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UEI25 Series
Single Output Isolated 25-Watt DC/DC Converters
FUNCTIONAL SPECIFICATIONS (CONT.) – MODEL UEI25-050-D48
OUTPUT
Total Output Power
Conditions ? ?
See Derating
Minimum
0.0
Typical/Nominal
25.0
Maximum
25.25
Units
W
Voltage
Nominal Output Voltage
Setting Accuracy
Output Voltage Range
Overvoltage Protection
No trim
At 50% load
User-adjustable
Via magnetic feedback
4.95
-1
-10
6
5.00
6.5
5.05
+1
+10
7.5
Vdc
% of Vset.
% of Vnom.
Vdc
Current
Output Current Range
Minimum Load ?
0
5.0
No minimum load
5.0
A
% of Iout
Current Limit Inception
98% of Vnom., after warmup
5.3
6.8
7.3
A
Short Circuit
Short Circuit Current
Short Circuit Duration (remove short for
recovery)
Short circuit protection method
Hiccup technique, autorecovery
Output shorted to ground, no damage
Current limiting
Continuous
0.3
A
Regulation ?
Line Regulation
Load Regulation
Vin=min. to max., Vout=nom., 50% load
Iout=min. to max., Vin=48V
±0.1
±0.2
% of Vout
% of Vout
Ripple and Noise
Temperature Coef?cient
Maximum Capacitive Loading (10% ceramic,
90% Oscon)
5 Hz- 20 MHz BW
At all outputs
Cap. ESR=<0.02Ω, full resistive load
0
50
0.02
80
2000
mV pk-pk
% of Vnom./°C
μF
MECHANICAL (Through Hole Models)
Outline Dimensions (no baseplate)
(Please refer to outline drawing)
Conditions ?
C75 case
WxLxH
Minimum
Typical/Nominal
0.96x1.1x0.32
24.4x27.9x8.1
Maximum
Units
Inches
mm
Weight
Through Hole Pin Diameter
Through Hole Pin Material
0.32
9.07
0.04
1.016
Copper alloy
Ounces
Grams
Inches
mm
TH Pin Plating Metal and Thickness
Nickel subplate
Gold overplate
50
5
μ-inches
μ-inches
ENVIRONMENTAL
Operating Ambient Temperature Range
Operating Case Temperature Range
Storage Temperature
With derating, 200 LFM
No derating, 200 LFM, full power
No derating
Vin = Zero (no power)
-40
-40
-40
-55
85
82
105
125
°C
°C
°C
°C
Thermal Protection/Shutdown
Measured in center
110
115
120
°C
Electromagnetic Interference
External ?lter is required
Conducted, EN55022/CISPR22
Radiated, EN55022/CISPR22
B
B
Class
Class
Relative humidity, non-condensing
Altitude
To +85°C
must derate -1%/1000 feet
10
-500
-152
90
10,000
3048
%RH
feet
meters
RoHS rating
Notes
? Unless otherwise noted, all speci?cations are at nominal input voltage, nominal out-
put voltage and full load. General conditions are +25? Celsius ambient temperature,
near sea level altitude, natural convection air?ow. All models are tested and speci?ed
with external parallel 1 μF and 10 μF multi-layer ceramic output capacitors. The ex-
ternal input capacitor is 4.7 μF ceramic. All capacitors are low-ESR types wired close
to the converter. These capacitors are necessary for our test equipment and may not
be needed in the user's application.
RoHS-6
? Input (back) ripple current is tested and speci?ed over 5 Hz to 20 MHz bandwidth.
Input ?ltering is Cbus=220 μF, Cin=33 μF and Lbus=12 μH.
? All models are stable and regulate to speci?cation under no load.
? The Remote On/Off Control is referred to -Vin.
? Regulation speci?cations describe the output voltage changes as the line voltage or
load current is varied from its nominal or midpoint value to either extreme.
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MDC_UEI25W.B09 Page 6 of 24
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