Surface Mount
Coupled Inductors
MODELS HM78D-1210XXXMLF HM78D-1210XXXMLF
·
·
·
·
·
·
Operating Temperature Range -40°C to +125°C
Ambient Temperature, Maximum +85°C
Operating Temperature Range -40°C to +125°C
Temperature Rise, Maximum 40°C
Ideal for SEPIC applications, high inductance, high efficiency
and excellent current handling in rugged, low cost part
Use as DC-DC converter and in applications like hand
phones, CD/DVD player, digital camera, GPS system.
Also used as two single inductors connected series or
parallel or as 1:1 transformer
RoHS Compliant
Electrical Schematic
Coupled inductor,
transformer and
SEPIC modes
Autotransformer
and series modes
Parallel mode
Specifications @ 25°C
Leads connected in parallel
Part Number
HM78D-12104R7MLF
HM78D-12106R8MLF
HM78D-12108R2MLF
HM78D-1210100MLF
HM78D-1210220MLF
HM78D-1210330MLF
HM78D-1210470MLF
HM78D-1210560MLF
HM78D-1210680MLF
HM78D-1210101MLF
HM78D-1210121MLF
HM78D-1210331MLF
HM78D-1210471MLF
Leads connected in series
Isat
(A)
18.00
14.20
12.85
11.75
8.20
6.60
5.50
4.90
4.45
3.70
3.40
2.10
1.80
L (μH)
4.70±20%
6.80±20%
8.20±20%
10.00±20%
22.00±20%
33.00±20%
47.00±20%
56.00±20%
68.00±20%
100.00±20%
120.00±20%
330.00±20%
470.00±20%
DCR
Max (Ω)
0.014
0.017
0.018
0.020
0.040
0.050
0.065
0.081
0.098
0.128
0.170
0.440
0.570
Irated
(A)
10.60
10.40
9.50
8.60
5.40
4.50
3.70
3.28
2.96
2.54
2.38
1.32
1.22
Irms
(A)
3.250
3.100
2.250
3.200
2.700
2.000
1.900
0.850
0.800
0.700
0.630
0.410
0.300
L (μH)
18.80±25%
27.20±25%
32.80±25%
41.12±25%
88.00±25%
132.00±25%
188.00±25%
224.00±25%
272.00±25%
400.00±25%
480.00±25%
1320.00±25%
1880.00±25%
DCR
Max (Ω)
0.056
0.068
0.072
0.080
0.160
0.200
0.260
0.324
0.392
0.512
0.680
1.760
2.280
Irated
(A)
5.30
5.20
4.75
4.30
2.70
2.25
1.85
1.64
1.48
1.27
1.19
0.66
0.61
Isat
(A)
9.00
7.10
6.45
5.85
4.10
3.30
2.75
2.45
2.20
1.85
1.70
1.05
0.90
Irms
(A)
1.625
1.550
1.125
1.600
1.350
1.000
0.950
0.425
0.400
0.350
0.315
0.205
0.150
Notes : (1) Inductance is measured at 100kHz, 0.1Vrms, 0Adc.
(2) When leads connected in parallel, DCR is half the value. When lead connected in series, DCR is twice the value
(3) Isat current is the saturation current at which inductance rolls off approximately 30% from its initial (zero DC) value.
(4) Irms equals DC current, that causes component to increase by 40°C from 25°C ambient.
(5) Irated current is the rated current at which inductance rolls off approximately 10% from its initial (zero DC) value.
Mechanical Outline (mm)
Recommended PCB Patern
General Note
TT electronics reserves the right to make changes in product specification without notice or liability.
All information is subject to TT electronics’ own data and is considered accurate at time of going to print.
www.bitechnologies.com
© TT electronics plc
Rev : 1
Last Updated : 19 Aug 2013
05.12
Surface Mount Coupled Inductors
MODELS HM78D-1210XXXMLF
Packaging
1) Tape and reel packaging.
2) 300pcs per 13” reel.
Ordering Information
HM78D-1210 XXX M LF TR
Model Series
Inductance Code:
First 2 digits are significant. Last digit denotes
the number of trailing zeros. For values below 10uH, “R”
denotes the decimal point.
Tape & Reel Packing
Lead-Free
Inductance Code:
First 2 digits are significant. Last digit denotes
the number of trailing zeros. For values below
10μH, “R” denotes the decimal point.
General Note
TT electronics reserves the right to make changes in product specification without notice or liability.
All information is subject to TT electronics’ own data and is considered accurate at time of going to print.
www.bitechnologies.com
© TT electronics plc
05.12
Shielded Surface
Mount Coupled Inductors
MODEL HM78D
·
·
·
·
·
Operating Temperature Range -40°C to +125°C
Operating Temperature Range -40°C to +125°C
Ambient Temperature, Maximum +85°C
Temperature Rise, Maximum 40°C
Operating Frequency Up to 3MHz
RoHS Compliant
Electrical Schematic
Coupled Inductors, transformer and SEPIC mode
Autotransformer and series mode
Parallel Mode
Specifications @ 25°C
Parallel Connection
Part Number
HM78D-1284R7MLF
HM78D-1285R6MLF
HM78D-1286R8MLF
HM78D-1288R2MLF
HM78D-128100MLF
HM78D-128120MLF
HM78D-128150MLF
HM78D-128180MLF
HM78D-128220MLF
HM78D-128270MLF
HM78D-128330MLF
HM78D-128390MLF
HM78D-128470MLF
HM78D-128560MLF
HM78D-128680MLF
HM78D-128820MLF
HM78D-128101MLF
HM78D-128121KLF
HM78D-128151KLF
HM78D-128181KLF
HM78D-128221KLF
HM78D-128271KLF
HM78D-128331KLF
HM78D-128391KLF
HM78D-128471KLF
HM78D-128561KLF
HM78D-128681KLF
HM78D-128821KLF
HM78D-128102KLF
HM78D-755R33MLF
HM78D-7551R0MLF
HM78D-7551R5MLF
HM78D-7552R2MLF
HM78D-7553R3MLF
HM78D-7554R7MLF
Series Connection
l
sat (3)
(A)
14.90
13.40
13.10
10.80
10.50
9.60
9.10
8.00
6.80
6.50
5.60
5.50
5.20
4.50
4.10
3.80
3.40
3.20
2.80
2.50
2.30
2.10
1.90
1.70
1.60
1.50
1.30
1.20
1.10
18.4
10.20
8.35
7.06
5.40
4.37
7.40
7.20
6.90
6.60
6.20
6.00
5.80
5.50
5.20
4.70
4.20
3.60
3.00
2.80
2.60
2.30
2.00
1.90
1.80
1.70
1.60
1.50
1.30
1.10
0.87
0.83
0.76
0.69
0.60
0 6.20
5.33
4.96
4.66
3.94
3.34
L
(1)
(μH)
4.7 ± 20%
5.6 ± 20%
6.8 ± 20%
8.2 ± 20%
10 ± 20%
12 ± 20%
15 ± 20%
18 ± 20%
22 ± 20%
27 ± 20%
33 ± 20%
39 ± 20%
47 ± 20%
56 ± 20%
68 ± 20%
82 ± 20%
100 ± 20%
120 ± 10%
150 ± 10%
180 ± 10%
220 ± 10%
270 ± 10%
330 ± 10%
390 ± 10%
470 ± 10%
560 ± 10%
680 ± 10%
820 ± 10%
1000 ± 10%
0.33 ± 20%
1.0 ± 20%
1.5 ± 20%
2.2 ± 20%
3.3 ± 20%
4.7 ± 20%
DCR Typ.
(2)
(Ω)
0.019
0.023
0.024
0.025
0.029
0.031
0.036
0.040
0.048
0.060
0.075
0.080
0.090
0.095
0.105
0.140
0.150
0.205
0.230
0.255
0.345
0.450
0.510
0.560
0.765
0.845
1.145
1.275
1.415
0.0074
0.0100
0.0115
0.0130
0.0183
0.0254
l
sat (4)
(A)
L
(1)
(μH)
18.8 ± 25%
22.4 ± 25%
27.2 ± 25%
32.8 ± 25%
40 ± 25%
48 ± 25%
60 ± 25%
72 ± 25%
88 ± 25%
108 ± 25%
132 ± 25%
156 ± 25%
188 ± 25%
224 ± 25%
272 ± 25%
328 ± 25%
400 ± 25%
480 ± 25%
600 ± 25%
720 ± 25%
880 ± 25%
1080 ± 25%
1320 ± 25%
1560 ± 25%
1880 ± 25%
2240 ± 25%
2720 ± 25%
4000 ± 30%
4800 ± 30%
1.176 ± 20%
3.808 ± 20%
5.688 ± 20%
7.944 ± 20%
13.58 ± 20%
20.73 ± 20%
DCR Typ.
(2)
(Ω)
0.076
0.092
0.096
0.100
0.116
0.124
0.144
0.158
0.190
0.240
0.300
0.320
0.360
0.380
0.420
0.560
0.600
0.820
0.920
1.02
1.38
1.80
2.04
2.24
3.06
3.38
4.58
5.10
5.66
0.0295
0.0400
0.0461
0.0521
0.0732
0.102
7.70
6.60
6.40
5.60
5.40
4.80
4.30
3.90
3.50
3.40
3.10
2.80
2.60
2.40
2.10
1.90
1.70
1.60
1.40
1.30
1.10
1.00
0.92
0.84
0.80
0.73
0.63
0.58
0.56
9.18
5.10
4.17
3.53
2.70
2.19
l
sat (3)
(A)
3.60
3.50
3.40
3.30
3.20
2.90
2.70
2.50
2.20
2.00
1.70
1.60
1.50
1.40
1.30
1.20
1.10
1.00
0.89
0.84
0.75
0.71
0.62
0.53
0.43
0.40
0.36
0.33
0.30
3.10
2.66
2.48
2.33
1.97
1.67
l
sat (4)
(A)
General Note
TT electronics reserves the right to make changes in product specification without notice or liability.
All information is subject to TT electronics’ own data and is considered accurate at time of going to print.
www.bitechnologies.com
© TT electronics plc
Rev : 1
Last Updated : 19 Aug 2013
05.12
Shielded Surface Mount Coupled Inductors
MODEL HM78D
Specifications @ 25°C continued
Parallel Connection
Part Number
HM78D-7556R8MLF
HM78D-7558R2MLF
HM78D-755100MLF
HM78D-755150MLF
HM78D-755220MLF
HM78D-755330MLF
HM78D-755470MLF
HM78D-755680MLF
HM78D-755820MLF
HM78D-755101MLF
HM78D-755151MLF
HM78D-755221MLF
HM78D-755331MLF
HM78D-755471MLF
HM78D-755681MLF
HM78D-755821MLF
HM78D-755102MLF
Notes:
Series Connection
l
sat (3)
(A)
3.67
3.40
3.17
2.48
2.13
1.73
1.41
1.19
1.11
0.99
0.81
0.66
0.54
0.46
0.38
0.35
0.31
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
L
(1)
(μH)
6.8 ± 20%
8.2 ± 20%
10 ± 20%
15 ± 20%
22 ± 20%
33 ± 20%
47 ± 20%
68 ± 20%
82 ± 20%
100 ± 20%
150 ± 20%
220 ± 20%
330 ± 20%
470 ± 20%
680 ± 20%
820 ± 20%
1000 ± 20%
DCR Typ.
(2)
(Ω)
0.0418
0.0441
0.0489
0.0637
0.0925
0.143
0.216
0.265
0.345
0.383
0.591
0.907
1.41
1.74
2.58
2.93
3.89
l
sat (4)
(A)
L
(1)
(μH)
29.38 ± 20%
34.26 ± 20%
39.53 ± 20%
64.36 ± 20%
86.92 ± 20%
132 ± 20%
198.6 ± 20%
278.7 ± 20%
323.8 ± 20%
406.4 ± 20%
600 ± 20%
908 ± 20%
1342 ± 20%
1861 ± 20%
2685 ± 20%
3251 ± 20%
4036 ± 20%
DCR Typ.
(2)
(Ω)
0.167
0.177
0.196
0.255
0.371
0.574
0.865
1.06
1.38
1.53
2.37
3.63
5.66
6.97
10.30
11.70
15.60
1.84
1.70
1.58
1.24
1.07
0.87
0.71
0.60
0.55
0.49
0.41
0.33
0.27
0.23
0.19
0.17
0.16
l
sat (3)
(A)
1.30
1.27
1.20
l
sat (4)
(A)
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
(1) Inductance is measured at 100 kHz, 0.1Vrms without DC current.
(2) DCR Typ. is only for 755 series while 128 series is of DCR Max.
(3) I
sat
is the saturation current at which inductance rolls off approximately 30% from its initial (zero DC) value.
(4) I
rms
is the approximate current at which
ΔT
= 40°C.
Outline Dimensions (mm)
Top View
Side View
Bottom View
Recommended Solder Pad Layout
Case Size
128
755
A
12.5
7.7
B
12.5
7.7
C
8.05
4.8
D
5.0
3.9
E
5.0
2.7
F
3.5
1.55
G
1.5
0.72
H
4.2
2.2
I
5.5
2.8
J
4.5
3.1
K
2.0
1.0
L
12.8
7.5
M
4.2
2.2
N
4.5
3.1
P
2.0
1.0
Q
4.2
2.2
R
5.5
2.8
S
4.5
3.1
Packaging
Standard:
Embossed Tape and Reel
Reel:
Diameter:
Capacity:
Case size 128
Case size 755
=
=
=
13” (330.2mm)
500 Units
1,000 Units
Ordering Information
HM78D - 128 4R7 M LF TR
Model Series
Case Size:
128, 755
Inductance Code:
First 2 digits are significant. Last digit denotes
the number of trailing zeros. For values below
10μH, “R” denotes the decimal point.
General Note
TT electronics reserves the right to make changes in product specification without notice or liability.
All information is subject to TT electronics’ own data and is considered accurate at time of going to print.
www.bitechnologies.com
Tape & Reel Packing
Lead-Free
Inductance Tolerance
K = ± 10%
M = ± 20%
© TT electronics plc
05.12
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