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Fabricante

LW020A

Single-Output-Series Power Modules: 36 Vdc to 75 Vdc Inputs; 20 W

General Semiconductor 

LW020 Single-Output-Series Power Modules:

36 Vdc to 75 Vdc Inputs; 20 W

Data Sheet

April 2008

Characteristics Curves (continued)

Test Configurations

101%

VO, nom

100%

VO, nom

TO OSCILLOSCOPE

BATTERY

LTEST

12 µH

CS 220 µF

IMPEDANCE < 0.1 Ω

@ 20 ˚C, 100 kHz

CURRENT

PROBE

33 µF

VI(+)

VI(-)

50%

IO, max

25%

IO, max

TIME, t (100 µs/div)

8-1261(C).b

Figure 9. LW020A, B, C, F, and G Typical Output

Voltage for a Step Load Change from 50%

to 25%

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 11. Input Reflected-Ripple Test Setup

V O (+)

V O (-)

COPPER STRIP

0.1 µF SCOPE

RESISTIVE

LOAD

5V

0

100%

VO, nom

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 12. Peak-to-Peak Output Noise

Measurement Test Setup

50%

VO, nom

0

TIME, t (1 ms/div)

8-1263(C).b

Figure 10. LW020A, B, C, F, and G Typical Output

Voltage Start-Up when Signal Applied to

Remote On/Off

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 13. Output Voltage and Efficiency

Measurement Test Setup

8

Lineage Power

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