鈥?/div>
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, six-
sided shielding, and fixed switching frequency. With 100擄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
鹵1%
0.2% Vout
0.5% Vout
10 % Iout Rated
25% Iout
4% Vout
500
碌s
鹵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鈥?(Bellcore TR-NWT-000332)
Safety
Weight (Approx.)
10 ms
Positive
Vin Negative
400 kHz
1500 VDC
500 VDC
500 VDC
0.03%/擄C
-40 to +100擄C
-40 to +125擄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
鈥?MTBF predictions may vary slightly from model to model.
Specifications typically at 25擄C, normal line, and full load,
unless otherwise stated.
Soldering Conditions: I/O pins, 260擄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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