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LC010D

Power Modules: 18 Vdc to 36 Vdc or 36 Vdc to 75 Vdc Inputs, 10 W and 15 W

Tyco Electronics 

LC/LW010- and LC/LW015-Series Power Modules:

18 Vdc to 36 Vdc or 36 Vdc to 75 Vdc Inputs, 10 W and 15 W

Data Sheet

August 1998

Test Configurations

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 33. Input Reflected-Ripple Test Setup

VO(+)

VO(–)

COPPER STRIP

0.47 µF 0.47 µF SCOPE

RESISTIVE

LOAD

8-513(C).g

Note: Use two 0.47 µF ceramic capacitors. 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 34. Peak-to-Peak Output Noise

Measurement Test Setup for Single

Outputs

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--I-I--O--

× 100

VO1(+ )

COM

COPPER STRIP

0.47 µF

0.47 µF

SCOPE RLOAD1

VO2(-)

0.47 µF

0.47 µF SCOPE RLOAD2

8-808(C).d

Note: Use four 0.47 µF ceramic capacitors. 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 36. Peak-to-Peak Output Noise

Measurement Test Setup for Dual

Outputs

II

SUPPLY

VI(+)

VO1

COM

CONTACT AND

DISTRIBUTION LOSSES

IO

LOAD

LOAD

CONTACT

RESISTANCE

VI(-)

VO2

8-863(C).a

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.

2

∑ [VOJ – COM]IOJ

η=

J----=---1-------------------------------------------

[VI(+) – VI(–)]II

x 100

Figure 37. Output Voltage and Efficiency

Measurement Test Setup for Dual

Outputs

Figure 35. Output Voltage and Efficiency

Measurement Test Setup for Single

Outputs

14

Tyco Electronics Corp.

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