Coupled Inductors
Description
Document 621-1
Coupled Inductors MSD7342 ForFlyback,SEPIC,Zeta and other Applications
• Tight coupling (k ≥ 0.
97) and 200 V isolation make the MSD7342 series of coupled inductors ideal for use in a variety of circuits including flyback, multi-output buck and SEPIC.
• They provide high inductance, high efficiency and excellent current handling in a rugged, low cost part.
• Can also be used as two single inductors connected in series or parallel, as a common mode choke or as a 1 : 1 transformer.
0.
72,955max
0.
72,955max
123
Dot indicates pin 1
1 L1 3
2 L2 4
04.
1,681max
0.
150 3,8
0.
028 0,7
0.
091 2,3
34 21
0.
063 1,6
Dimensions
are in
inches mm
Recommended Land Pattern
0.
083 2,1
If board traces are run in these areas, consider masking them to prevent shorting.
0.
110 2,8
21 34
0.
130 3,3
0.
043 1,10
+ 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
–
Specifications subject to change without notice.
Please check our website for latest information.
Document 621-1 Revised 11/09/15
Document 621-2
Coupled Inductors– MSD7342 Series
Inductance2 DCR max3 SRF typ4
cCooeuffpicliinegn t L eLatkyapg5e
10%
Isat (A)6 Irms (A)
20% 30%
both
one
Part number1
±20% (µH) (Ohms) (MHz)
typ
(µH) drop drop drop windings7 winding8
MSD7342-252ML_ MSD7342-332ML_ MSD7342-472ML_ MSD7342-562ML_ MSD7342-682ML_
2.
5 0.
033 55 3.
3 0.
037 43 4.
7 0.
051 35 5.
6 0.
063 32 6.
8 0.
070 30
0.
97 0.
14 6.
0 6.
2 6.
3 0.
99 0.
09 5.
2 5.
3 5.
4 0.
99 0.
11 4.
1 4.
3 4.
6 0.
99 0.
09 3.
9 4.
1 4.
2 0.
99 0.
14 3.
7 3.
8 3.
9
2.
17 3.
06 2.
05 2.
89 1.
74 2.
46 1.
57 2.
22 1.
49 2.
10
MSD7342-822ML_ MSD7342-103ML_ MSD7342-123ML_ MSD7342-153ML_ MSD7342-183ML_
8.
2 0.
075 27 10 0.
100...
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