1260 COUPLED INDUCTORS
High Reliability Coupled Inductors
ML590PND
The ML590PND series of shielded coupled inductors
was designed specifically for high temperature applica-
tions – up to 155°C. The excellent coupling coefficient
(k
≥
0.94) makes it ideal for use in SEPIC applications.
In SEPIC topologies, the required inductance for each
winding in a coupled inductor is half the value needed
for two separate inductors, allowing selection of a part
with lower DCR and higher current handling.
These parts provide high inductance, high efficiency and
excellent current handling in a very rugged part. They
are well suited for use as VRM inductors in high-current
DC-DC and VRM/VRD controllers.
They can also be used as two single inductors con-
nected in series or parallel, as a common mode choke
or as a 1 : 1 transformer.
0.484
max
12,3
D1
+
L1
C1
Dot indicates pin1
Dash number
Internal code
+
+
V
OUT
0.484
max
12,3
123
X
V
IN
Q1
L2
C2
Load
–
–
Typical SEPIC schematic
0.236 ±0.008
6,0 ±0,2
Refer to Application Note, Document 639,
“Selecting Coupled Inductors for SEPIC Applications”
Recommended
Land Pattern
0.197
5,0
0.138
3,5
0.157
4,0
2
3
0.217
5,5
0.197
5,0
3
2
4
1
0.177
4,5
4
1
0.059
1,5
0.079
2,0
inches
Dimensions are in
mm
1
L1
3
2
L2
4
Core material
Ferrite
Terminations
Matte tin over nickel over phos bronze
Weight:
2.8 – 3.2 g
Ambient temperature
–55°C to +105°C with
Irms
current, +105°C
to +155°C with derated current
Storage temperature
Component: –55C to +155°C.
Packaging: –55°C to +80°C
Winding to winding isolation
500 Vrms
Resistance to soldering heat
Max three 40 second reflows at
+260°C, parts cooled to room temperature between cycles
Moisture Sensitivity Level (MSL)
1 (unlimited floor life at <30°C /
85% relative humidity)
Enhanced crush-resistant packaging
500/13″ reel;
Plastic tape: 24 mm wide, 0.35 mm thick, 16 mm pocket spacing,
6.6 mm pocket depth
®
Specifications subject to change without notice.
Please check our website for latest information. Document ML703-1
Revised 07/06/10
1102 Silver Lake Road
Cary IL 60013
© Coilcraft, Inc. 2010
Phone 800-981-0363
Fax 847-639-1508
E-mail cps@coilcraft.com
Web www.coilcraft-cps.com
1260 COUPLED INDUCTORS
ML590PND Series (1260)
Inductance
2
Part number
1
ML590PND472MLZ
ML590PND562MLZ
ML590PND682MLZ
ML590PND822MLZ
ML590PND103MLZ
ML590PND123MLZ
ML590PND153MLZ
ML590PND183MLZ
ML590PND223MLZ
ML590PND273MLZ
ML590PND333MLZ
ML590PND393MLZ
ML590PND473MLZ
ML590PND563MLZ
ML590PND683MLZ
ML590PND823MLZ
ML590PND104MLZ
ML590PND124KSZ
ML590PND154KSZ
ML590PND184KSZ
ML590PND224KSZ
ML590PND274KSZ
ML590PND334KSZ
ML590PND394KSZ
ML590PND474KSZ
ML590PND564KSZ
ML590PND684KSZ
ML590PND824KSZ
ML590PND105KSZ
(µH)
4.7 ±20%
5.6 ±20%
6.8 ±20%
8.2 ±20%
10 ±20%
12
15
18
22
27
33
39
47
56
68
82
100
120
150
180
220
270
330
390
470
560
680
820
1000
±20%
±20%
±20%
±20%
±20%
±20%
±20%
±20%
±20%
±20%
±20%
±20%
±10%
±10%
±10%
±10%
±10%
±10%
±10%
±10%
±10%
±10%
±10%
±10%
DCR max
3
(Ohms)
0.036
0.040
0.048
0.052
0.060
0.074
0.085
0.097
0.116
0.124
0.134
0.142
0.174
0.198
0.216
0.274
0.322
0.418
0.476
0.536
0.691
0.806
1.09
1.20
1.59
1.81
2.06
2.65
3.06
SRF (MHz)
4
min
typ
30.0
38.0
24.0
30.0
22.0
27.0
21.0
26.0
18.0
22.0
16.0
14.4
13.0
12.0
10.0
10.0
9.6
9.3
8.4
8.0
6.9
6.2
5.5
5.1
4.9
4.4
3.4
3.2
2.9
2.4
2.2
2.1
2.0
1.9
20.0
18.0
16.0
15.0
13.0
12.4
12.0
11.6
10.5
10.0
8.6
7.8
6.8
6.4
6.1
5.5
4.3
4.0
3.6
3.0
2.8
2.6
2.5
2.4
10% drop
9.00
8.00
7.00
6.44
5.40
5.30
4.60
4.50
4.00
3.60
3.30
3.00
2.70
2.50
2.30
2.10
1.90
1.60
1.50
1.40
1.30
1.10
1.00
0.950
0.900
0.800
0.700
0.640
0.590
Isat
(A)
5
20% drop 30% drop
10.18
11.08
9.06
9.84
8.00
8.64
7.38
7.98
6.32
6.88
6.18
5.30
5.22
4.62
4.14
3.80
3.48
3.12
2.90
2.66
2.40
2.18
1.84
1.76
1.64
1.48
1.30
1.16
1.11
0.994
0.908
0.804
0.732
0.674
6.70
5.80
5.68
5.02
4.50
4.14
3.82
3.40
3.14
2.88
2.60
2.38
2.04
1.92
1.78
1.60
1.40
1.26
1.23
1.09
0.948
0.874
0.802
0.728
Irms
(A)
both
one
windings
6
winding
7
3.16
4.47
3.00
4.24
2.75
3.88
2.63
3.72
2.45
3.46
2.21
2.06
1.93
1.76
1.70
1.64
1.59
1.44
1.35
1.29
1.15
1.06
0.93
0.87
0.82
0.72
0.67
0.57
0.55
0.48
0.45
0.42
0.37
0.34
3.12
2.92
2.73
2.49
2.41
2.32
2.25
2.03
1.91
1.83
1.62
1.50
1.31
1.23
1.16
1.02
0.95
0.81
0.77
0.67
0.63
0.59
0.52
0.49
1. When ordering, please specify
testing
code:
ML590PND105KLZ
Testing: Z
= COTS
H
= Screening per Coilcraft CP-SA-10001
N
= Screening per Coilcraft CP-SA-10004
C
= Custom screening (please specify when ordering)
2. Inductance shown for each winding, measured at 100 kHz, 0.1 Vrms,
0 Adc on an Agilent/HP 4284A LCR meter or equivalent. When leads
are connected in parallel, inductance is the same value. When leads
are connected in series, inductance is four times the value.
3. DCR is for each winding. When leads are connected in parallel, DCR is
half the value. When leads are connected in series, DCR is twice the
value.
4. SRF measured using an Agilent/HP 4191A or equivalent. When leads
are connected in parallel, SRF is the same value.
5. DC current, at which the inductance drops the specified amount from its
value without current. It is the sum of the current flowing in both
windings.
6. Equal current when applied to each winding simultaneously that causes
a 40°C temperature rise from 25°C ambient. See temperature rise
calculation.
7. Maximum current when applied to one winding that causes a 40°C
temperature rise from 25°C ambient. See temperature rise calculation.
8. Electrical specifications at 25°C.
Refer to Doc 639 “Selecting Coupled Inductors for SEPIC Applications.”
Refer to Doc 362 “Soldering Surface Mount Components” before
soldering.
Temperature rise calculation based on specified
Irms
Winding power loss = (
I
L12
+
I
L22
) × DCR in Watts (W)
55.6°C
Temperature rise ( t) = Winding power loss ×
W
55.6°C
t = (
I
L12
+
I
L22
) × DCR ×
W
Example 1.
590PND153 (Equal current in each winding)
Winding power loss = (2.06
2
+ 2.06
2
) × 0.085 = 0.721 W
55.6°C
t = 0.721 W ×
= 40°C
W
Example 2.
590PND153 (
I
L1
= 2.4 A,
I
L2
= 1.3 A)
Winding power loss = (2.4
2
+ 1.3
2
) × 0.085 = 0.633 W
t = 0.633 W ×
55.6°C
= 35.2°C
W
®
Specifications subject to change without notice.
Please check our website for latest information. Document ML703-1
Revised 07/06/10
1102 Silver Lake Road
Cary IL 60013
© Coilcraft, Inc. 2010
Phone 800-981-0363
Fax 847-639-1508
E-mail cps@coilcraft.com
Web www.coilcraft-cps.com
1260 COUPLED INDUCTORS
ML590PND Series (1260)
Typical L vs Current
10000
Typical L vs Frequency
10000
1000
1000 µH
470 µH
1000
1000 µH
470 µH
Inductance (µH)
Inductance (µH)
100
100 µH
47 µH
100
100 µH
47 µH
10
10 µH
4.7 µH
10
10 µH
4.7 µH
1
0.1
1
10
100
1
0.01
0.1
1
10
Current (A)
Frequency (MHz)
Current Derating
120
110
100
90
80
70
60
50
40
30
20
10
0
-55 -40
25°C
Percent of rated Current
Isat
Irms
-20
0
20
40
60
80
100
120
140 160
®
Specifications subject to change without notice.
Please check our website for latest information. Document ML703-1
Revised 07/06/10
1102 Silver Lake Road
Cary IL 60013
© Coilcraft, Inc. 2010
Phone 800-981-0363
Fax 847-639-1508
E-mail cps@coilcraft.com
Web www.coilcraft-cps.com
