NFN25 SERIES
Dual and triple output
85VAC to 264VAC universal input range
120VDC to 370VDC input voltage range
Fixed frequency operation
Overvoltage protection (+5V output)
Meets EN55022 limit B and FCC part 15 limit B line
conducted noise
• VDE, UL and CSA approved
The NFN25 Series of universal input, 25 Watt switching power supplies are
mechanically equivalent to the industry standard NFS40, but are optimised for
operation at lower output power levels. The NFN25 Series uses an advanced,
fixed frequency design which further reduces the line-conducted noise below
EN55022 and FCC limit B and specifies a much lower leakage current. The
supplies deliver 25W continuous, 35W peak and regulate to zero load. NFN25
Series power supplies are particularly suitable for telecoms applications such as
modems, PABX’s and networking systems.
[ 2 YEAR WARRANTY ]
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SPECIFICATION
OUTPUT SPECIFICATIONS
Output power
Line regulation
LL to HL, FL
Total regulation
(See Note 4)
Overshoot/undershoot
Transient response
All specifications are typical at nominal input, full load at 25°C unless otherwise stated
ELECTROMAGNETIC COMPATIBILITY SPECIFICATIONS CON’T
25W
35W
±0.2%, max.
±1%, max.
±0.2%, max.
±2.0%, max.
see table
see table
0%
±120mV max. dev.
500µs recovery
±0.02%/°C, max.
6.25V ±0.75V
Switching frequency
Fixed, 45kHz ±5kHz
IEC950, IEC1010, EN60950
UL1950, VDE0805, BABT
CSA C22.2 No. 950
280g (9.6oz)
MIL-HDBK-217E, 25°C 170,000 hours
60W Pin limit, max.
35W Pin limit, min.
Continuous
Weight
85 to 264VAC
120 to 370VDC
47 to 440Hz
Thermal performance
MTBF
Approvals and
standards
Conducted emissions
Radiated emissions
ESD air
ESD contact
Surge
Fast transients
Radiated immunity
Conducted immunity
EN55022, level B
EN55022, level B
EN61000-4-2, level
EN61000-4-2, level
EN61000-4-5, level
EN61000-4-4, level
EN61000-4-3, level
EN61000-4-6, level
Continuous
Peak (60s)
Main output (Output 1)
Output 2
Output 3
Main output (Output 1)
Auxilliary output
Auxilliary output
At turn-on
+5V
(1.5 to 3A step)
3
4
3
3
3
3
Perf.
Perf.
Perf.
Perf.
Perf.
Perf.
criteria
criteria
criteria
criteria
criteria
criteria
1
1
1
1
2
1
GENERAL SPECIFICATIONS
Hold-up time
Efficiency
Isolation voltage
110VAC input
230VAC input
25W output
Input/output
Input/chassis
16ms
80ms
70% typical
3000VAC
1500VAC
Temperature coefficient All outputs
Overvoltage protection
Output power limit
Short circuit protection
INPUT SPECIFICATIONS
Input voltage range
Input frequency range
Input surge current
Safety ground
leakage current
110VAC, cold start
230VAC, cold start
132VAC, 60Hz
264VAC, 50Hz
+5V output
Primary power
limited
ENVIRONMENTAL SPECIFICATIONS
15A max.
32A max.
155µA, max.
261µA, max.
0°C to 50°C ambient,
25W max.
convection cooled
50°C to +70°C ambient
Derate to
convection cooled
50% load
Peak (0°C to +50°C,
35W
max. 60 seconds)
Non-operating
–40°C to +85°C
Non-condensing
Operating
Non-operating
5% to 95% RH
10,000 feet max.
30,000 feet max.
Data Sheet © Artesyn Technologies® 2000
The information and specifications contained in this data sheet are believed to be correct at
time of publication. However, Artesyn Technologies accepts no responsibility for consequences
arising from printing errors or inaccuracies. Specifications are subject to change without notice.
No rights under any patent accompany the sale of any such product(s) or information contained
herein.
Relative humidity
Altitude
Vibration
Random vibration
2.4G rms approx.
Three orthogonal axes 5Hz to 500Hz
10 min. test per axis
PAGE 1
AC/DC POWER SUPPLIES
|
25W AC
25 Watt
AC/DC universal input switch mode power supplies
OUTPUT
VOLTAGE
+5.1V (A)
+12.0V (B)
–12.0V
+5.1V
+12.0V
–12.0V
+5.1V (A)
+12.0V (B)
OUTPUT CURRENTS
MIN
0A
0A
0A
0A
0A
0A
0A
0A
MAX
(1)
PEAK
5.0A
3.0A
1.0A
5.0A
1.0A
1.0A
5.0A
3.0A
(2)
RIPPLE
(3)
TOTAL
REGULATION
±2.0%
±5.0%
±5.0%
±2.0%
±2.0%
±2.0%
±2.0%
±5.0%
(4)
MODEL NUMBER
NFN25-7608
2.0A
1.5A
0.2A
3.0A
0.2A
0.2A
2.0A
1.5A
50mV
120mV
120mV
50mV
120mV
120mV
50mV
120mV
NFN25-7628
(5)
NFN25-7629
Notes
1
2
Natural convection cooling.
Peak output current lasting less than 60 seconds with duty cycle less than
5%. During peak loading, outputs may go outside of total regulation
limits. Total peak power output is 35 Watts.
Figure is peak-to-peak. Output noise measurements are made across a
50MHz bandwidth using a 12” twisted pair, terminated with a 47µF cap.
Total regulation is defined as the static output regulation at 25°C,
including initial tolerance, line voltage within stated limits, load currents
within stated limits and output voltages adjusted to their factory settings.
Also, 0.5≤I(A)/I(B)≤3 to maintain stated regulation. This does not apply to
the NFN25-7628.
The NFN25-7628 has separately regulated +12V and -12V outputs. The
loading condition in note 4 does not apply.
Derate linearly from 25 Watts at 50
o
C to 12.5 Watts at 70
o
C.
Derating curve is application specific for ambient temperatures > 50°C,
for optimum reliability no part of the heatsink should exceed 120
o
C and
no semiconductor case temperature should exceed 125
o
C.
Caution: Allow a minimum of 1 second after disconnecting the power
before making thermal measurements.
This product is only for inclusion by professional installers within other
equipment and must not be operated as a stand alone product.
AC mating connector
Molex 09-50-3031 or equiv. with Molex 08-50-0105 crimp terminals or equiv.
DC mating connector
Molex 09-91-0600 or equiv. with Molex 08-50-0164 crimp terminals or equiv.
5.00
(127.00)
3
4
0.156 (3.96) Dia.
(4 Places)
5
6
7
NON-METALLIC
STAND-OFF
(SEE NOTE A)
C5
MAXIMUM
COMPONENT
HEIGHT 1.2 inches
Q1
1
T1
J2
2.550
(64.8)
J1
3.00
(76.2)
8
9
~
N
~
L
F1
F 3.15A, H 250VAC
P1 (SEE NOTE C)
0.22
(5.59)
4.55
(115.8)
ALL DIMENSIONS IN INCHES (mm)
0.22 (5.59)
PIN CONNECTIONS
J1
Pin 1
Pin 2
J2
Pin 1
Pin 2
Pin 3
Pin 4
Pin 5
Pin 6
P1
Pin 1
Safety Earth Ground
+12V
+5.1V
+5.1V
Return
Return
–12V
+12V
+5.1V
+5.1V
Return
Return
–12V
+12V
+5.1V
+5.1V
Return
Return
N/C
-7608
AC Live
AC Neutral
-7628
AC Live
AC Neutral
-7629
AC Live
AC Neutral
Mechanical notes
A The ground pad of the mounting hole near P1 allows system grounding
through a metal stand-off.
B To improve conducted noise, the ground pad of the mounting hole near
the output connector should be connected with the ground pad of the
mounting hole near J3. Use metal stand-offs attached to a common metal
chassis. This connection also significantly attenuates common mode
noise.
C A standard L-bracket and cover is available for mounting which contains
all screws, connectors and necessary mounting hardware. Details are on
page CHECK. Order part number ‘NFS40 COVER KIT’.
DERATING CURVE
(See Note 6, 7, 8 and 9)
Output Power (Watts)
35W
PEAK POWER, 60 SECONDS
International Safety Standard Approvals
25W
VDE0805/EN60950/IEC950/IEC1010
File No. 10401-3336-10674 Licence No. 2559, 1651
UL1950 File No. E136005
CSA 22.2 No. 950 File No. LR41062C/LR50913/LR101320
4W
0W
NATURAL
CONVECTION
COOLING
12.5W
DS_NFN25_19980401.PDF
4W MIN. LOAD REQUIRED TO ACHIEVE DESIGN MTBF
0
°
C 10
°
C
20
°
C
30
°
C
40
°
C
50
°
C
60
°
C
70
°
C
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