Application Information
The DC current through the inductor is equal to the load
Powered Iron cores are low cost and have a more gradual
saturation curve. The cores with an open magnetic path,
such as rod or barrel, tend to generate high magnetic field
radiation. However, they are usually cheap and small. The
cores providing a close magnetic loop, such as pot-core and
toroid, generate low electro-magnetic interference (EMI).
current. The worse case occurs during maximum load cur-
rent. Check the vendor’s spec to adjust the inductor value
under current loading. Inductors can lose over 50% of
inductance when it nears saturation.
The core materials have a significant effect on inductor per-
formance. The ferrite core has benefits of small physical
size, and very low power dissipation. But be careful not to
operate these inductors too far beyond their maximum rat-
ings for peak current, as this will saturate the core.
There are many magnetic component vendors providing
standard product lines suitable for CS5141X. Table 2 lists
three vendors, their products and contact information.
Part Number
1N5817
VBreakdown (V)
IAVERAGE (A)
V(F) (V) @ I AVERAGE
Package
20
30
40
1
1
1
0.45
0.55
0.6
Axial Lead
Axial Lead
Axial Lead
1N5818
1N5819
MBR0520
MBR0530
20
30
0.5
0.5
0.385
0.43
SOD-123
SOD-123
MBR0540
MBRS120
MBRS130
MBRS140
40
20
30
40
0.5
1
0.53
0.55
0.395
0.6
SOD-123
SMB
1
SMB
1
SMB
Table 1.
Vendor
Product Family
Web Site
Telephone
Coiltronics
UNI-Pac1/ 2: SMT, barrel
THIN-PAC: SMT, toroid, low profile
CTX: Leaded, toroid
www.coiltronics.com
(516) 241-7876
Coilcraft
DO1608: SMT, barrel
www.coilcraft.com
(800) 322-2645
DS/ DT 1608: SMT, barrel
Magnetically shielded
DO3316: SMT, barrel
DS/ DT 3316: SMT, barrel
magnetically shielded
DO3308: SMT, barrel, low profile
Pulse
www.pulseeng.com
(619) 674-8100
Table 2
11
CHERRY [ CHERRY SEMICONDUCTOR CORPORATION ]
