
2
Tyco Electronics Corp.
Data Sheet
September 1997
dc-dc Converters; 36 to 72 Vdc Input, 24 Vdc Output; 50 W to 150 W
FW050H, FW100H, FW150H Power Modules:
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.
Electrical Specications
Unless otherwise indicated, specications apply over all operating input voltage, resistive load, and temperature
conditions.
Table 1. Input Specications
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 exibility, 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.
Parameter
Symbol
Min
Max
Unit
Input Voltage (continuous)
VI
—
72
Vdc
I/O Isolation Voltage
—
500
V
Operating Case Temperature
(See Thermal Considerations section and
TC
090
°C
Storage Temperature
Tstg
–40
125
°C
Parameter
Symbol
Min
Typ
Max
Unit
Operating Input Voltage
VI
36
48
72
Vdc
Maximum Input Current (VI = 0 V to 72 V):
FW050H
FW100H
FW150H
II, max
—
2.0
4.0
6.0
A
Inrush Transient
i2t
—
1.0
A2s
Input Reected-ripple Current, Peak-to-peak
(5 Hz to 20 MHz, 12 H source impedance)
—
20
—
mAp-p
Input Ripple Rejection (120 Hz)
—
60
—
dB