Data Sheet
September 1997
FW050H, FW100H, FW150H Power Modules:
dc-dc Converters; 36 to 72 Vdc Input, 24 Vdc Output; 50 W to 150 W
Features
s
s
s
s
s
s
s
s
s
s
s
s
s
Wide input range
High efficiency: 86% typical
Parallel operation with load sharing
Low profile: 12.7 mm (0.5 in.)
Complete input and output filtering
Constant frequency
Case ground pin
Input-to-output isolation
Remote sense
Remote on/off
Short-circuit protection
Output overvoltage clamp
UL
* Recognized,
CSA
†
Certified, VDE Licensed
The FW050H, FW100H, and FW150H Power Modules use
advanced, surface-mount technology and deliver high-quality,
compact, dc-dc conversion at an economical price.
*
UL
is a registered trademark of Underwriters Laboratories, Inc.
†
CSA
is a registered trademark of Canadian Standards Association.
Applications
s
s
Options
s
Distributed and redundant power architectures
Telecommunications and PBX
Output voltage set-point adjustment (trim)
Description
The FW050H, FW100H, and FW150H Power Modules are dc-dc converters that operate over an input voltage
range of 36 Vdc to 72 Vdc and provide a precisely regulated dc output. The outputs are fully isolated from the
inputs, allowing versatile polarity configurations and grounding connections. The modules have maximum
power ratings from 50 W to 150 W at a typical full-load efficiency of 86%.
Built-in filtering, for both the input and output of each device, eliminates the need for external filters. Two or more
modules may be paralleled with forced load sharing for redundant or enhanced power applications. The
package, which mounts on a printed-circuit board, accommodates a heat sink for high-temperature applications.
FW050H, FW100H, FW150H Power Modules:
dc-dc Converters; 36 to 72 Vdc Input, 24 Vdc Output; 50 W to 150 W
Data Sheet
September 1997
Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are abso-
lute 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 device reliability.
Parameter
Input Voltage (continuous)
I/O Isolation Voltage
Operating Case Temperature
(See Thermal Considerations section and
Figure 18.)
Storage Temperature
Symbol
V
I
—
T
C
Min
—
—
0
Max
72
500
90
Unit
Vdc
V
°C
T
stg
–40
125
°C
Electrical Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature
conditions.
Table 1. Input Specifications
Parameter
Operating Input Voltage
Maximum Input Current (V
I
= 0 V to 72 V):
FW050H
FW100H
FW150H
Inrush Transient
Input Reflected-ripple Current, Peak-to-peak
(5 Hz to 20 MHz, 12 µH source impedance)
(See Figure 9.)
Input Ripple Rejection (120 Hz)
Fusing Considerations
CAUTION: This power module is not internally fused. An input line fuse must always be used.
This encapsulated power module can be used in a wide variety of applications, ranging from simple stand-alone
operation to an integrated part of a sophisticated power architecture. To preserve maximum flexibility, internal fus-
ing is not included; however, to achieve maximum safety and system protection, always use an input line fuse. The
safety agencies require a normal-blow, dc fuse with a maximum rating of 20 A (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 for further information.
Symbol
V
I
I
I, max
I
I, max
I
I, max
i
2
t
—
Min
36
—
—
—
—
—
Typ
48
—
—
—
—
20
Max
72
2.0
4.0
6.0
1.0
—
Unit
Vdc
A
A
A
A
2
s
mAp-p
—
—
60
—
dB
2
Tyco Electronics Corp.
Data Sheet
September 1997
FW050H, FW100H, FW150H Power Modules:
dc-dc Converters; 36 to 72 Vdc Input, 24 Vdc Output; 50 W to 150 W
Electrical Specifications
(continued)
Table 2. Output Specifications
Parameter
Output Voltage
(Over all operating input voltage, resistive load,
and temperature conditions until end of life; see
Figure 10 and Feature Descriptions.)
Output Voltage Set Point
(V
I
= 48 V; I
O
= I
O, max
; T
C
= 25 °C):
Unit Operating in Parallel or PARALLEL Pin
Shorted to SENSE(–) (See Figure 10 and
Feature Descriptions.)
PARALLEL Pin Open
Output Regulation:
Line (V
I
= 36 V to 72 V)
Load (I
O
= I
O, min
to I
O, max
)
Temperature (T
C
= 0 °C to 90 °C)
Output Ripple and Noise Voltage
(See Figure 5 and Figure 11.):
RMS
Peak-to-peak (5 Hz to 20 MHz)
Output Current
(At I
O
< I
O, min
, the modules may exceed output
ripple specifications.):
FW050H
FW100H
FW150H
Output Current-limit Inception
(V
O
= 21.6 V; see Figure 2 and Feature Descriptions.)
Output Short-circuit Current
(V
O
= 250 mV; see Figure 2.)
External Load Capacitance
(electrolytic, total for one unit or multiple paralleled
units)
Efficiency
(V
I
= 48 V; I
O
= I
O, max
; T
C
= 25 °C; see Figure 3,
Figure 4, and Figure 10.)
Dynamic Response
(
∆
I
O
/
∆
t = 1 A/10 µs, V
I
= 48 V, T
C
= 25 °C; see
Figure 6 and Figure 7.):
Load Change from I
O
= 50% to 75% of I
O, max
:
Peak Deviation
Settling Time (V
O
< 10% of peak deviation)
Load Change from I
O
= 50% to 25% of I
O, max
:
Peak Deviation
Settling Time (V
O
< 10% of peak deviation)
Symbol
V
O
Min
22.80
Typ
—
Max
25.20
Unit
Vdc
V
O, set
23.50
24.00
24.50
Vdc
V
O, set
—
—
—
23.50
—
—
—
24.00
0.05
0.2
100
25.00
0.2
0.4
250
Vdc
%
%
mV
—
—
—
—
—
—
150
400
mVrms
mVp-p
I
O
I
O
I
O
I
O, cl
i
—
—
0.4
0.4
0.4
103
—
0
—
—
—
—
135
—
2.1
4.2
6.3
130
200
800
A
A
A
% I
O, max
% I
O, max
µF
η
82
86
—
%
—
—
—
—
—
—
—
—
250
300
250
300
—
—
—
—
mV
µs
mV
µs
Tyco Electronics Corp.
3
FW050H, FW100H, FW150H Power Modules:
dc-dc Converters; 36 to 72 Vdc Input, 24 Vdc Output; 50 W to 150 W
Data Sheet
September 1997
Electrical Specifications
(continued)
Table 3. Isolation Specifications
Parameter
Isolation Capacitance
Isolation Resistance
Min
—
10
Typ
1700
—
Max
—
—
Unit
pF
M
Ω
General Specifications
Parameter
Calculated MTBF (I
O
= 80% of I
O, max
; T
C
= 40 °C)
Weight
Min
—
Typ
2,125,000
—
Max
200 (7)
Unit
hours
g (oz.)
Feature Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature
conditions. See Feature Descriptions for further information.
Parameter
Remote On/Off Signal Interface
(V
I
= 0 V to 72 V; open collector or equivalent
compatible; signal referenced to V
I
(–) terminal; see
Figure 12 and Feature Descriptions.):
Logic Low—Module On
Logic High—Module Off
Logic Low:
At I
on/off
= 1.0 mA
At V
on/off
= 0.0 V
Logic High:
At I
on/off
= 0.0 µA
At V
on/off
= 15 V
Turn-on Time
(I
O
= 80% of I
O, max
; V
O
within ±1% of steady state)
Output Voltage Adjustment
(See Feature Descriptions.):
Output Voltage Remote-sense Range
Output Voltage Set-point Adjustment Range (trim)
Parallel Operation Load Sharing
(See Feature Descriptions.)
Output Overvoltage Clamp
Symbol
Min
Typ
Max
Unit
V
on/off
I
on/off
V
on/off
I
on/off
—
0
—
—
—
—
—
—
—
—
50
1.2
1.0
15
50
100
V
mA
V
µA
ms
—
—
—
V
O, clamp
—
90
—
26.4
—
—
—
29.0
2.4
110
20
32.0
V
%V
O, nom
% I
O, max
V
4
Tyco Electronics Corp.
Data Sheet
September 1997
FW050H, FW100H, FW150H Power Modules:
dc-dc Converters; 36 to 72 Vdc Input, 24 Vdc Output; 50 W to 150 W
Characteristic Curves
The following figures provide typical characteristics for the FW150H Power Module. The FW050H and FW100H
characteristics are similar to the FW150H characteristics provided here, scaled by power level where appropriate.
6
5
INPUT CURRENT, I
I
(A)
90
85
I
O
= 6.3 A
EFFICIENCY,
η
(%)
80
75
70
65
60
55
50
0.0
0.5
1.0
1.5
2.0
2.5
V
I =
36 V
V
I =
54 V
V
I =
72 V
4
3
2
I
O
= 3.2 A
1
0
0
10
20
30
40
50
60
70
INPUT VOLTAGE, V
I
(V)
8-961 (C)
OUTPUT CURRENT, I
O
(A)
8-962 (C)
Figure 1. Typical FW150H Input Characteristics at
Room Temperature
Figure 3. Typical FW050H Efficiency vs. Output
Current at Room Temperature
25
OUTPUT VOLTAGE, V
O
(V)
90
85
20
EFFICIENCY,
η
(%)
80
75
70
65
60
55
50
V
I
= 36 V
V
I
= 54 V
V
I
= 72 V
15
10
V
I =
36 V
V
I =
54 V
V
I =
72 V
5
0
0
1
2
3
4
5
6
7
8
9
OUTPUT CURRENT, I
O
(A)
8-976 (C)
0
1
2
3
4
5
6
7
OUTPUT CURRENT, I
O
(A)
8-977 (C)
Figure 2. Typical FW150H Output Characteristics
at Room Temperature and 48 V Input
Figure 4. Typical FW150H Efficiency vs. Output
Current at Room Temperature
Tyco Electronics Corp.
5
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