Features
Applications
nꢀ Multipleꢀapplications:ꢀparallel,ꢀseries,ꢀꢀ
nꢀ Automotiveꢀsystems:ꢀ
ꢀ
dual-inductorꢀandꢀtransformer
ꢀ
-ꢀꢀDriverꢀassistantꢀꢀꢀꢀꢀꢀ-ꢀꢀEntertainmentꢀ
-ꢀꢀInformationꢀ ꢀꢀꢀꢀꢀ-ꢀꢀLighting
ꢀ
nꢀ Magneticallyꢀshielded,ꢀlowꢀradiation
nꢀꢀInductanceꢀrange:ꢀ0.47ꢀtoꢀ4000ꢀμH
nꢀꢀRatedꢀcurrentꢀupꢀtoꢀ17.9ꢀA
1
0
1
nꢀ DC/DCꢀconverters
nꢀ Powerꢀsupplies
nꢀ SEPICꢀ-ꢀDC/DCꢀconverters
nꢀ AEC-Q200ꢀqualified
nꢀ RoHSꢀcompliant*ꢀandꢀhalogenꢀfree**
ꢀ ꢀꢀSRF1280AꢀSeriesꢀ-ꢀDual-WindingꢀShieldedꢀPowerꢀInductors
Electrical Specifications @ 25 °C
General Specifications
Test Voltage..................................0.25 V
Operating Temperature
................................-40 °C to +125 °C
(Temperature rise included)
Storage Temperature
................................-40 °C to +125 °C
Resistance to Solder Heat
.............................+245 °C for 10 sec.
Temperature Rise
.......................40 °C typ. at rated Irms
Inductance drop...................30 % at Isat
Parallel Rating
Series Rating
Inductance
DCR
(W)
Max.
Inductance
DCR
(W)
Max.
Bourns
Part No.
@ 100 KHz Tol.
Irms Isat @ 100 KHz Tol.
Irms Isat
L (μH)
(%)
(A)
(A)
L (μH)
(%)
(A)
(A)
SRF1280A-R47Y
SRF1280A-1R0Y
SRF1280A-1R5Y
SRF1280A-2R2Y
SRF1280A-3R3Y
SRF1280A-4R7Y
SRF1280A-6R8Y
SRF1280A-8R2Y
SRF1280A-100M
SRF1280A-150M
SRF1280A-220M
SRF1280A-330M
SRF1280A-470M
SRF1280A-680M
SRF1280A-820M
SRF1280A-101M
SRF1280A-151M
SRF1280A-221M
SRF1280A-331M
SRF1280A-471M
SRF1280A-681M
SRF1280A-821M
SRF1280A-102M
0.47
1.0
1.5
2.2
3.3
4.7
6.8
8.2
10
15
22
33
47
± 30 0.0055
± 30 0.0067
± 30 0.0076
± 30 0.0092
17.9
15.5
13.5
12.5
10.4
8.25
7.34
6.32
6.04
5.03
4
3.23
2.95
2.44
2.09
1.96
1.59
1.29
1.04
0.85
0.76
0.65
0.61
56
40
1.88
4
6
± 30 0.0216 8.94
± 30 0.026 7.74
± 30 0.0306 6.77 15.6
± 30 0.0338 6.23 12.7
28
20
31.1
25.5
21.5
16.5
13.3
12.2
11.2
9.66
7.57
6.22
5.28
4.44
4.06
3.64
3.01
2.43
2.01
1.68
1.39
1.27
1.14
8.8
± 30
0.011
13.2
18.8
27.2
32.8
40
± 30
± 30
0.04
0.05
5.23 10.8
4.13 8.24
± 30 0.0135
± 30 0.0183
± 30 0.0191
± 20 0.0241
± 20 0.0333
± 20 0.0503
± 20 0.0664
± 20 0.0898
± 30 0.0656 3.67 6.67
± 30 0.0714 3.16 6.09
± 20 0.0921 3.02
5.6
2.51 4.83
Materials
60
88
± 20 0.129
± 20 0.192
± 20 0.265
± 20 0.353
± 20 0.469
± 20 0.578
± 20 0.701
± 20 1.013 0.796 1.51
± 20 1.38 0.645 1.22
± 20 2.172 0.522 1.01
Core..............................................Ferrite
Wire ............................Enameled copper
Terminal Finish ...................................Sn
Packaging....................400 pcs. per reel
2
1.61
3.78
3.11
132
188
272
328
400
600
880
1320
1880
2720
3280
4000
1.47 2.64
1.22 2.22
1.04 2.03
0.98 1.82
68
82
± 20
± 20
± 20
± 20
± 20
± 20
± 20
± 20
± 20
± 20
0.123
0.153
0.175
0.261
0.343
0.54
0.865
1.296
1.632
1.992
Product Dimensions
100
150
220
330
470
680
820
1000
12.50
MAX.
(.492)
± 20
3.3
0.427 0.838
0.38 0.697
± 20 4.888
± 20 5.896 0.325 0.633
± 20 7.202 0.307 0.571
12.50
(.492)
MAX.
Electrical Schematic
1
2
1
2
1
2
8.00
(.315)
MAX.
N1
N2
N1
N2
N1
N2
3
4
3
4
3
4
5.00 0.3
(.197 .012)
PARALLEL
SERIES
5.00 0.3
(.197 .012)
2
1
4
Recommended Layout
4.50
(.177)
4.50
(.177)
2.15
(.085)
2.15
(.085)
3
2
3
ꢀ
MM
(INCHES)
DIMENSIONS:
2
3
1
4
1
4
ꢀ
1.80 0.2
(.071 .008)
13.00
(.512)
13.00
(.512)
ꢀ
MM
(INCHES)
DIMENSIONS:
ꢀ
1.28
(.050)
1.28
(.050)
How to Order
SRF1280A - 100M
DUAL INDUCTOR MODE
SERIES MODE
Model
Value Code (see table)
*ꢀ RoHSꢀDirectiveꢀ2002/95/ECꢀJan.ꢀ27,ꢀ2003ꢀincludingꢀannexꢀandꢀRoHSꢀRecastꢀ2011/65/EUꢀJuneꢀ8,ꢀ2011.ꢀ
**ꢀ Bournsꢀfollowsꢀtheꢀprevailingꢀdefinitionꢀofꢀ“halogenꢀfree”ꢀinꢀtheꢀindustry.ꢀꢀBournsꢀconsidersꢀaꢀproductꢀtoꢀbeꢀ
ꢀ
ꢀ
ꢀ“halogenꢀfree”ꢀifꢀ(a)ꢀtheꢀBromineꢀ(Br)ꢀcontentꢀisꢀ900ꢀppmꢀorꢀless;ꢀ(b)ꢀtheꢀChlorineꢀ(Cl)ꢀcontentꢀisꢀ900ꢀppmꢀorꢀless;ꢀꢀ
andꢀ(c)ꢀtheꢀtotalꢀBromineꢀ(Br)ꢀandꢀChlorineꢀ(Cl)ꢀcontentꢀisꢀ1500ꢀppmꢀorꢀless.
Specificationsꢀareꢀsubjectꢀtoꢀchangeꢀwithoutꢀnotice.
Theꢀdeviceꢀcharacteristicsꢀandꢀparametersꢀinꢀthisꢀdataꢀsheetꢀcanꢀandꢀdoꢀvaryꢀinꢀdifferentꢀapplicationsꢀandꢀactualꢀꢀ
deviceꢀperformanceꢀmayꢀvaryꢀoverꢀtime.
Usersꢀshouldꢀverifyꢀactualꢀdeviceꢀperformanceꢀinꢀtheirꢀspecificꢀapplications.
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