Coupled Inductors
Document 922-1
Coupled Inductors–MSC1278
For SEPIC Applications
The MSC1278 coupled inductors are designed with high ...
Description
Document 922-1
Coupled Inductors–MSC1278
For SEPIC Applications
The MSC1278 coupled inductors are designed with high leakage inductance for use in SEPIC applications. The loosely coupled windings (K ≈ 0.8) improve SEPIC efficiency by reducing circulating current and provide twice the ripple current reduction of separate inductors.
These inductors offer high efficiency and excellent current handling in a rugged, low cost part. They are well suited for use as a VRM inductors in high-current DC-DC converters and VRM/VRD controllers.
They can also be used as two single inductors connected in series or parallel.
01.428,34max
01.428,34max
123 X
Dot indicates pin1 Dash number
Internal code
0.317 8,05
max
0.197 5,0
0.197 5,0
34 21
0.138 3,5
0.059 1,5
Dimensions
are
in
inches mm
Recommended Land Pattern
0.157 4,0
0.217 5,5
2 1 0.177 3 4 4,5
0.079 2,0
12 L1 L2 34
1:1
+ L1
VIN Q1
C1 L2
D1 +
C2
+ Load VOUT
––
Typical SEPIC schematic Refer to Application Note, Document 639, “Selecting Coupled Inductors for SEPIC Applications.” Visit http://www.coilcraft.com/apps/sepic/selector_2.cfm for the Coilcraft on-line SEPIC Inductor Selector tool.
Core material Ferrite Core and winding loss Go to online calculator Terminations RoHS compliant matte tin over nickel over phos bronze. Other terminations available at additional cost. Ambient temperature –40°C to +85°C with Irms current, +85°C to +125°C with derated current Storage temperature Component: –40°C to +125°C. Ta...
Similar Datasheet