2
Technical Data 10449
Effective October 2015
FP1108L3 and FP1108L4
High frequency, high current power inductors
www.eaton.com/elx
Product Specifications
Part Number
8
OCL
1
(nH) ±10%
FLL
2
(nH)
minimum
I
rms
3
(amps)
I
sat
1
4
(amps)
I
sat
2
5
(amps)
I
sat
3
6
(amps)
DCR (mΩ)
±10% @ 20°C K-factor
7
L3 Version
FP1108L3-R105-R 105 76 91 57 48 45 0.05 552
L4 Version
FP1108L4-R120-R 120 86 91 50 42 40 0.05 552
FP1108L4-R150-R 150 108 91 40 34 32 0.05 552
FP1108L4-R180-R 180 129 91 33 28 26 0.05 552
1. Open Circuit Inductance (OCL) Test Parameters: 100kHz, 0.1Vrms, 0.0Adc, @ +25°C
2. Full Load Inductance (FLL) Test Parameters: 100kHz, 0.1Vrms, @ I
sat
1, @ +25ºC
3. I
rms
: DC current for an approximate temperature rise of 40°C without core loss. This is for reference only and does not
represent absolute maximum ratings. Derating is necessary for AC currents. PCB layout, trace thickness and width,
air-flow, and proximity of other heat generating components will affect the temperature rise. It is recommended that
the temperature of the part not exceed 125°C under worst case operating conditions verified in the end application.
4. I
sat
1
: Peak current for approximately 20% rolloff @ +25°C
5. I
sat
2
: Peak current for approximately 20% rolloff @ +100°C
6. I
sat
3
: Peak current for approximately 20% rolloff @ +125°C
7. K-factor: Used to determine B
p-p
for core loss (see graph). Bp-p = K * L * ΔI * 10
-3
B
p-p
: (Gauss),
K: (K-factor from table), L: (Inductance in nH), ΔI (Peak to peak ripple current in Amps).
8. Part Number Definition: FP1108Lx-Rxxx-R
FP1108L = Product code and size
x= Version indicator
Rxxx= inductance value in μH, R= decimal point ,
-R suffix = RoHS compliant
Dimensions (mm)
Part marking: 1108Lx (x = Version indicator), Rxxx = Inductance value in uH (R= decimal point)
wwllyy = date code, R = revision level
All soldering surfaces to be coplanar within 0.1 millimeters
PCB tolerances are ±0.1 millimeters unless otherwise specified
DCR measured from point “a” to point “b”
Do not route traces or vias underneath the inductor
Recommended Pad Layout Schematic
1108Lx
Rxxx
wwllyy R
a
b
8.6
3.5
4.0
3.0
1.7
3.6
nom
8.0
max
8.0
max
11.0
