Description
•125°C maximum total temperature operation
• Low profile surface mount inductor
•10.3mm x 10.5mm x 5.0mm shielded drum core
•Ferrite core material
•Inductance range from 0.7µH to 1000µH
•Current range from 13.5 Amps to 0.43 Amps
•Frequency range up to 1MHz
Applications
•Computer, DVD players, and portable power devices
•Notebook power, LCD panels
•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
Packaging
•Supplied in tape and reel packaging, 500 per reel
DR1050 Series
Low Profile Power Inductors
Part Number 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)
DR1050-R80-R 0.8 0.70 9.70 13.50 3.2 4.0 20.47
DR1050-1R5-R 1.5 1.37 8.60 10.50 4.0 5.0 14.62
DR1050-2R2-R 2.2 2.27 7.52 9.25 5.6 6.8 11.37
DR1050-3R3-R 3.3 3.21 6.50 8.20 8.0 10.0 9.30
DR1050-4R7-R 4.7 4.43 6.13 6.70 9.5 11.9 7.87
DR1050-6R8-R 6.8 6.30 5.45 5.80 13.0 16.5 6.82
DR1050-8R2-R 8.2 8.09 5.24 5.00 15.1 19.0 6.02
DR1050-100-R 10 10.1 4.80 4.58 18.0 22.5 5.39
DR1050-120-R 12 11.6 3.94 4.10 24.3 30.4 4.87
DR1050-150-R 15 14.8 3.80 3.70 26.0 32.5 4.45
DR1050-180-R 18 17.5 3.39 3.30 32.8 41.0 4.09
DR1050-220-R 22 23.5 3.12 3.00 38.7 48.4 3.53
DR1050-270-R 27 26.9 2.82 2.80 42.6 53.3 3.30
DR1050-330-R 33 34.3 2.56 2.50 57.5 71.9 2.92
DR1050-390-R 39 38.3 2.35 2.35 60.7 75.9 2.77
DR1050-470-R 47 47.1 2.06 2.10 89.0 111 2.50
DR1050-560-R 56 56.7 1.96 1.94 98.0 123 2.27
DR1050-680-R 68 67.2 1.84 1.70 111 139 2.09
DR1050-820-R 82 84.4 1.60 1.58 147 184 1.86
DR1050-101-R 100 97.5 1.52 1.45 164 205 1.73
DR1050-121-R 120 118.3 1.30 1.30 223 279 1.57
DR1050-151-R 150 149.2 1.26 1.15 238 298 1.40
DR1050-181-R 180 183.7 1.18 1.08 273 341 1.26
DR1050-221-R 220 221.8 1.00 0.98 377 472 1.15
DR1050-271-R 270 263.5 0.96 0.90 410 513 1.06
DR1050-331-R 330 320.6 0.83 0.80 554 693 0.96
DR1050-391-R 390 396.5 0.76 0.72 648 810 0.86
DR1050-471-R 470 480.5 0.64 0.62 855 1069 0.78
DR1050-561-R 560 572.6 0.62 0.60 970 1213 0.72
DR1050-681-R 680 707.9 0.56 0.55 1095 1369 0.64
DR1050-821-R 820 818.7 0.54 0.50 1185 1481 0.60
DR1050-102-R 1000 1000.2 0.43 0.48 1528 1950 0.54
(1) Open Circuit Inductance Test Parameters: 100kHz, 0.1V, 0.0Adc.
(2) Irms: DC current for an approximate ∆Tof 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 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) Part Number Definition: DR1050-xxx-R
DR1050 = 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
DR1050 Series
Low Profile Power Inductors
Core Loss
100kHz
200kHz
300kHz
500kHz
0. 0001
0. 001
0. 01
0. 1
1
10
1101001000
Core Loss(W)
Bp-p (mT)
z
z
z
z
1MH z
2.0
Ko=5.3 mm
B1=10.7 mm
A1=10.5 mm
Bo=11.0 mm
Ao=10.8 mm
1.5 dia
+0.1/-0.0
Bo
Ko
SECTION A-A
B1
wwlly R
XX X
A1
12.0
24.0
+/-0.3
1.5 dia
min
A
1.75
A
4.0
User direction of feed
Ao 16.0
Parts packaged on 13" Diameter reel,
500 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.
TOP VIEW FRONT VIEW
BOTTOM VIEW
LEFT VIEW
10.3 max.
10.5 max.
5.0 max.
3.0
7.7
XXX
wwlly R
1
2
RECOMMENDED PCB LAYOUT SCHEMATI C
1
2
3.3
7.3
1.6
1.2
Mechanical Diagrams
OCL vs. ISAT
0.0%
20.0%
40.0%
60.0%
80.0%
100.0%
120.0%
0% 20% 40% 60% 80% 100% 120% 140%
%of ISAT
%of OCL
-40 Deg. C
+25 Deg. C
+85 Deg. C
Inductance Characteristics
DR1050 Series
Low Profile Power Inductors
Temperature Rise vs. Loss
Temperature Rise vs. Total Loss
0.00
20.00
40.00
60.00
80.00
100.00
120.00
140.00
160.00
0.00 0.20 0.40 0.60 0.80 1.00 1.20
Total Loss (W)
Temperature Rise (°C)
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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-4139 3/07
© Cooper Electronic
Technologies 2007
