Data Sheet
September 6, 2008
FNW700R Series Power Modules; DC-DC Converters
36-75Vdc Input; 28Vdc, 700W Output
Features
High power density: 127 W/in
3
Industry standard pin-out
Low output ripple and noise
Industry standard Full brick footprint
116.6mm x 60.7mm x 12.7mm
(4.6” x 2.4” x 0.5”)
Remote Sense
2:1 input voltage range
Applications
RF Power Amplifier
Wireless Networks
Switching Networks
Single tightly regulated main output
Constant switching frequency
Latch after fault shutdown
Over temperature protection auto restart
Loosely regulated auxiliary output
Power good signal
Output voltage adjustment trim (+10%/-40%)
Options
Output OCP/OVP auto restart
Shorter pins
Unthreaded heatsink holes
Wide operating case temperature range (-40°C to
100°C)
CE mark meets 73/23/EEC and 93/68/EEC
directives
§
UL60950-1/CSA
†
C22.2 No. 60950-1-03 Certified
‡
(
C
CSA
US
) and VDE 0805:2001-12 (EN60950-1)
Licensed
ISO** 9001 and ISO 14001 certified manufacturing
facilities
Description
The FNW700R series of dc-dc converters are a new generation of isolated DC/DC power modules providing up to
700W output power in an industry standard full size brick footprint, which makes it an ideal choice for high voltage
and high power applications. Threaded-through holes are provided to allow easy mounting or addition of a heatsink
for high-temperature applications. The output is fully isolated from the input, allowing versatile polarity configurations
and grounding connections
§
†
This product is intended for integration into end use equipment only
CSA
is a registered trademark of Canadian Standards Association.
‡
VDE
is a trademark of Verband Deutscher Elektrotechniker e.V.
** ISO is a registered trademark of the International Organization of Standards
Document No: DS07-003 ver 1.45
PDF name: fnw700r.ds.pdf
:
Data Sheet
September 6, 2008
FNW700R Power Modules; DC-DC Converters
36 – 75 Vdc Input; 28Vdc Output; 700W Output
Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are
absolute stress ratings only, functional operation of the device is not implied at these or any other conditions in
excess of those given in the operations sections of the data sheet. Exposure to absolute maximum ratings for
extended periods can adversely affect the device reliability.
Parameter
Input Voltage (Continuous)
Operating Ambient Temperature
(See Thermal Considerations section)
Note: When the operating ambient temperature is within 55C~85C,
the application of the module refers to the derating curves of Figure
15 and Figure 16.
Device
All
All
Symbol
V
IN
T
A
Min
-0.3
-40
Max
80
85
Unit
V
dc
°C
Operating Case Temperature
(See Thermal Considerations section)
Storage Temperature
I/O Isolation Voltage, input to case
Output to case
All
All
All
All
T
C
T
stg
⎯
⎯
-40
-55
⎯
⎯
100
125
1500
500
°C
°C
V
dc
V
dc
Electrical Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature
conditions.
Parameter
Operating Input Voltage
Maximum Input Current
(V
IN
=36V to 75V, I
O
=I
O, max
)
Inrush Transient
Input Reflected Ripple Current, peak-to-peak
(5Hz to 20MHz, 12μH source impedance; V
IN
=0V to
75V, I
O
= I
Omax
; see Figure 10)
Input Ripple Rejection (120Hz)
Device
All
All
All
All
All
60
Symbol
V
IN
I
IN,max
It
2
Min
36
Typ
48
Max
75
23
2
40
Unit
V
dc
A
dc
As
mA
p-p
dB
2
CAUTION: This power module is not internally fused. An input line fuse must always be used.
This power module can be used in a wide variety of applications, ranging from simple standalone operation to being
an integrated part of complex power architecture. To preserve maximum flexibility, internal fusing is not included.
Always use an input line fuse, to achieve maximum safety and system protection. The safety agencies require a fast-
acting fuse with a maximum rating of 30A (see Safety Considerations section). Based on the information provided in
this data sheet on inrush energy and maximum dc input current, the same type of fuse with a lower rating can be
used. Refer to the fuse manufacturer’s data sheet for further information.
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Data Sheet
September 6, 2008
FNW700R Power Modules; DC-DC Converters
36 – 75 Vdc Input; 28Vdc Output; 700W Output
Electrical Specifications
(continued)
Parameter
Output Voltage Set-point
(V
IN
=V
IN,nom
, I
O
=I
O, max
, T
c
=25°C)
Output Voltage
(Over all operating input voltage, resistive load,
and temperature conditions until end of life)
Output Regulation
Line (V
IN
=V
IN, min
to V
IN, max
)
Load (I
O
=I
O, min
to I
O, max
)
Temperature (T
c
= -40ºC to +100ºC)
Output Ripple and Noise on nominal output
(V
IN
=V
IN, nom
and I
O
=I
O, min
to I
O, max
)
RMS (5Hz to 20MHz bandwidth)
Peak-to-Peak (5Hz to 20MHz bandwidth)
External Capacitance
Note: use a minimum 470uF output capacitor. If
0
the ambient temperature is less than -20 C, use
more than 3 of recommended minimum
capacitors.
Output Current
Output Current Limit Inception
Efficiency
0
V
IN
=V
IN, nom
, T
c
=25 C
I
O
=I
O, max ,
V
O
= V
O,set
Switching Frequency
Dynamic Load Response
(ΔI
O
/Δt=1A/10μs; V
in
=V
in
,
nom
; T
c
=25°C; Tested
with a 470
μF
aluminum and a 10 µF ceramic
capacitor across the load.)
Load Change from I
O
= 50% to 75% of I
O,max
:
Peak Deviation
Settling Time (Vo<10% peak deviation)
Load Change from I
O
= 75% to 50% of I
o,max
:
Peak Deviation
Settling Time (Vo<10% peak deviation)
V
pk
t
s
⎯
__
3
2
⎯
__
%V
O, set
ms
All
C
O, max
470
1000
5000
μF
All
All
⎯
⎯
80
300
mV
rms
mV
pk-pk
All
All
All
⎯
⎯
⎯
0.05
0.05
100
0.2
0.2
300
%V
o
%V
o
mV
Device
All
All
Symbol
V
O, set
V
O
Min
27.5
27.15
Typ
28
⎯
Max
28.5
28.85
Unit
V
dc
V
dc
All
All
All
I
O
I
O, lim
η
f
sw
2
26
⎯
⎯
29
90
300
25
32
⎯
⎯
A
dc
A
dc
%
kHz
All
V
pk
t
s
__
⎯
3
2
__
⎯
%V
O, set
ms
Isolation Specifications
Parameter
Isolation Capacitance
Isolation Resistance
Symbol
C
iso
R
iso
Min
⎯
10
Typ
1500
⎯
Max
⎯
⎯
Unit
pF
MΩ
General Specifications
Parameter
Calculated Reliability based upon Telcordia SR-
332 Issue 2: Method
I
Case 3 (I
O
=80%I
O, max
,
T
A
=40°C, airflow = 200 lfm, 90% confidence)
Weight
Device
All
MTBF
All
⎯
2,466,797
150
(5.3)
⎯
Hours
g
(oz.)
Symbol
FIT
Min
Typ
405.4
Max
Unit
10 /Hours
9
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3
Data Sheet
September 6, 2008
FNW700R Power Modules; DC-DC Converters
36 – 75 Vdc Input; 28Vdc Output; 700W Output
Feature Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature
conditions. See Feature Descriptions for additional information.
Parameter
Remote On/Off Signal Interface
(V
IN
=V
IN, min
to V
IN, max
; open collector or equivalent),
Refer to remote on/off description and Figure 11.
Remote On/Off Current – Logic ON
Remote On/Off Current – Logic OFF
Turn-On Delay and Rise Times
(V
IN
=V
In,nom
, I
O
=I
O, max
, 25C)
Case 1: On/Off input is set to Logic Low (Module
ON) and then input power is applied (T
delay
from
instant at which V
IN
= V
IN, min
until Vo=10% of V
O,set
)
Case 2: Input power is applied for at least 1 second
and then the On/Off input is set from OFF to ON
(T
delay
= from instant at which V
IN
=V
IN, min
until V
O
=
10% of V
O, set
).
T
rise
= time for V
O
to rise from 10% of V
O,set
to 90%
of V
O,set
.
Output Voltage Overshoot
(I
O
=80% of I
O, max
, T
A
=25°C)
Output Voltage Adjustment
(See Feature Descriptions):
Output Voltage Remote-sense Range
(only for No Trim or Trim down application )
Output Voltage Set-point Adjustment Range (trim)
Output Overvoltage Protection
Over Temperature Protection
(See Feature Descriptions)
Input Under Voltage Lockout
Turn-on Threshold
Turn-off Threshold
Hysteresis
Input Over voltage Lockout
Turn-on Threshold
Turn-off Threshold
Hysteresis
All
All
All
All
All
All
V
IN, OVLO
⎯
79
---
76
80
4
78
⎯
---
V
dc
V
dc
V
dc
30
V
IN, UVLO
35
31
4
36
V
dc
V
dc
V
dc
All
All
All
All
V
sense
V
trim
V
O, limit
T
ref
__
__
__
⎯
106
2
110
38
⎯
%V
o,nom
%V
o,nom
V
°C
Device
Symbol
Min
Typ
Max
Unit
All
All
I
on/off
I
on/off
1.0
⎯
⎯
⎯
5.0
50
mA
μA
All
T
delay
60
75
100
ms
All
All
T
delay
⎯
5
⎯
ms
T
rise
⎯
25
⎯
3
ms
% V
O, set
60
32
⎯
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Data Sheet
September 6, 2008
FNW700R Power Modules; DC-DC Converters
36 – 75 Vdc Input; 28Vdc Output; 700W Output
Characteristic Curves
The following figures provide typical characteristics for the FNW700R (28V, 25A) at 25ºC. The figures are identical for
either positive or negative Remote On/Off logic.
On/Off VOLTAGE OUTPUT VOLTAGE
93
91
EFFICIENCY (%)
89
87
85
83
81
0
5
10
15
20
25
OUTPUT CURRENT, I
o
(A)
Vin=36V
Vin=48V
Vin=75V
V
ON/OFF
(V) (2V/div)
V
O
(V) (10V/div)
TIME, t (20ms/div)
Figure 1. Converter Efficiency versus Output
Current.
Figure 4. Typical Start-Up Using Remote On/Off,
R1=30Kohm; C
o,ext
= 470µF.
INPUT VOLTAGE OUTPUT VOLTAGE
V
O
(V) (10V/div)
V
IN
(V) (20V/div)
OUTPUT VOLTAGE,
V
O
(V) (100mV/div)
TIME, t (1μs/div)
TIME, t (20ms/div)
Figure 2. Typical Output Ripple and Noise at Room
Temperature and 48Vin; I
o
= I
o,max
; C
o,ext
= 470µF.
OUTPUT CURRENT OUTPUT VOLTAGE
Figure 5. Typical Start-Up Using from V
IN
, positive logic
version shown; C
o,ext
= 470µF.
OUTPUT CURRENT OUTPUT VOLTAGE
I
O
(A) (10A/div) V
O
(V) (500mV/div)
TIME, t (1ms/div)
I
O
(A) (10A/div)
V
O
(V) (500mV/div)
TIME, t (1ms/div)
Figure 3. Transient Response to Dynamic Load
Change from 25% to 50% to 25% of Full Load at
Room Temperature and 48 Vdc Input; 0.1A/uS ;
C
o,ext
= 470µF.
Figure 6. Transient Response to Dynamic Load Change
from 50% to 75% to 50% of Full Load at Room
Temperature and 48 Vdc Input; 0.1A/uS ;
C
o,ext
= 470µF.
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