• 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
MODEL
typ
(Vdc)
input
voltage
range
(Vdc)
output
voltage
(Vdc)
min
(A)
output
current
max
(A)
output
power
max
(W)
ripple
& noise
1
max
(mVp-p)
efficiency
typ
(%)
PRD25-D48-S3
PRD25-D48-S5
PRD25-D48-S12
48
48
48
36~75
36~75
36~75
3.3
5
12
0.75
0
0
7.5
5
2.1
25
25
25.2
80
80
120
89.5
91
87.5
Notes:
1. At full load, nominal input, 20 MHz bandwidth oscilloscope, input terminated with a 4.7 μF capacitor. Output terminated with 1 μF and 10 μF low ESR capacitors.
2. All specifications are measured at Ta=25°C, nominal input voltage, and rated output load unless otherwise specified. All models are tested and specified with a 4.7 μF
on the input, and with 1 μF and 10 μF low ESR capacitors on the output.
PART NUMBER KEY
PRD25
-
DXX - SXX
-
X
-
X
-
X
Base Number
Input Voltage
Output Voltage
Packaging Style:
D = DIP
M = SMT
Package Options:
“blank” = standard
(through hole
models only)
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
operating input voltage
current
at nominal Vin
3.3 Vdc output models
5 Vdc output models
12 Vdc output models
rising input voltage
3.3, 12 Vdc output models
5 Vdc output models
falling input voltage
3.3, 12 Vdc output models
5 Vdc output models
3.3 Vdc output models
positive logic
negative logic
remote on/off
1
ON (10~15 Vdc or open circuit)
OFF (-0.7~1.2 Vdc)
ON (-0.7~1.2 Vdc)
OFF (10~15 Vdc or open circuit)
ON (10~15 Vdc or open circuit)
OFF (-0.7~0.7 Vdc)
ON (-0.7~0.8 Vdc)
OFF (10~15 Vdc or open circuit)
34
34
32
32
35.2
35
34
33.5
conditions/description
min
36
typ
48
max
75
0.81
0.79
0.842
36
36
35.2
34.5
units
Vdc
A
A
A
Vdc
Vdc
Vdc
Vdc
start-up voltage
under voltage shutdown
5, 12 Vdc output models
positive logic
negative logic
filter
3.3, 5 Vdc output models: LC filter
12 Vdc output models: capacitance filter
recommended to add 1.5 A fast blow fuse
input reverse polarity protection no
input fuse
Notes:
1. On/Off current is 1 mA.
OUTPUT
parameter
maximum capacitive load
conditions/description
low ESR <0.02 Ω, full load
3.3, 5 Vdc output models
12 Vdc output models
50% load, input voltage from low to high
3.3, 5 Vdc output models
12 Vdc output models
at nominal Vin, 0~100% load
3.3, 5 Vdc output models
12 Vdc output models
at 50% load
see application notes
3.3, 5 Vdc output models
12 Vdc output models
50-75-50% load change to 2% Vout
3.3 Vdc output models
5 Vdc output models
50-75-50% load change to 1% Vout
12 Vdc output models
temperature coefficient
300
295
±1
50
±10
330
325
180
200
100
±0.02
360
355
250
min
typ
max
2,000
470
±0.1
±0.075
±0.2
±0.05
units
μF
μF
%
%
%
%
%
ms
%
kHz
kHz
µs
µs
µs
%/°C
line regulation
load regulation
voltage accuracy
start-up time
adjustability
switching frequency
dynamic load response
200
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product page.
CUI Inc
│
SERIES:
PRD25
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DESCRIPTION:
DC-DC CONVERTER
date
05/20/2016
│
page
3 of 13
PROTECTIONS
parameter
over voltage protection
conditions/description
via magnetic feedback
3.3 Vdc output models
5 Vdc output models
12 Vdc output models
current limiting
3.3 Vdc output models
5 Vdc output models
12 Vdc output models
current limiting, hiccup auto restart
3.3, 5 Vdc output models
12 Vdc output models
110
130
min
4.2
6
14
8.5
5.3
2.3
typ
5
6.5
19
10
6.8
3
0.3
115
135
120
150
max
5.7
7.5
22
11
7.3
3.4
units
Vdc
Vdc
Vdc
A
A
A
A
°C
°C
over current protection
short circuit protection
over temperature protection
SAFETY AND COMPLIANCE
parameter
isolation voltage
isolation resistance
isolation capacitance
safety approvals
LVD
conducted emissions
1
radiated emissions
1
MTBF
RoHS
Notes:
conditions/description
input to output, continuous, basic insulation
3.3 Vdc output models
5 Vdc output models
12 Vdc output models
UL 60950-1, 2nd Edition
2006/95/EC (CE mark)
EN55022/CISPR22, Class B
(external circuit required, see Figure 3)
EN55022/CISPR22, Class B
(external circuit required, see Figure 3)
as per Telcordia SR-332 Method 1, Case 3, ground
fixed conditions, Ta=40°C
2011/65/EU
min
2,250
10
typ
max
units
Vdc
MΩ
1,000
2,000
1,700
pF
pF
pF
2,000,000
hours
1. Layout and the environment play an influential role with the filter’s performance. Performance will depend on the user’s PCB layout, the chassis shielding environment,
choice of external components, and other circuits present.
ENVIRONMENTAL
parameter
operating temperature
storage temperature
operating humidity
altitude
non-condensing
derates 1% /1000 ft
conditions/description
see derating curves
min
-40
-55
10
-500
-152
typ
max
85
125
90
10,000
3048
units
°C
°C
%
ft
m
cui.com
For more information, please visit the
product page.
CUI Inc
│
SERIES:
PRD25
│
DESCRIPTION:
DC-DC CONVERTER
date
05/20/2016
│
page
4 of 13
SOLDERABILITY
parameter
conditions/description
for Sn/Ag/Cu based solders (for through hole
models):
preheat temperature
solder pot temperature
solder dwell time
reflow solder profile below is suitable for SAC305
type lead-free solders (for surface mount models)
260
240
220
180
160
140
120
100
80
60
40
20
0
1
2
3
4
5
6
7
min
typ
max
units
wave soldering
115
270
7
245
260
°C
°C
s
°C
reflow soldering
optimal peak 245 ˚C, max peak 260 ˚C
SAC305 liquidus at 219 °C
ramp at 1 °C/second across liquidus
TAL at 60 seconds (range 45-75 seconds)
Temperature (°C)
ad
st
ju
m
ra
ep
p
r
fo
p
ak
so
t
ra
es
if
re
ire
qu
r
2
d
/s
e
nd
co
cooling rate 2-3 °C/second
°C
de
un
m
ra
ke
Time (minutes)
MECHANICAL
parameter
dimensions
weight
conditions/description
min
typ
max
units
inches
inches
9.07
g
through hole: 1.10 x 0.96 x 0.33 [27.9 x 24.4 x 8.4 mm]
surface mount: 1.10 x 0.96 x 0.33 [27.9 x 24.4 x 8.4 mm]
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