User Manual

Notes
1 Natural convection cooling.
2 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.
3 Figure is peak-to-peak. Output noise measurements are made across a
50MHz bandwidth using a 12 inch twisted pair, terminated with a 47µF
capacitor.
4 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 NFS25-7628.
5 The NFS25-7628 has separately regulated +12V and -12V outputs. The
loading condition in note 4 does not apply.
6 Derate linearly from 25 Watts at 50
o
C to 12.5 Watts at 70
o
C.
7 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.
8 Caution: Allow a minimum of 1 second after disconnecting the power
before making thermal measurements.
9 A 4 Watt minimum load is required to achieve design MTBF.
10 This product is only for inclusion by professional installers within other
equipment and must not be operated as a stand alone product.
0.156 (3.96) Dia.
(4 Places)
5.00
(127.00)
NON-METALLIC
STAND-OFF
(SEE NOTE A)
MAXIMUM
COMPONENT
HEIGHT 1.2
inches
C5
J2
1
P1 (SEE NOTE C)
F1
J1
N
~
L
Q1
F 3.15A, H 250VAC
2.550
(64.8)
0.22
(5.59)
3.00
(76.2)
0.22 (5.59)
4.55
(115.8)
~
ALL DIMENSIONS IN INCHES (mm)
T1
12.5W
25W
0°C 10°C 20°C 30°C 40°C 50°C 60°C 70°C
DERATING CURVE
(See Notes 6, 7, 8, 9)
Output Power (Watts)
NATURAL
CONVECTION
COOLING
0W
35W
4W MIN. LOAD REQUIRED TO ACHIEVE DESIGN MTBF
4W
PEAK POWER, 60 SECONDS
Mechanical notes
A In order to meet safety requirements, a non-metallic stand-off is
mandatory for one hole as specified in the mechanical drawing above.
B The ground pad of the mounting hole near P1 allows system grounding
through a metal stand-off.
C 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 P1. Use metal stand-offs attached to a common
metal chassis. This connection also significantly attenuates common
mode noise.
D A standard L-bracket and cover is available for mounting which contains
all screws, connectors and necessary mounting hardware. Details are on
page 72. Order part number ‘NFS40 COVER KIT’.
AC mating connector
Molex 09-50-3031 or equivalent with Molex 08-50-0105 crimp terminals or
equivalent
DC mating connector
Molex 09-91-0600 or equivalent with Molex 08-50-0164 crimp terminals or
equivalent
25 Watt
AC/DC universal input switch mode power supplies
LOW TO MEDIUM POWER AC/DC POWER SUPPLIES | 25W AC/DC
PAGE 19
http://www.artesyn.com
OUTPUT
OUTPUT CURRENTS
RIPPLE
(3)
TOTAL
MODEL NUMBER
(D)
VOLTAGE
MIN
(9)
MAX
(1)
PEAK
(2)
REGULATION
(4)
+5.1V (I
A
) 0A 2.0A 5.0A 50mV ±2.0% NFS25-7608
(4)
+12.0V (I
B
) 0A 1.5A 3.0A 120mV ±5.0%
–12.0V 0A 0.2A 1.0A 120mV ±5.0%
+5.1V 0A 3.0A 5.0A 50mV ±2.0% NFS25-7628
(5)
+12.0V 0A 0.2A 1.0A 120mV ±2.0%
–12.0V 0A 0.2A 1.0A 120mV ±2.0%
+5.1V (I
A
) 0A 2.0A 5.0A 50mV ±2.0% NFS25-7629
(4)
+12.0V (I
B
) 0A 1.5A 3.0A 120mV ±5.0%
PIN CONNECTIONS
J1 -7608 -7628 -7629
Pin 1 AC Line AC Line AC Line
Pin 2 AC Neutral AC Neutral AC Neutral
J2
Pin 1 +12V +12V +12V
Pin 2 +5.1V +5.1V +5.1V
Pin 3 +5.1V +5.1V +5.1V
Pin 4 Return Return Return
Pin 5 Return Return Return
Pin 6 –12V –12V N/C
P1
Pin 1 Safety Ground
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.
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DS_NFS25_20000101.PDF