Document 1190-1
Coupled Inductors MSD1048 ForFlyback,SEPIC,Zeta and other Applications
01.400,36max
01.400,36max
123 X
Dot indicates pin1 1
Dash number
L1
Internal code
3
2 L2
4
0.118 3,0
0.189 ±0.008*
4,8 ±0,2
Recommended Land Pattern
0.130 3,3
0.228 5,8
34 21
0.079 2,0
21
0.094 2,4
0.213 5,4
34
0.039 1,0
*
For optional tin-lead and tin-silver-copper terminations, dimensions are for the mounted
part. Dimensions before mounting can be
an additional 0.012 inch (0,3 mm).
0.
Coupled Inductors
Document 1190-1
Coupled Inductors MSD1048 ForFlyback,SEPIC,Zeta and other Applications
01.400,36max
01.400,36max
123 X
Dot indicates pin1 1
Dash number
L1
Internal code
3
2 L2
4
0.118 3,0
0.189 ±0.008*
4,8 ±0,2
Recommended Land Pattern
0.130 3,3
0.228 5,8
34 21
0.079 2,0
21
0.094 2,4
0.213 5,4
34
0.039 1,0
*
For optional tin-lead and tin-silver-copper terminations, dimensions are for the mounted
part. Dimensions before mounting can be
an additional 0.012 inch (0,3 mm).
0.049 1.25
Dimensions
are
in
inches mm
• Tight coupling (k ≥ 0.97) • 200 V isolation • Ideal for use in a variety of circuits including flyback, multi-output
buck, SEPIC, Ćuk and Zeta. • High efficiency and excellent current handling • Can also be used as two single inductors connected in series
or parallel, as a common mode choke or as a 1 : 1 transformer.
+ D
L1 L2 C
VIN C SW
–
Typical Flyback Converter
+ VOUT
–
L2 D C
+ VOUTAUX
–
++
L1
VIN SW D
C
VOUT
––
Typical Buck Converter with auxiliary output
+
VIN C
L1 Q
C1 L2
D C
+
VOUT
–– Typical SEPIC schematic
+
VIN C
–
Q C1 L2
L1 D
C
Typical Zeta schematic
+
VOUT
–
Document 1190-1 Revised 11/09/15
Document 1190-2
Coupled Inductors – MSD1048 Series
Coupling Leakage Irms (A)
Part
Inductance2 DCR max3 SRF typ4 coefficient Inductance5 Isat6 both one
number1
(µH)
(Ohms)
(MHz)
typ
typ (µH)
(A) windings7 winding8
MSD1048-222NE_ 2.2 ±30% MSD1048-103ME_ .