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date 05/20/2016
page 1 of 13
SERIES: PRD25 DESCRIPTION: DC-DC CONVERTER
FEATURES
up to 25 W isolated output
industry standard 1 x 1 package
2:1 input range
low ripple & noise
over voltage, over current, short circuit, and over
temperature protections
remote on/off control
output trim
-40 to 85 C temperature range
efficiency up to 91%
UL/cUL safety approval
input output output output ripple efficiency
MODEL
1
voltage voltage current power & noise
typ range min max max max typ
(Vdc) (Vdc) (Vdc) (A) (A) (W) (mVp-p) (%)
PRD25-D48-S3 48 36~75 3.3 0.75 7.5 25 80 89.5
PRD25-D48-S5 48 36~75 5 0 5 25 80 91
PRD25-D48-S12 48 36~75 12 0 2.1 25.2 120 87.5
Notes: 1. At full load, nominal input, 20 MHz bandwidth oscilloscope, input terminated with a 4.7 F capacitor. Output terminated with 1 F and 10 F low ESR capacitors.
2. All specifications are measured at Ta=25C, nominal input voltage, and rated output load unless otherwise specified. All models are tested and specified with a 4.7 F
on the input, and with 1 F and 10 F low ESR capacitors on the output.
PART NUMBER KEY
PRD25 - DXX - SXX - X - X - X
Base Number
Package Options:
blank = standard
Input Voltage
Output Voltage Packaging Style:
(through hole
D = DIP
models only)
M = SMT
TR = Tape & Reel
(SMT models only)
Remote On/Off Control:
P = positive logic
N = negative logic
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CUI Inc SERIES: PRD25 DESCRIPTION: DC-DC CONVERTER date 05/20/2016 page 2 of 13
INPUT
parameter conditions/description min typ max units
operating input voltage 36 48 75 Vdc
at nominal Vin
3.3 Vdc output models 0.81 A
current
5 Vdc output models 0.79 A
12 Vdc output models 0.842 A
rising input voltage
start-up voltage 3.3, 12 Vdc output models 34 35.2 36 Vdc
5 Vdc output models 34 35 36 Vdc
falling input voltage
under voltage shutdown 3.3, 12 Vdc output models 32 34 35.2 Vdc
5 Vdc output models 32 33.5 34.5 Vdc
3.3 Vdc output models
ON (10~15 Vdc or open circuit)
positive logic
OFF (-0.7~1.2 Vdc)
ON (-0.7~1.2 Vdc)
negative logic
OFF (10~15 Vdc or open circuit)
1
remote on/off
5, 12 Vdc output models
ON (10~15 Vdc or open circuit)
positive logic
OFF (-0.7~0.7 Vdc)
ON (-0.7~0.8 Vdc)
negative logic
OFF (10~15 Vdc or open circuit)
3.3, 5 Vdc output models: LC filter
filter
12 Vdc output models: capacitance filter
input reverse polarity protection no
input fuse recommended to add 1.5 A fast blow fuse
Notes: 1. On/Off current is 1 mA.
OUTPUT
parameter conditions/description min typ max units
low ESR <0.02 , full load
maximum capacitive load 3.3, 5 Vdc output models 2,000 F
12 Vdc output models 470 F
50% load, input voltage from low to high
line regulation 3.3, 5 Vdc output models 0.1 %
12 Vdc output models 0.075 %
at nominal Vin, 0~100% load
load regulation 3.3, 5 Vdc output models 0.2 %
12 Vdc output models 0.05 %
voltage accuracy at 50% load 1 %
start-up time 50 ms
adjustability see application notes 10 %
3.3, 5 Vdc output models 300 330 360 kHz
switching frequency
12 Vdc output models 295 325 355 kHz
50-75-50% load change to 2% Vout
3.3 Vdc output models 180 250 s
5 Vdc output models 200 s
dynamic load response
50-75-50% load change to 1% Vout
12 Vdc output models 100 200 s
temperature coefficient 0.02 %/C
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