 WATT
FEATURES • Industry standard package • • 24 and 48V input versions • • 25W output power • 100°C baseplate operation • • TECHNICAL SPECIFICATIONS
Input
Voltage Range 24 VDC Nominal 48 VDC Nominal Reflected Ripple Input Reverse Voltage Protection
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, sixsided 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. Trim And Enable Pins Fixed Frequency 1500V Isolation 6-Sided Shielding
EFFICIENCY %
Efficiency vs. Load (24V Input)
95 90 85 80 EFF. OBS025YG 75 70 65 10 20 30 40 50 60 70 80 90 100
LO AD %
EFF. OBS025YH
18 - 36 VDC 34 - 75 VDC 25 mA Shunt Diode
EFF. OBS025YJ
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 ±1% 0.2% Vout 0.5% Vout 10 % Iout Rated 25% Iout 4% Vout 500 µs ±10% Iout Rated Hiccup 110 - 140% 115 - 140%Vout Nom. Hiccup
Efficiency vs. Load (48V Input)
95 90 85
EFFICIENCY %
80 75 70 65 60 EFF. OBS017ZE
EFF. OBS025ZG
High Density - Board Mounted Power Division
OVP
EFF. OBS025ZH
General
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.) 10 ms Positive Vin Negative 400 kHz 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
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.
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Powering Communications and Technology
MODELS - (See the last page of Section for options.)
Selection Chart
Model OBS025YH OBS025YJ OBS017ZE OBS025ZG OBS025ZH OBS025ZJ Vin (Volts) 24 24 48 48 48 48 Vin Range (Volts) 18 - 36 18 - 36 34 - 75 34 - 75 34 - 75 34 - 75 Iin Max.* (Amps) 1.90 1.90 0.60 0.94 0.92 0.92 Vout (Volts) 12 15 3.3 5 12 15
OBS SERIES 25 WATT
Iout Rated (Amps) 2.1 1.7 5.0 5.0 2.1 1.7
Ripple & Noi.