41

ENVIRONMENTAL CHARACTERISTICS

Wire Wound Chip Inductor (Ferrite)

LCWF Series

ELECTRICAL PERFORMANCE TEST

Items

Requirement

Test Methods

Inductance

HP4291 or HP4284

Q

HP4291 or HP4284

SRF

Refer to standard electrical

HP4291

DC Resistance RDC

characteristic spec.

Agilent 34401A

Rated Current IDC

Applied the current to coils, The inductance change

should be less than 10% to initial value

MECHANICAL PERFORMANCE TEST

Items

Requirement

Test Methods

Solderability

The electrodes shall be at least 90%

Lead-free inductor: after fluxing(alpha 100 or equiv),

covered with new solder coating

inductor shall be dipped in a melted solder bath at

245 5 C, 5 0.5 seconds

Resistance to

Appearance: No damage

Pre-heating: 150°C, 1min.

Soldering Heat

Solder Temperature: 260±5°C

Immersion Time: 10±1 seconds

Vibration

Appearance: No damage

Test device shall be soldered on the substrate

L change: within±10% Q

Oscillation Frequency: 10 to 55 to 10Hz for 1 min.

change: within±30%

Amplitude: 1.5 mm

DCR: within specification

Time: 2 hrs for each axis (X, Y&Z), total 6 hrs

CLIMATIC TEST

Items

Requirement

Test Methods

One cycle:

Temperature Cycle

Total: 100 cycles

Measured after exposure in the room condition for 24 hrs

Temperature: 40±2°C

Damp Heat with Load

Appearance: No damage

Relative Humidity: 90 ~ 95%

L change: within±10% Q

Time: 1000 hrs

change: within±30%

Measured after exposure in the room condition for 24 hrs

DCR: within specification

Temperature: 85±3°C

Relative Humidity: 20%

High Temperature Storage

Applied Current: Rated Current

Time: 1000 hrs

Measured after exposure in the room condition for 24 hrs

Temperature: -25±3°C

Low Temperature Storage

Relative Humidity: 0% Time: 1000 hrs

Measured after exposure in the room condition for 24 hrs

Step

Temperature (°C)

Time (min.)

1

-25±3

30

2

25±2

15

3

125±3

30

4

25±2

15