TDK VLM10555-2 User Manual

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SMD Inductors(Coils)
For Power Line(Wound, Magnetic Shielded)

VLM Series VLM10555-2

FEATURES

• Low loss and large current capability design.

• High magnetic shield construction should actualize high resolu­tion for EMC protection.

• Available for automatic mounting in tape and real package.

APPLICATIONS

Note book type and mobile computers, amusement equipment,
DVD players, VRMs, plasma displays, etc.

SHAPES AND DIMENSIONS

1R8M

10.6±0.2

RECOMMENDED PC BOARD PATTERN

8.7

3.7

Conformity to RoHS Directive

10.5max.5.4±0.2

Dimensions in mm

1.8

3.92.7

11.5
Dimensions in mm

ELECTRICAL CHARACTERISTICS

Rated current(A)
Based on inductance change
max.(typ.)

Par t No.

Inductance
(µH)

Inductance
tolerance
(%)

Test frequency
(kHz)

DC resistance
(mΩ)

[±15%] typ. [at 25°C] [at 100°C]
VLM10555T-1R8M8R8-2 1.8 ±20 100 5.6 5.6 18(20) 14(16) 8.8
VLM10555T-2R5M8R0-2 2.5 ±20 100 6.7 6.7 15(17) 12(14) 8
VLM10555T-3R3M7R2-2 3.3 ±20 100 8.3 8.3 12(14) 10(12) 7.2
VLM10555T-4R3M7R2-2 4.3 ±20 100 8.3 8.3 9(11) 7(9) 7.2

∗

Rated current: Value obtained when current flows and the temperature has risen to 40°C or when DC current flows and the nominal value of inductance
has fallen by 30%, whichever is smaller.

∗

Based on
temperature rise
typ.

TYPICAL ELECTRICAL CHARACTERISTICS

INDUCTANCE CHANGE vs. DC SUPERPOSITION

TEMPERATURE RISE CHARACTERISTICS

CHARACTERISTICS

4.5

4.0

3.5

)

3.0

µH

(

2.5

2.0

1.5

Inductance

1.0

0.5

0.0
0 5 10 15 20 25

DC current(A

1.8µH[at 25˚C

2.5µH[at 25˚C

3.3µH[at 25˚C

4.3µH[at 25˚C

]
]
]
]

)

1.8µH[at 100˚C

2.5µH[at 100˚C

3.3µH[at 100˚C

4.3µH[at 100˚C

]
]
]
]

60
55

)

50

˚C
(

45
40
35
30
25
20
15

Self-temperature rise

10

5
0

1.8µH

2.5µH

3.3µH/4.3µH

024681012

DC current(A

)

• Conformity to RoHS Directive: This means that, in conformity with EU Directive 2002/95/EC, lead, cadmium, mercury, hexavalent chromium, and specific
bromine-based flame retardants, PBB and PBDE, have not been used, except for exempted applications.

• All specifications are subject to change without notice.

001-03 / 20080822 / e531_vlm10555_2.fm