Datasheet

UEI25 Series
Single Output Isolated 25-Watt DC/DC Converters
MDC_UEI25W.B09 Page 4 of 24
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OUTPUT
Conditions ➀ ➂
Minimum Typical/Nominal Maximum Units
Total Output Power See Derating 0.0 25.0 25.25 W
Voltage
Nominal Output Voltage No trim 3.267 3.30 3.333 Vdc
Setting Accuracy At 50% load -1 +1 % of Vset.
Output Voltage Range User-adjustable -10 +10 % of Vnom.
Overvoltage Protection Via magnetic feedback 4.2 5 5.7 Vdc
Current
Output Current Range 0.7575 7.575 7.575 A
Minimum Load
➂
10% minimum load % of Iout
Current Limit Inception 98% of Vnom., after warmup 8.5 10 11 A
Short Circuit
Short Circuit Current Hiccup technique, autorecovery 0.3 A
Short Circuit Duration (remove short for
recovery)
Output shorted to ground, no damage Continuous
Short circuit protection method Current limiting
Regulation
➄
Line Regulation Vin=min. to max., Vout=nom., 50% load ±0.1 % of Vout
Load Regulation Iout=min. to max., Vin=48V ±0.2 % of Vout
Ripple and Noise 5 Hz- 20 MHz BW 50 80 mV pk-pk
Temperature Coeffi cient At all outputs 0.02 % of Vnom./°C
Maximum Capacitive Loading (10% ceramic,
90% Oscon)
Cap. ESR=<0.02, full resistive load 0 2000 F
MECHANICAL (Through Hole Models)
Conditions ➀
Minimum Typical/Nominal Maximum Units
Outline Dimensions (no baseplate) C75 case 0.9x1.1x0.32 Inches
(Please refer to outline drawing) WxLxH 22.86x27.9x8.1 mm
Weight 0.32 Ounces
9.07 Grams
Through Hole Pin Diameter 0.04 Inches
1.016 mm
Through Hole Pin Material Copper alloy
TH Pin Plating Metal and Thickness Nickel subplate 50 µ-inches
Gold overplate 5 µ-inches
ENVIRONMENTAL
Operating Ambient Temperature Range
With derating, 200 LFM -40 85 °C
No derating, 200 LFM -40 70 °C
Storage Temperature Vin = Zero (no power) -55 125 °C
Thermal Protection/Shutdown Measured in center 110 115 120 °C
Electromagnetic Interference External fi lter is required
Conducted, EN55022/CISPR22 B Class
Radiated, EN55022/CISPR22 B Class
Relative humidity, non-condensing To +85°C 10 90 %RH
Altitude must derate -1%/1000 feet -500 10,000 feet
-152 3048 meters
RoHS rating RoHS-6
FUNCTIONAL SPECIFICATIONS (CONT.) – MODEL UEI25-033-D48
Notes
➀ Unless otherwise noted, all specifi 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 airfl ow. All models are tested and specifi 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.
➁ Input (back) ripple current is tested and specifi ed over 5 Hz to 20 MHz bandwidth.
Input fi ltering is Cbus=220 µF, Cin=33 µF and Lbus=12 µH.
➂ All models are stable and regulate to specifi cation under minimum (10%) load.
Operation under no load will not damage the converter but may increase regulation,
output ripple, and noise.
➃ The Remote On/Off Control is referred to -Vin.
➄ Regulation specifi cations describe the output voltage changes as the line voltage or
load current is varied from its nominal or midpoint value to either extreme.