Features
Applications
nꢀ Multipleꢀapplications:ꢀparallel,ꢀseries,ꢀ
nꢀ SEPICꢀtopology
dual-inductorꢀandꢀtransformer
nꢀ Powerꢀsuppliesꢀfor:ꢀ
nꢀ Magneticallyꢀshielded,ꢀlowꢀradiation
nꢀ Inductanceꢀrange:ꢀ0.47ꢀtoꢀ4000ꢀμH
nꢀ Ratedꢀcurrentꢀupꢀtoꢀ17.9ꢀA
nꢀ RoHSꢀcompliant*
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀꢀꢀꢀꢀ-ꢀCommunicationꢀequipmentꢀ
ꢀꢀꢀꢀꢀ-ꢀNotebooks,ꢀdesktopꢀcomputers,ꢀꢀ
ꢀꢀꢀꢀꢀꢀꢀꢀserversꢀ
ꢀꢀꢀꢀꢀ-ꢀLCDs,ꢀflatꢀpanels,ꢀbacklightsꢀ
ꢀꢀꢀꢀꢀ-ꢀCamcorders,ꢀHDTVs
1
0
1
SRF1280 Series - Dual-Winding Shielded Power Inductors
Electrical Specifications @ 25 °C
Additional Information
Click these links for more information:
Parallel Rating
Series Rating
Inductance
@ 100 KHz Tol.
DCR
(W)
Inductance
Irms Isat @ 100 KHz Tol.
DCR
(W)
Bourns
Part No.
Irms
(A)
Isat
(A)
L (μH)
0.47
1.0
1.5
2.2
3.3
4.7
6.8
8.2
10
15
22
33
47
68
82
100
150
220
330
470
680
820
1000
(%)
Max.
(A)
(A)
L (μH)
1.88
4
6
8.8
13.2
18.8
27.2
32.8
40
(%)
Max.
SRF1280-R47Y
SRF1280-1R0Y
SRF1280-1R5Y
SRF1280-2R2Y
SRF1280-3R3Y
SRF1280-4R7Y
SRF1280-6R8Y
SRF1280-8R2Y
SRF1280-100M
SRF1280-150M
SRF1280-220M
SRF1280-330M
SRF1280-470M
SRF1280-680M
SRF1280-820M
SRF1280-101M
SRF1280-151M
SRF1280-221M
SRF1280-331M
SRF1280-471M
SRF1280-681M
SRF1280-821M
SRF1280-102M
±30 0.0055 17.9 56
±30 0.0067 15.5 40
±30 0.0076 13.5 31.1
±30 0.0092 12.5 25.5
±30 0.011 10.4 21.5
±30 0.0135 8.25 16.5
±30 0.0183 7.34 13.3
±30 0.0191 6.32 12.2
±20 0.0241 6.04 11.2
±20 0.0333 5.03 9.66
±30 0.0216 8.94
±30 0.026 7.74
±30 0.0306 6.77 15.6
±30 0.0338 6.23 12.7
5.23 10.8
4.13 8.24
±30 0.0656 3.67 6.67
±30 0.0714 3.16 6.09
28
20
PRODUCT TECHNICAL INVENTORY SAMPLES CONTACT
LIBRARY
General Specifications
±30 0.04
±30 0.05
Test Voltage..................................0.25 V
Hi-pot.................500 Vrms, 3 mA, 3 sec.
Operating Temperature
................................. -40 °C to +125 °C
(Temperature rise included)
Storage Temperature .. -40 °C to +125 °C
Moisture Sensitivity Level ...................... 1
ESD Classification (HBM).................. N/A
±20 0.0921 3.02
±20 0.129 2.51 4.83
±20 0.192 3.78
5.6
60
88
±20 0.0503
4
7.57
2
±20 0.0664 3.23 6.22
±20 0.0898 2.95 5.28
±20 0.123 2.44 4.44
±20 0.153 2.09 4.06
±20 0.175 1.96 3.64
±20 0.261 1.59 3.01
±20 0.343 1.29 2.43
132
188
272
328
400
600
880
1320
1880
2720
3280
4000
±20 0.265 1.61 3.11
±20 0.353 1.47 2.64
±20 0.469 1.22 2.22
±20 0.578 1.04 2.03
±20 0.701 0.98 1.82
±20 1.013 0.796 1.51
±20 1.38 0.645 1.22
±20 2.172 0.522 1.01
Product Dimensions
12.50
MAX.
(.492)
DOT
INDICATES
±20
0.54 1.04 2.01
TERMINAL 1
12.50
±20 0.865 0.85 1.68
±20 1.296 0.76 1.39
±20 1.632 0.65 1.27
±20 1.992 0.61 1.14
±20
3.3
0.427 0.838
(.492)
MAX.
±20 4.888 0.38 0.697
±20 5.896 0.325 0.633
±20 7.202 0.307 0.571
Electrical Schematic
8.00
MAX.
(.315)
1
2
1
2
1
2
N1
N2
N1
N2
N1
N2
5.00 0.ꢀ
(.197 .01ꢁ2
3
2
4
1
5.00 0.ꢀ
(.197 .01ꢁ2
3
4
3
4
3
4
PARALLEL
SERIES
Recommended Layout
4.50
(.1772
4.50
(.1772
ꢁ.15
(.0852
ꢁ.15
(.0852
1.80 0.2
(.071 .008)
1
2
3
1
2
3
MM
(INCHES)
DIMENSIONS:
1ꢀ.00
(.51ꢁ2
1ꢀ.00
(.51ꢁ2
4
4
1.ꢁ8
(.0502
1.ꢁ8
(.0502
DUAL INDUCTOR MODE
SERIES MODE
*RoHSꢀDirectiveꢀ2015/863,ꢀMarꢀ31,ꢀ2015ꢀandꢀAnnex.
WARNING
Specificationsꢀareꢀsubjectꢀtoꢀchangeꢀwithoutꢀnotice.ꢀUsersꢀshouldꢀverifyꢀactualꢀdeviceꢀperformanceꢀinꢀtheirꢀspecificꢀ
applications.ꢀTheꢀproductsꢀdescribedꢀhereinꢀandꢀthisꢀdocumentꢀareꢀsubjectꢀtoꢀspecificꢀlegalꢀdisclaimersꢀasꢀsetꢀforthꢀonꢀtheꢀ
lastꢀpageꢀofꢀthisꢀdocument,ꢀandꢀatꢀwww.bourns.com/docs/legal/disclaimer.pdf.
Cancer and Reproductive Harm
www.P65Warnings.ca.gov