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LD Series
Metalized Drum Core
Power Inductor
Description
RoHS
2002/95/EC
• Metalized drum core design utilizes board space
• Current Range from 4.46 to 0.52 Amps
• Inductance range from 1.0 uH to 470uH
• Ferrite core material
Applications
• Buck or Boost inductor
• Noise filtering and output filter chokes
• Computers
• Power Supplies
• Test Equipment Instrumentation
Environmental Data
• Storage temperature: -25°C to +85°C
• Operating ambient temperature: -20°C to +80°C (Range
is application specific). Temperature rise is
approximately 40°C at rated rms current.
• Solder reflow temperature: 260°C max. for 10 seconds
max.
Part
Number
LD1-1R0-R
LD1-1R4-R
LD1-1R8-R
LD1-2R2-R
LD1-2R7-R
LD1-3R3-R
LD1-3R9-R
LD1-4R7-R
LD1-5R6-R
LD1-6R8-R
LD1-8R2-R
LD1-100-R
LD1-120-R
LD1-150-R
LD1-180-R
LD1-220-R
LD1-270-R
LD1-330-R
LD1-390-R
LD1-470-R
LD1-560-R
LD1-680-R
Rated
Inductance
(µH)
1.0
1.4
1.8
2.2
2.7
3.3
3.9
4.7
5.6
6.8
8.2
10
12
15
18
22
27
33
39
47
56
68
Packaging
• Supplied in tape and reel packaging, LD1 (2,000), LD2
(1,000) parts per reel
OCL (1)
Nominal
Irms (2)
Amperes
Isat (3)
Amperes
1.00
1.40
1.80
2.20
2.70
3.30
3.90
4.70
5.60
6.80
8.20
10.0
12.0
15.0
18.0
22.0
27.0
33.0
39.0
47.0
56.0
68.0
2.66
2.47
2.35
2.22
2.11
2.00
1.75
1.57
1.51
1.41
1.32
1.13
1.05
0.99
0.83
0.78
0.67
0.66
0.63
0.52
0.50
0.46
4.46
3.41
3.05
2.76
2.52
2.32
2.14
2.00
1.75
1.56
1.41
1.28
1.18
1.05
0.98
0.89
0.87
0.75
0.68
0.61
0.57
0.52
Notes:
1) Open Circuit Inductance Test Parameters: 100kHz, 0.25Vrms, 0.0Adc +/-20%
except for LD1-330 to LD1-680 and LD2-470 to LD2-471 which is +/-10%
2) RMS current for for an approximate T of 40°C. It is recommended that the
temperature of the part not exceed 125°C
3) Peak current for an approximate 10% rolloff at 20°C
4) DCR limits @ 20°C
DCR (4)
(Ω)
(Max.)
0.0330
0.0380
0.0420
0.0470
0.0520
0.0580
0.0760
0.0940
0.1010
0.1170
0.1320
0.1820
0.2100
0.2350
0.3380
0.3780
0.5220
0.5400
0.5870
0.8440
0.9370
1.12
LD Series
Metalized Drum Core
Power Inductor
Part
Number
Rated
Inductance
(µH)
10
12
15
18
22
27
33
39
47
56
68
82
100
120
150
180
220
270
330
390
470
LD2-100-R
LD2-120-R
LD2-150-R
LD2-180-R
LD2-220-R
LD2-270-R
LD2-330-R
LD2-390-R
LD2-470-R
LD2-560-R
LD2-680-R
LD2-820-R
LD2-101-R
LD2-121-R
LD2-151-R
LD2-181-R
LD2-221-R
LD2-271-R
LD2-331-R
LD2-391-R
LD2-471-R
OCL (1)
Nominal
Irms (2)
Amperes
Isat (3)
Amperes
10.0
12.0
15.0
18.0
22.0
27.0
33.0
39.0
47.0
56.0
68.0
82
100
120
150
180
220
270
330
390
470
3.83
3.57
3.38
3.19
3.13
2.81
2.70
2.42
2.25
1.96
1.88
1.63
1.53
1.43
1.23
1.15
1.00
0.94
0.83
0.78
0.74
3.45
3.20
2.85
2.60
2.45
2.10
2.01
1.85
1.64
1.50
1.35
1.28
1.15
1.09
0.95
0.87
0.79
0.73
0.64
0.58
0.55
Notes:
1) Open Circuit Inductance Test Parameters: 100kHz, 0.25Vrms, 0.0Adc +/-20%
except for LD1-330 to LD1-680 and LD2-470 to LD2-471 which is +/-10%
2) RMS current for for an approximate T of 40°C. It is recommended that the
temperature of the part not exceed 125°C
DCR (4)
(Ω)
(Max.)
0.0700
0.0800
0.0900
0.1000
0.1100
0.1200
0.1300
0.1600
0.1800
0.2400
0.2800
0.3700
0.4300
0.4700
0.6400
0.7100
0.9600
1.11
1.26
1.77
1.96
3) Peak current for an approximate 10% rolloff at 20°C
4) DCR limits @ 20°C
Mechanical Diagrams
RECOMMENDED PCB LAYOUT
TOP VIEW
A
BOTTOM VIEW
FRONT VIEW
SCHEMATIC
C
xxx
B
H
1
I
Marking
G
I
2
Component Side
Marking:
LD1: xxx=inductance value
per family chart
LD2: "C" logo
xxx=inductance value
Dimension
LD1
LD2
A
+/-0.3
4.5
7.8
B
+/-0.3
C
+/-0.3
G
ref
H
ref
I
ref
4.0
7.0
3.2
5.0
1.5
2.0
4.5
7.5
1.75
3.0
Dimensions in millimeters.
LD Series
Metalized Drum Core
Power Inductor
Packaging Information
8.0
LD1 Series
ACTUAL SIZE
LD1
xxx
xxx
xxx
xxx
12.0
Parts packaged on 13" Diameter reel,
2,000 parts per reel.
User Direction Feed
LD2 Series
12.0
ACTUAL SIZE
LD2
xxx
xxx
xxx
xxx
16.0
Parts packaged on 13" Diameter reel,
1,000 parts per reel.
User Direction Feed
Inductance Characteristics
OCL vs Isat
LD2
100
100
90
90
80
80
70
70
OCL (%)
OCL (%)
OCL vs Isat
LD1
60
50
40
60
50
40
30
30
20
20
10
10
0
0
0
10
20
30
40
50
60
70
80
90
100
110
120
0
10
20
30
40
% of Isat
PM-4317 3/07
© Cooper Electronic
Technologies 2007
50
60
70
80
90
100
110
120
% of Isat
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1225 Broken Sound Pkwy. Suite F Boca Raton, FL 33487
Tel: +1-561-998-4100 Toll Free: +1-888-414-2645 Fax: +1-561-241-6640
This bulletin is intended to present product design solutions and technical information that will help the end user with design applications. Cooper Electronic
Technologies reserves the right, without notice, to change design or construction of any products and to discontinue or limit distribution of any products. Cooper
Electronic Technologies also reserves the right to change or update, without notice, any technical information contained in this bulletin. Once a product has been
selected, it should be tested by the user in all possible applications.
Life Support Policy: Cooper Electronic Technologies does not authorize the use of any of its products for use in life support devices or systems without the
express written approval of an officer of the Company. Life support systems are devices which support or sustain life, and whose failure to perform, when
properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in significant injury to the user.
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