DR124 Series
Low Profile Power Inductors
Description
• 125°C maximum total temperature operation
• Low profile surface mount inductor
• 12.5mm x 12.5mm x 4.5mm shielded drum core
• Ferrite core material
• Inductance range from 0.47µH to 1000µH
• Current range from 24.4 Amps to 0.44 Amps
• Frequency range up to 1MHz
Applications
• Notebook power, LCD panels
• Computer, DVD players, and portable power devices
• DC-DC converters
• Buck, boost, forward, and resonant converters
• Noise filtering and filter chokes
Environmental Data
• Storage temperature range: -40°C to +125°C
• Operating temperature range: -40°C to +125°C
(range is application specific)
• Solder reflow temperature: +260°C max. for 10 seconds
maximum
Part Number
Rated
Inductance
(µH)
0.47
1.0
1.5
2.2
3.9
4.7
6.8
8.2
10
12
15
18
22
27
33
39
47
56
68
82
100
120
150
180
220
270
330
470
680
820
1000
OCL (1)
µH±20%
0.42
0.83
1.37
2.04
3.80
4.88
6.10
7.45
8.94
11.5
14.2
16.2
20.7
25.7
31.2
37.3
44.0
54.9
67.1
80.5
95.1
111
146
179
216
256
327
460
669
825
998
Irms(2)
Amperes
16.0
13.9
11.1
9.1
7.0
6.5
5.6
5.2
4.5
4.1
3.6
3.4
3.2
2.8
2.6
2.3
2.2
2.0
1.8
1.7
1.5
1.3
1.3
1.1
1.0
0.88
0.83
0.68
0.56
0.53
0.44
Packaging
• Supplied in tape and reel packaging, 750 per reel
Isat (3)
Amperes
24.40
18.00
14.00
11.45
8.40
7.65
6.47
6.22
5.80
4.96
4.62
4.32
3.83
3.44
3.12
2.85
2.63
2.35
2.13
1.94
1.79
1.65
1.44
1.30
1.15
1.09
0.92
0.74
0.65
0.62
0.53
DR124-R47-R
DR124-1R0-R
DR124-1R5-R
DR124-2R2-R
DR124-3R9-R
DR124-4R7-R
DR124-6R8-R
DR124-8R2-R
DR124-100-R
DR124-120-R
DR124-150-R
DR124-180-R
DR124-220-R
DR124-270-R
DR124-330-R
DR124-390-R
DR124-470-R
DR124-560-R
DR124-680-R
DR124-820-R
DR124-101-R
DR124-121-R
DR124-151-R
DR124-181-R
DR124-221-R
DR124-271-R
DR124-331-R
DR124-471-R
DR124-681-R
DR124-821-R
DR124-102-R
DCR
Ω
mΩ @20°C
(Typical)
2.2
3.00
4.75
5.92
12.50
13.50
18.06
21.67
23.33
31.67
37.30
46.97
53.99
66.67
80.83
110.00
124.66
144.32
183.33
212.72
256.67
311.18
371.02
501.66
558.00
725.00
825.00
1242.50
1845.83
2109.17
2898.00
DCR
Ω
mΩ @20°C
(Maximum)
2.7
3.6
5.7
7.1
15.0
16.2
21.7
26.0
28.0
38.0
44.8
56.4
64.8
80.0
97.0
132.0
149.6
173.2
220.0
255.3
308.0
373.4
445.2
602.0
669.6
870.0
990.0
1491.0
2215.0
2351.0
3477.00
K-factor
(4)
17.51
12.50
9.73
7.96
5.84
5.15
4.61
4.17
3.81
3.50
3.02
2.82
2.50
2.24
2.04
1.86
1.72
1.54
1.39
1.27
1.17
1.08
0.94
0.87
0.77
0.71
0.63
0.53
0.45
0.40
0.37
(1) Open Circuit Inductance Test Parameters: 100kHz, 0.25V, 0.0Adc.
(2) Irms: DC current for an approximate ³T of 40°C without core loss. Derating is
necessary for AC currents. PCB layout, trace thickness and width, air-flow, and
proximity of other heat generating components will affect the temperature rise. It
is recommended that the temperature of the part not exceed 125°C under worst
case operating conditions verified in the end application.
(3) Isat Amperes peak for approximately 25% rolloff (@25°C)
(4) K-factor: Used to determine B p-p for core loss (see graph).
B p-p = K*L*³I, B p-p(mT), K: (K factor from table), L: (Inductance in µH),
³I (Peak to peak ripple current in Amps).
(5) Part Number Definition: DR124-xxx-R
DR124 = Product code and size; -xxx = Inductance value in uH;
R = decimal point; If no R is present, third character = # of zeros.
-R suffix = RoHS compliant
DR124 Series
Low Profile Power Inductors
Temperature Rise vs. Loss
120
100
Temperature Rise (ºC)
80
60
40
20
0
0
0.4
0.8
1.2
1.6
2
Total Pow er Loss (W)
Inductance Characteristics
120.0%
100.0%
80.0%
% OCL
OCL Vs. Isat
60.0%
40.0%
20.0%
0.0%
0.0%
+85 Deg. C
+25 Deg. C
- 40
Deg. C
20.0%
40.0%
60.0%
% Isat
80.0%
100.0%
120.0%
PM-4141 1111
© Cooper Electronic
Technologies 2007
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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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