LW025F Ver la hoja de datos (PDF) - Tyco Electronics
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LW025F Datasheet PDF : 16 Pages
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LW025 Single-Output-Series Power Modules:
36 Vdc to 75 Vdc Inputs; 25 W
Advance Data Sheet
March 1999
Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings can cause permanent damage to the devices. These are
absolute stress ratings only. Functional operation of the devices 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
Transient (100 ms)
Operating Case Temperature (See Figure 16.)
Storage Temperature
I/O Isolation Voltage
Symbol
Min
VI
0
VI, trans
0
TC
–40
Tstg
–40
—
—
Max
80
100
110*
120
1500
* Maximum case temperature varies based on power dissipation. See derating curves, Figures 15—16, for details.
Unit
Vdc
V
°C
°C
Vdc
Electrical Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature
conditions.
Table 1. Input Specifications
Parameter
Symbol Min
Typ
Max
Unit
Operating Input Voltage
VI
36
48
75
Vdc
Maximum Input Current
II, max
—
—
1.2
A
(VI = 0 V to VI, max; IO = IO, max; see Figures 1 and 2.)
Inrush Transient
i2t
—
—
0.1
A2s
Input Reflected-ripple Current
(50 Hz to 20 MHz; 12 µH source impedance,
TC = 25 °C; see Figure 10.)
II
—
3
—
mAp-p
Input Ripple Rejection (100 Hz—120 Hz)
—
—
60
—
dB
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 fuse with a maximum rating of 5 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.
2
Tyco Electronics Corp.
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