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DR1040 Series
Low Profile Power Inductors
Description
RoHS
2002/95/EC
• 125°C maximum total temperature operation
• Low profile surface mount inductor
• 10.3mm x 10.5mm x 4.0mm shielded drum core
• Ferrite core material
• Inductance range from 1.5µH to 330µH
• Current range from 10.0 Amps to 0.52 Amps
• Frequency range up to 1MHz
Applications
• Notebook power, Portable devices
• Wireless modems, ADSL line cards
• Point of load power supplies
• Battery chargers, Video Cards
• MP3 player, PDA’s, DVD players
• LED driver for notebook computer
• Navigation system, LCD backlighting
• Buck, Boost, or Forward inductor
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
DR1040-1R5-R
DR1040-2R5-R
DR1040-3R8-R
DR1040-5R2-R
DR1040-7R0-R
DR1040-8R2-R
DR1040-100-R
DR1040-150-R
DR1040-220-R
DR1040-330-R
DR1040-470-R
DR1040-680-R
DR1040-820-R
DR1040-101-R
DR1040-151-R
DR1040-221-R
DR1040-331-R
Rated
Inductance
(µH)
1.5
2.5
3.8
5.2
7.0
8.2
10
15
22
33
47
68
82
100
150
220
330
Packaging
• Supplied in tape and reel packaging, 850 per reel
OCL (1)
µH±30%
Irms(2)
Amperes
Isat (3)
Amperes
1.4
2.4
3.6
5.2
6.8
8.1
9.6
14.9
21.1
32.6
45.8
65.3
86.8
101.4
148.3
216.2
323.4
6.50
6.10
5.50
5.40
4.50
3.98
3.80
3.10
2.50
2.20
1.90
1.42
1.29
1.25
0.85
0.70
0.52
10.00
7.80
6.40
5.50
4.80
4.60
4.40
3.60
2.90
2.45
2.10
1.65
1.47
1.35
1.15
0.92
0.70
(1) Open Circuit Inductance Test Parameters: 100kHz, 0.25V, 0.0Adc.
(2) Irms: DC current for an approximate ∆T of 30°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 35% rolloff (@25°C)
DCR (Ω)
mΩ @20°C
(Typical)
6.0
7.0
9.6
14.0
17.0
24.0
26.0
37.0
54.0
69.0
95.0
152
214
225
356
530
810
DCR (Ω)
mΩ @20°C
(Maximum)
8.1
9.0
13.0
17.0
20.0
29.0
35.0
50.0
73.0
93.0
128
183
260
304
430
640
1090
K-factor
(4)
15.48
12.04
9.85
8.33
7.22
6.37
5.70
4.71
4.01
3.28
2.78
2.30
2.04
1.90
1.57
1.27
1.03
(4) K-factor: Used to determine B p-p for core loss (see graph).
B p-p = K*L*∆I, B p-p(mT), K: (K factor from table), L: (Inductance in µH),
∆I (Peak to peak ripple current in Amps).
(5) Part Number Definition: DR1040-xxx-R
DR1040 = 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
DR1040 Series
Low Profile Power Inductors
Mechanical Diagrams
TOP VIEW
SIDE VIEW
RECOMMENDED PCB LAYOUT
BOTTOM VIEW
10.5 max
3.0
+/- 0.1
4.0 max
1
XX X
wwll y R
2
1
10.3 max
1.6
2 plcs
2
3.2
2 plcs
1.2 +/- 0.15
(2 Pcs)
SCHEMATI C
1
2
10.5 Ref
7.7
+/- 0.3
Dimensions are in millimeters.
xxx = Inductance value in uH. R = decimal point. If no R is present third character = # of zeros. wwllyy = Date code, R = Revision level.
Packaging Information
1.5 dia
+0.1/-0.0
1.5 dia
min
4.0
2.0
A
1.75
12.0
Bo
B1
Ko
24.0
+/-0.3
XXX
wwlly R
A1
16.0
Ao
SECTION A-A
A
Ao=10.8 mm
Bo=11.0 mm
User direction of feed
A1=10.6 mm
B1=10.5 mm
Parts packaged on 13" Diameter reel,
850 parts per reel.
Ko=4.2 mm
Core Loss
1MHz 500kHz
300kHz
200kHz
10
100kHz
Core Loss (W)
1
0. 1
0. 01
0. 001
1
10
100
Bp-p (mT)
1000
DR1040 Series
Low Profile Power Inductors
Temperature Rise vs. Loss
Temperature Rise(°C)
120
100
80
60
40
20
0
0
0.2
0.4
0.6
0.8
1
1.2
Total Loss (W)
Inductance Characteristics
OCL vs. Isat
120.0%
100.0%
% of OCL
80.0%
60.0%
40.0%
-40 Deg.C
+25 Deg.C
+85 Deg.C
20.0%
0.0%
0.0%
20.0%
40.0%
60.0%
80.0%
100.0%
120.0%
140.0%
160.0%
% of Isat
PM-4147 3/07
© Cooper Electronic
Technologies 2007
Visit us on the Web at www.cooperbussmann.com
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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