LW025F Ver la hoja de datos (PDF) - Tyco Electronics
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componentes Descripción
Fabricante
LW025F Datasheet PDF : 16 Pages
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Advance Data Sheet
March 1999
LW025 Single-Output-Series Power Modules:
36 Vdc to 75 Vdc Inputs; 25 W
Characteristics Curves (continued)
Test Configurations
5V
0
0
TIME, t (1 ms/div)
8-1263(C).e
Figure 9. LW025A, F Typical Output Voltage Start-
Up when Signal Is Applied to Remote
On/Off
TO OSCILLOSCOPE
BATTERY
LTEST
12 µH
CS 220 µF
IMPEDANCE < 0.1 Ω
@ 20 ˚C, 100 kHz
CURRENT
PROBE
33 µF
VI(+)
VI(-)
8-203(C)
Note: Input reflected-ripple current is measured with a simulated
source impedance of 12 µH. Capacitor Cs offsets possible
battery impedance. Current is measured at the input of the
module.
Figure 10. Input Reflected-Ripple Test Setup
VO(+)
VO(-)
COPPER STRIP
0.1 µF
SCOPE
RESISTIVE
LOAD
8-513(C)
Note: Use a 0.1 µF ceramic capacitor. Scope measurement should
be made using a BNC socket. Position the load between
50 mm and 75 mm (2 in. and 3 in.) from the module.
Figure 11. Peak-to-Peak Output Noise
Measurement Test Setup
Tyco Electronics Corp.
II
SUPPLY
VI(+) VO(+)
CONTACT AND
DISTRIBUTION LOSSES
IO
LOAD
CONTACT RESISTANCE
VI(-) VO(-)
8-204(C)
Note: All measurements are taken at the module terminals. When
socketing, place Kelvin connections at module terminals to
avoid measurement errors due to socket contact resistance.
η
=
[---V--[--O-V---(-I-+(--+--)-)--–--–---V-V---O--I-(-(-–-–--)--)]--]I--II---O--
× 100
%
Figure 12. Output Voltage and Efficiency
Measurement Test Setup
7
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