Description
•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
Packaging
•Supplied in tape and reel packaging, 850 per reel
DR1040 Series
Low Profile Power Inductors
PartNumber Rated OCL (1) Irms(2) Isat (3) DCR (Ω) DCR (Ω) K-factor
Inductance µH±30% Amperes Amperes mΩ@20°C mΩ@20°C (4)
(µH) (Typical) (Maximum)
DR1040-1R5-R 1.5 1.4 6.50 10.00 6.0 8.1 15.48
DR1040-2R5-R 2.5 2.4 6.10 7.80 7.0 9.0 12.04
DR1040-3R8-R 3.8 3.6 5.50 6.40 9.6 13.0 9.85
DR1040-5R2-R 5.2 5.2 5.40 5.50 14.0 17.0 8.33
DR1040-7R0-R 7.0 6.8 4.50 4.80 17.0 20.0 7.22
DR1040-8R2-R 8.2 8.1 3.98 4.60 24.0 29.0 6.37
DR1040-100-R 10 9.6 3.80 4.40 26.0 35.0 5.70
DR1040-150-R 15 14.9 3.10 3.60 37.0 50.0 4.71
DR1040-220-R 22 21.1 2.50 2.90 54.0 73.0 4.01
DR1040-330-R 33 32.6 2.20 2.45 69.0 93.0 3.28
DR1040-470-R 47 45.8 1.90 2.10 95.0 128 2.78
DR1040-680-R 68 65.3 1.42 1.65 152 183 2.30
DR1040-820-R 82 86.8 1.29 1.47 214 260 2.04
DR1040-101-R 100 101.4 1.25 1.35 225 304 1.90
DR1040-151-R 150 148.3 0.85 1.15 356 430 1.57
DR1040-221-R 220 216.2 0.70 0.92 530 640 1.27
DR1040-331-R 330 323.4 0.52 0.70 810 1090 1.03
(1) Open Circuit Inductance T
est Parameters: 100kHz, 0.25V
,0.0Adc.
(2) Irms: DC current for an approximate ∆Tof 30°C without core loss. Derating is
necessary for ACcurrents. 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)
(4) K-factor:Used to determine B p-p for core loss (see graph).
Bp-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) PartNumber 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
RoHS
2002/95/EC
DR1040 Series
Low Profile Power Inductors
Core Loss
0. 001
0. 01
0. 1
1
10
1 10 100 1000
Bp-p (mT)
Core Loss(W)
100kHz
200kHz
300kHz
500kHz1MHz
B1
wwlly R
XXX
A1
12.0
24.0
+/-0.3
1.5 dia
min
A
1.75
A
4.0
User direction of feed
Ao 16.0
2.0
A1=10.6 mm
Bo=11.0 mm
Ao=10.8 mm
1.5 dia
+0.1/-0.0
Bo
Ko
SECTION A-A
Ko=4.2 mm
B1=10.5 mm
Parts packaged on 13" Diameter reel,
850 parts per reel.
Packaging Information
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.
wwll y R
XXX
10.5 max
TOP VIEW
1 2 10.3 max
SIDE VIEW
4.0 max
BOTTOM VIEW
7.7
+/- 0.3
1.2 +/- 0.15
(2 Pcs)
1
3.0
+/- 0.1
2
RECOMMENDED PCB LAYOUT
3.2
2plcs 10. 5 Ref
1.6
2plcs
SCHEMATI C
2
1
Mechanical Diagrams
60.0%
% of OCL
120.0%
100.0%
80.0%
40.0%
20.0%
0.0%
0.0% 20.0% 40.0% 60.0% 80.0% 100.0% 120.0% 140.0% 160.0%
% of Isat
OCL vs. Isat
-40 Deg.C
+25 Deg.C
+85 Deg.C
Inductance Characteristics
DR1040 Series
Low Profile Power Inductors
Temperature Rise vs. Loss
0
20
40
60
80
100
120
0 0.2 0.4 0.6 0.8 1 1.2
Total Loss (W)
TemperatureRise(°C)
Visit us on the Web at www.cooperbussmann.com
1225 Broken Sound Pkwy. Suite F Boca Raton, FL 33487
T
el: +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.
PM-4147 3/07
© Cooper Electronic
Technologies 2007
