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DRQ Series
Dual Winding, Shielded
Inductors/Transformer
Description
RoHS
2002/95/EC
• 125°C maximum total temperature operation
• Dual winding inductors that can be used as either
a single inductor, or in coupled inductor/transformer
applications (1:1 turns ratio)
• Four sizes of shielded drum core inductors
• Windings can be connected in series or parallel, offering
a broad range of inductance and current ratings
• Peak current ratings from 0.13 Amps to 56 Amps
• RMS current ratings from 0.128 Amps to 17.9 Amps
• Inductance ratings from 0.33µH to 4.02mH
• Surface Mount
• 200 VAC Isolation between windings
• Ferrite core material
Applications
• As a transformer: SEPIC, flyback
• As an inductor: Buck, boost, coupled inductor
• DC/DC converters
• VRM inductor for CPU and DDR power supplies
• Input and output filter chokes
Environmental Data
• Storage temperature: -40°C to +125°C
• Operating temperature: -40°C to +125°C (Range is
application specific).
• Solder reflow temperature: 260°C max. for 10 seconds
max.
Part Number
DRQ73-R33-R
DRQ73-1R0-R
DRQ73-1R5-R
DRQ73-2R2-R
DRQ73-3R3-R
DRQ73-4R7-R
DRQ73-6R8-R
DRQ73-8R2-R
DRQ73-100-R
DRQ73-150-R
DRQ73-220-R
DRQ73-330-R
DRQ73-470-R
DRQ73-680-R
DRQ73-820-R
DRQ73-101-R
DRQ73-151-R
DRQ73-221-R
DRQ73-331-R
DRQ73-471-R
DRQ73-681-R
DRQ73-821-R
DRQ73-102-R
Rated
Inductance
(µH)
0.33
1.00
1.50
2.20
3.30
4.70
6.80
8.20
10.0
15.0
22.0
33.0
47.0
68.0
82.0
100
150
220
330
470
680
820
1000
OCL (1)
+/-20%
(µH)
0.306
0.992
1.482
2.070
3.540
4.422
6.480
8.930
10.30
15.01
22.65
34.41
48.62
68.91
80.37
101.4
150.9
223.3
325.5
465.8
676.5
821.7
995.0
I rms (2)
Amperes
6.19
5.25
4.64
4.11
3.31
3.09
2.55
2.19
2.08
1.83
1.62
1.31
1.08
0.89
0.86
0.73
0.58
0.52
0.42
0.35
0.29
0.27
0.26
Parallel Ratings
I sat (3)
DCR Ω (4)
Amperes
typ.
Peak
14.4
0.0074
7.97
0.0103
6.52
0.0132
5.52
0.0167
4.22
0.0259
0.0297
3.78
3.12
0.0435
2.66
0.0592
2.47
0.0656
2.05
0.0844
0.107
1.67
1.35
0.166
1.14
0.241
0.96
0.358
0.89
0.384
0.527
0.79
0.65
0.851
0.53
1.05
0.44
1.59
0.37
2.36
0.31
3.47
0.28
3.93
0.25
4.34
1) Open Circuit Inductance Test Parameters: 100kHz, 0.25 Vrms, 0.0 Adc
Parallel: (1,2 - 4,2) Series: (1 - 4) tie (2 - 3)
2) RMS current for an approximate ∆T of 40°C without core loss. It is
recommended that the temperature of the part not exceed 125°C.
3) Peak current for approximately 30% roll-off at 20°C
Packaging
• Supplied in tape and reel packaging, 1350 (DRQ73),
1100 (DRQ74), 600 (DRQ125), and 350 (DRQ127)
per reel
Volt (5)
µ-Sec
1.98
3.56
4.36
5.15
6.73
7.52
9.11
10.7
11.5
13.9
17.0
21.0
24.9
29.7
32.1
36.0
44.0
53.5
64.5
77.2
93.1
103
113
OCL (1)
+/-20%
(µH)
1.224
3.968
5.928
8.280
14.16
17.69
25.92
35.72
41.20
60.04
90.60
137.6
194.5
275.6
321.5
405.6
603.6
893.2
1302
1863
2706
3287
3980
I rms (2)
Amperes
3.10
2.63
2.32
2.06
1.66
1.55
1.28
1.10
1.04
0.916
0.811
0.653
0.542
0.444
0.430
0.367
0.289
0.260
0.211
0.173
0.143
0.134
0.128
Series Ratings
I sat (3)
DCR Ω (4)
Amperes
typ.
Peak
7.18
0.0296
3.99
0.0411
3.26
0.0527
2.76
0.0669
2.11
0.1035
1.89
0.1188
1.56
0.1742
1.33
0.2368
1.24
0.2623
1.03
0.339
0.83
0.429
0.68
0.665
0.57
0.965
0.48
1.43
0.44
1.54
0.39
2.11
0.32
3.41
0.27
4.20
0.22
6.36
0.18
9.44
0.15
13.88
0.14
15.72
0.13
17.36
Volt (5)
µ-Sec
3.96
7.12
8.72
10.3
13.5
15.0
18.2
21.4
23.0
27.8
34.0
42.0
49.8
59.4
64.2
72.0
88.0
107
129
154
186
206
226
4) DCR limits @ 20°C
5) Applied Volt-Time product (V-µS) across the inductor. This value represents the
applied V-µS at 100KHz necessary to generate a core loss equal to 10% of the
total losses for a 40°C temperature rise.
6) Turns Ratio (1-2):(3-4) 1:1
DRQ Series
Dual Winding, Shielded
Inductors/Transformer
Part Number
DRQ74-R33-R
DRQ74-1R0-R
DRQ74-1R5-R
DRQ74-2R2-R
DRQ74-3R3-R
DRQ74-4R7-R
DRQ74-6R8-R
DRQ74-8R2-R
DRQ74-100-R
DRQ74-150-R
DRQ74-220-R
DRQ74-330-R
DRQ74-470-R
DRQ74-680-R
DRQ74-820-R
DRQ74-101-R
DRQ74-151-R
DRQ74-221-R
DRQ74-331-R
DRQ74-471-R
DRQ74-681-R
DRQ74-821-R
DRQ74-102-R
DRQ125-R47-R
DRQ125-1R0-R
DRQ125-1R5-R
DRQ125-2R2-R
DRQ125-3R3-R
DRQ125-4R7-R
DRQ125-6R8-R
DRQ125-8R2-R
DRQ125-100-R
DRQ125-150-R
DRQ125-220-R
DRQ125-330-R
DRQ125-470-R
DRQ125-680-R
DRQ125-820-R
DRQ125-101-R
DRQ125-151-R
DRQ125-221-R
DRQ125-331-R
DRQ125-471-R
DRQ125-681-R
DRQ125-821-R
DRQ125-102-R
Rated
Inductance
(µH)
0.33
1.00
1.50
2.20
3.30
4.70
6.80
8.20
10.0
15.0
22.0
33.0
47.0
68.0
82.0
100
150
220
330
470
680
820
1000
0.47
1.00
1.50
2.20
3.30
4.70
6.80
8.20
10.0
15.0
22.0
33.0
47.0
68.0
82.0
100
150
220
330
470
680
820
1000
OCL (1)
+/-20%
(µH)
0.294
0.952
1.422
1.986
3.396
5.182
7.344
8.566
9.882
16.09
21.73
33.01
49.64
69.67
80.95
101.6
150.0
227.0
335.6
465.3
671.2
812.7
1009
0.456
0.894
1.478
2.208
3.084
5.274
6.588
8.048
9.654
15.35
22.36
33.74
47.47
67.91
86.89
102.7
151.1
216.8
332.6
473.1
679.8
828.0
1008
I rms (2)
Amperes
6.20
5.33
4.96
4.66
3.94
3.34
2.60
2.53
2.41
2.11
1.75
1.41
1.15
1.03
0.91
0.86
0.69
0.56
0.45
0.40
0.33
0.31
0.27
17.6
15.0
13.8
10.9
9.26
7.18
6.64
5.54
5.35
4.27
3.70
3.28
2.71
2.22
2.05
1.78
1.48
1.19
1.06
0.87
0.70
0.60
0.57
Parallel Ratings
I sat (3)
DCR Ω (4)
Amperes
typ.
Peak
18.4
0.0074
10.2
0.0100
8.35
0.0115
7.06
0.0130
5.40
0.0183
4.37
0.0254
3.67
0.0418
3.40
0.0441
3.17
0.0489
2.48
0.0637
2.13
0.0925
1.73
0.143
1.41
0.216
1.19
0.265
1.11
0.345
0.99
0.383
0.81
0.591
0.66
0.907
0.54
1.41
0.46
1.74
0.38
2.58
0.35
2.93
0.31
3.89
33.0
0.0018
23.6
0.0024
18.3
0.0029
15.0
0.0045
12.7
0.0063
9.71
0.0105
8.68
0.0123
7.86
0.0176
7.17
0.0189
5.69
0.0298
0.0396
4.71
3.84
0.0505
3.24
0.0740
2.70
0.101
2.39
0.128
0.170
2.20
1.81
0.248
1.51
0.384
0.482
1.22
1.02
0.718
0.85
1.10
0.77
1.49
0.70
1.69
1) Open Circuit Inductance Test Parameters: 100kHz, 0.25 Vrms, 0.0 Adc
Parallel: (1,2 - 4,2) Series: (1 - 4) tie (2 - 3)
2) RMS current for an approximate ∆T of 40°C without core loss. It is
recommended that the temperature of the part not exceed 125°C.
3) Peak current for approximately 30% roll-off at 20°C
Volt (5)
µ-Sec
1.71
3.08
3.76
4.45
5.81
7.18
8.55
9.23
9.92
12.7
14.7
18.1
22.2
26.3
28.4
31.8
38.6
47.5
57.8
68.1
81.7
89.9
100
3.17
4.43
5.70
6.97
8.23
10.8
12.0
13.3
14.6
18.4
22.2
27.2
32.3
38.6
43.7
47.5
57.6
69.0
85.5
102
122
135
149
OCL (1)
+/-20%
(µH)
1.176
3.808
5.688
7.944
13.58
20.73
29.38
34.26
39.53
64.36
86.92
132.0
198.6
278.7
323.8
406.4
600.0
908.0
1342
1861
2685
3251
4036
1.824
3.576
5.912
8.832
12.34
21.10
26.35
32.19
38.62
61.40
89.44
135.0
189.9
271.6
347.6
410.8
604.4
867.2
1330
1892
2719
3312
4032
I rms (2)
Amperes
3.10
2.66
2.48
2.33
1.97
1.67
1.30
1.27
1.20
1.05
0.874
0.702
0.573
0.517
0.453
0.430
0.346
0.279
0.224
0.202
0.166
0.156
0.135
8.80
7.51
6.89
5.46
4.63
3.59
3.32
2.77
2.67
2.13
1.84
1.64
1.35
1.11
1.03
0.892
0.739
0.594
0.530
0.434
0.350
0.301
0.283
Series Ratings
I sat (3)
DCR Ω (4)
Amperes
typ.
Peak
9.18
0.0295
5.10
0.0400
4.17
0.0461
3.53
0.0521
2.70
0.0732
2.19
0.102
1.84
0.167
1.70
0.177
1.58
0.196
1.24
0.255
1.07
0.371
0.87
0.574
0.71
0.865
0.60
1.06
0.55
1.38
0.49
1.53
0.41
2.37
0.33
3.63
0.27
5.66
0.23
6.97
0.19
10.3
0.17
11.7
0.16
15.6
16.5
0.0078
11.8
0.0096
9.15
0.0114
7.50
0.0182
6.35
0.0253
4.86
0.0420
4.34
0.0492
3.93
0.0705
3.59
0.0757
2.85
0.120
2.36
0.159
1.92
0.203
1.62
0.297
1.35
0.440
1.20
0.515
1.10
0.682
0.905
0.991
0.755
1.54
1.93
0.610
0.510
2.87
0.425
4.42
0.385
5.96
0.350
6.76
Volt (5)
µ-Sec
3.42
6.16
7.52
8.9
11.6
14.4
17.1
18.5
19.8
25.4
29.4
36.2
44.4
52.6
56.8
63.6
77.2
95
116
136
163
180
200
6.34
8.86
11.40
13.9
16.5
21.6
24.0
26.6
29.2
36.8
44.4
54.4
64.6
77.2
87.4
95.0
115.2
138
171
204
244
270
298
4) DCR limits @ 20°C
5) Applied Volt-Time product (V-µS) across the inductor. This value represents the
applied V-µS at 100KHz necessary to generate a core loss equal to 10% of the
total losses for a 40°C temperature rise.
6) Turns Ratio (1-2):(3-4) 1:1
DRQ Series
Dual Winding, Shielded
Inductors/Transformer
Part Number
DRQ127-R47-R
DRQ127-1R0-R
DRQ127-1R5-R
DRQ127-2R2-R
DRQ127-3R3-R
DRQ127-4R7-R
DRQ127-6R8-R
DRQ127-8R2-R
DRQ127-100-R
DRQ127-150-R
DRQ127-220-R
DRQ127-330-R
DRQ127-470-R
DRQ127-680-R
DRQ127-820-R
DRQ127-101-R
DRQ127-151-R
DRQ127-221-R
DRQ127-331-R
DRQ127-471-R
DRQ127-681-R
DRQ127-821-R
DRQ127-102-R
Rated
Inductance
(µH)
0.47
1.00
1.50
2.20
3.30
4.70
6.80
8.20
10.0
15.0
22.0
33.0
47.0
68.0
82.0
100
150
220
330
470
680
820
1000
OCL (1)
+/-20%
(µH)
0.419
0.821
1.357
2.027
2.831
4.841
7.387
8.861
10.47
14.09
22.93
33.92
47.05
66.48
79.75
99.31
144.9
221.5
323.6
467.1
676.7
818.1
1005
I rms (2)
Amperes
17.9
15.5
13.5
12.5
10.4
8.25
7.34
6.32
6.04
5.03
4.00
3.23
2.95
2.44
2.09
1.96
1.59
1.29
1.04
0.85
0.76
0.65
0.61
Parallel Ratings
I sat (3)
DCR Ω (4)
Amperes
typ.
Peak
56.0
0.00195
40.0
0.00261
31.1
0.00341
25.5
0.00373
21.5
0.00567
16.5
0.00917
13.3
0.0116
12.2
0.0157
11.2
0.0172
9.66
0.0247
7.57
0.0391
6.22
0.0600
5.28
0.0719
4.44
0.105
4.06
0.143
3.64
0.163
3.01
0.247
2.43
0.376
2.01
0.574
1.68
0.861
1.39
1.08
1.27
1.47
1.66
1.14
1) Open Circuit Inductance Test Parameters: 100kHz, 0.25 Vrms, 0.0 Adc
Parallel: (1,2 - 4,2) Series: (1 - 4) tie (2 - 3)
2) RMS current for an approximate ∆T of 40°C without core loss. It is
recommended that the temperature of the part not exceed 125°C.
3) Peak current for approximately 30% roll-off at 20°C
Volt (5)
µ-Sec
3.50
4.90
6.30
7.70
9.10
11.9
14.7
16.1
17.5
20.3
25.9
31.5
37.1
44.1
48.3
53.9
65.1
80.5
97.3
117
141
155
172
OCL (1)
+/-20%
(µH)
1.676
3.284
5.428
8.108
11.32
19.36
29.55
35.44
41.88
56.36
91.72
135.7
188.2
265.9
319.0
397.2
579.6
886.0
1294
1868
2707
3272
4020
I rms (2)
Amperes
8.94
7.74
6.77
6.23
5.23
4.13
3.67
3.16
3.02
2.51
2.00
1.61
1.47
1.22
1.04
0.980
0.796
0.645
0.522
0.427
0.380
0.325
0.307
Series Ratings
I sat (3)
DCR Ω (4)
Amperes
typ.
Peak
28
0.0078
20
0.0104
15.6
0.0137
12.7
0.0161
10.8
0.0229
8.24
0.0367
6.67
0.0465
6.09
0.0627
5.60
0.0686
4.83
0.0990
3.78
0.157
3.11
0.241
2.64
0.288
2.22
0.421
2.03
0.573
1.82
0.653
1.51
0.989
1.22
1.50
1.01
2.30
0.838
3.44
0.697
4.32
0.633
5.88
0.571
6.64
Volt (5)
µ-Sec
7.00
9.80
12.60
15.4
18.2
23.8
29.4
32.2
35.0
40.6
51.8
63.0
74.2
88.2
96.6
107.8
130.2
161
195
234
282
310
344
4) DCR limits @ 20°C
5) Applied Volt-Time product (V-µS) across the inductor. This value represents the
applied V-µS at 100KHz necessary to generate a core loss equal to 10% of the
total losses for a 40°C temperature rise.
6) Turns Ratio (1-2):(3-4) 1:1
DRQ Series
Dual Winding, Shielded
Inductors/Transformer
Mechanical Diagrams
DRQ73 Series
BOTTOM VIEW
FRONT VIEW
RECOMMENDED PCB LAYOUT
TOP VIEW
6.1
0.73
1.73
1.00
0.60
7.6
Max.
1.00
0.40
0.40
•
7.6
Max.
DRQ73
###
1.73
0.80
3.55 Max
7.9
7.9
Dual Inductor Mode
Series Mode
SCHEMATIC
Dual Inductor
1
Series Mode
1
2
L1
L2
3
Parallel Mode
2
L1
L2
2
L1
3
4
1
L2
3
4
4
DRQ74 Series
BOTTOM VIEW
FRONT VIEW
RECOMMENDED PCB LAYOUT
TOP VIEW
0.73
1.73
1.00
7.6
Max
0.60
1.00
0.40
0.40
•
DRQ74
###
7.6
Max
1.73
7.9
6.1
7.9
Dual Inductor Mode
4.45
Max
Series Mode
SCHEMATIC
Dual Inductor
1
2
L1
3
Dimensions in Millimeters.
Parallel Mode
Series Mode
1
L2
L1
4
3
2
1
4
3
2
L1
L2
L2
4
### = Inductance value per family chart
Dot indicates pin #1
DRQ Series
Dual Winding, Shielded
Inductors/Transformer
Mechanical Diagrams
DRQ125 Series
BOTTOM VIEW
FRONT VI EW
2.05
RECOMMENDED PCB LAYOUT
TOP VIEW
3.85
2.00 2
3
1
4
0.50
3.85
•
12.5
Max
12.5
Max
1
2
DRQ125
###
wwlly y R
1
4
2.50
3
4
2
3
2.50
1
4
2
3
0.50
10.0
13.80
13.80
Dual Inductor Mode
Series Mode
6.00 Max
SCHEMATIC
1
L1
2
1
4
3
L2
3
Parallel Mode
Series Mode
Dual Inductor
L1
2
1
4
3
2
L1
L2
L2
4
DRQ127 Series
BOTTOM VIEW
FRONT VIEW
TOP VIEW
RECOMMENDED PCB LAYOUT
2.05
3.85
2.00 2
3
1
4
12.5
Max
•
12.5
Max
1
2
DRQ127
###
wwll yy R
0.50
3.85
4
2.50
2.50
3
1
4
2
3
0.50
10.0
8.0
Max
13.80
13.80
Dual Inductor Mode
Series Mode
SCHEMATIC
Dual Inductor
1
L1
3
Dimensions in Millimeters.
Series Mode
2
1
L2
L1
4
3
Parallel Mode
2
2
1
L2
L1
4
3
L2
4
### = Inductance value per family chart
wwllyy = (date code) R = revision level
Dot indicates pin #1
DRQ Series
Dual Winding, Shielded
Inductors/Transformer
Packaging Information
DRQ73 Series
ACTUAL SIZE
DRQ73
Ao=7.90mm
Bo=7.90mm
Ko=3.80mm
Direction of Feed
➞
Parts packaged on 13" Diameter reel,
1,350 parts per reel.
DRQ74 Series
Ø1.50 +0.1/-0.0
2.00 ±0.1
0.1
Ø1.50 Min.
4.00
A
1.75±0.10
1
2
7.50±0.1
DRQ74
###
Bo
ACTUAL SIZE
DRQ74
4
3
A
Ko
Ao=7.90mm
Bo=7.90mm
Ko=4.70mm
16.00
±0.3
0.3
Direction of Feed
12.00
Ao
➞
Parts packaged on 13" Diameter reel,
1,100 parts per reel.
SECTION A-A
DRQ125 Series
4.0
1.5 dia
+0.1/-0.0
2.0
1.5 dia
min
A
1.7
1
2
11.5
•
ACTUAL SIZE
DRQ125
4
3
Ao=13.00mm
Bo=13.00mm
Ko=6.30mm
24.0
+/-0.3
DRQ125
###
wwllyy
B0
K0
A0
Direction of Feed
A
16.00
SECTION A-A
➞
Parts packaged on 13" Diameter reel,
600 parts per reel.
DRQ127 Series
4.0
1.5 dia
+0.1/-0.0
2.0
1.5 dia
min
A
1.7
R0.3 max.
1
2
11.5
ACTUAL SIZE
DRQ127
4
3
Ao=13.00mm
Bo=13.00mm
Ko=8.30mm
24.0
+/-0.3
DRQ127
###
wwllyy
B0
Direction of Feed
K0
A0
SECTION A-A
Dimensions are in millimeters.
20.00
A
R0.5 TYP.
➞
Parts packaged on 13" Diameter reel,
350 parts per reel.
DRQ Series
Dual Winding, Shielded
Inductors/Transformer
Inductance Characteristics
OCL vs Isat DRQ73
OCL vs Isat DRQ74
100
100
90
80
80
OCL (%)
OCL (%)
70
60
50
40
60
40
30
20
20
10
0
0
20
40
60
80
100
120
140
0
160
0
20
40
60
80
% of Isat
120
140
160
180
OCL vs Isat DRQ127
OCL vs Isat DRQ125
100
100
90
90
80
80
70
70
OCL (%)
OCL (%)
100
% of Isat
60
50
60
50
40
40
30
30
20
20
10
10
0
0
10
20
30
40
50
60
70
80
90
100
110
120
130
140
0
150
10
0
20
30
% of Isat
Core Loss
50
60
70
80
% Idc sat
% of Applied
olt-µS
V econd
z
KH
25
z
KH
50
Hz
10
0K
Hz
20
0K
30
0
KH
z
Irms DERATING WITH CORE LOSS
% of Losses from Irms (maximum)
40
90
100
110
120
130
140
150
DRQ Series
Dual Winding, Shielded
Inductors/Transformer
PM-4315 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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