HM78D-128120MLFTR - BI Technologies Corporation

· Operating Temperature Range -40°C to +125°C

· Ambient Temperature, Maximum +85°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

Surface Mount

Coupled Inductors

MODELS HM78D-1210XXXMLF HM78D-1210XXXMLF

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.

05.12

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.

Leads connected in parallel Leads connected in series

Part Number L (μH) DCR

Max (Ω)

Irated

(A)

Isat

(A)

Irms

(A) L (μH) DCR

Max (Ω)

Irated

(A)

Isat

(A)

Irms

(A)

HM78D-12104R7MLF 4.70±20% 0.014 10.60 18.00 3.250 18.80±25% 0.056 5.30 9.00 1.625

HM78D-12106R8MLF 6.80±20% 0.017 10.40 14.20 3.100 27.20±25% 0.068 5.20 7.10 1.550

HM78D-12108R2MLF 8.20±20% 0.018 9.50 12.85 2.250 32.80±25% 0.072 4.75 6.45 1.125

HM78D-1210100MLF 10.00±20% 0.020 8.60 11.75 3.200 41.12±25% 0.080 4.30 5.85 1.600

HM78D-1210220MLF 22.00±20% 0.040 5.40 8.20 2.700 88.00±25% 0.160 2.70 4.10 1.350

HM78D-1210330MLF 33.00±20% 0.050 4.50 6.60 2.000 132.00±25% 0.200 2.25 3.30 1.000

HM78D-1210470MLF 47.00±20% 0.065 3.70 5.50 1.900 188.00±25% 0.260 1.85 2.75 0.950

HM78D-1210560MLF 56.00±20% 0.081 3.28 4.90 0.850 224.00±25% 0.324 1.64 2.45 0.425

HM78D-1210680MLF 68.00±20% 0.098 2.96 4.45 0.800 272.00±25% 0.392 1.48 2.20 0.400

HM78D-1210101MLF 100.00±20% 0.128 2.54 3.70 0.700 400.00±25% 0.512 1.27 1.85 0.350

HM78D-1210121MLF 120.00±20% 0.170 2.38 3.40 0.630 480.00±25% 0.680 1.19 1.70 0.315

HM78D-1210331MLF 330.00±20% 0.440 1.32 2.10 0.410 1320.00±25% 1.760 0.66 1.05 0.205

HM78D-1210471MLF 470.00±20% 0.570 1.22 1.80 0.300 1880.00±25% 2.280 0.61 0.90 0.150

Speciﬁcations @ 25°C

www.bitechnologies.com

Electrical Schematic

Mechanical Outline (mm)

Parallel mode

Autotransformer

and series modes

Coupled inductor,

transformer and

SEPIC modes

Recommended PCB Patern

HM78D-1210 XXX M LF TR

Surface Mount Coupled Inductors

MODELS HM78D-1210XXXMLF

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.

05.12

www.bitechnologies.com

Ordering Information

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.

1) Tape and reel packaging.

2) 300pcs per 13” reel.

Packaging

· 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

Shielded Surface

Mount Coupled Inductors

MODEL HM78D

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.

05.12

Speciﬁcations @ 25°C

www.bitechnologies.com

Electrical Schematic

Parallel Connection Series Connection

Part Number L (1)

(μH)

DCR Typ. (2)

(Ω)

lsat (3)

(A)

lsat (4)

(A)

L (1)

(μH)

DCR Typ. (2)

(Ω)

lsat (3)

(A)

lsat (4)

(A)

HM78D-1284R7MLF 4.7 ± 20% 0.019 14.90 7.40 18.8 ± 25% 0.076 7.70 3.60

HM78D-1285R6MLF 5.6 ± 20% 0.023 13.40 7.20 22.4 ± 25% 0.092 6.60 3.50

HM78D-1286R8MLF 6.8 ± 20% 0.024 13.10 6.90 27.2 ± 25% 0.096 6.40 3.40

HM78D-1288R2MLF 8.2 ± 20% 0.025 10.80 6.60 32.8 ± 25% 0.100 5.60 3.30

HM78D-128100MLF 10 ± 20% 0.029 10.50 6.20 40 ± 25% 0.116 5.40 3.20

HM78D-128120MLF 12 ± 20% 0.031 9.60 6.00 48 ± 25% 0.124 4.80 2.90

HM78D-128150MLF 15 ± 20% 0.036 9.10 5.80 60 ± 25% 0.144 4.30 2.70

HM78D-128180MLF 18 ± 20% 0.040 8.00 5.50 72 ± 25% 0.158 3.90 2.50

HM78D-128220MLF 22 ± 20% 0.048 6.80 5.20 88 ± 25% 0.190 3.50 2.20

HM78D-128270MLF 27 ± 20% 0.060 6.50 4.70 108 ± 25% 0.240 3.40 2.00

HM78D-128330MLF 33 ± 20% 0.075 5.60 4.20 132 ± 25% 0.300 3.10 1.70

HM78D-128390MLF 39 ± 20% 0.080 5.50 3.60 156 ± 25% 0.320 2.80 1.60

HM78D-128470MLF 47 ± 20% 0.090 5.20 3.00 188 ± 25% 0.360 2.60 1.50

HM78D-128560MLF 56 ± 20% 0.095 4.50 2.80 224 ± 25% 0.380 2.40 1.40

HM78D-128680MLF 68 ± 20% 0.105 4.10 2.60 272 ± 25% 0.420 2.10 1.30

HM78D-128820MLF 82 ± 20% 0.140 3.80 2.30 328 ± 25% 0.560 1.90 1.20

HM78D-128101MLF 100 ± 20% 0.150 3.40 2.00 400 ± 25% 0.600 1.70 1.10

HM78D-128121KLF 120 ± 10% 0.205 3.20 1.90 480 ± 25% 0.820 1.60 1.00

HM78D-128151KLF 150 ± 10% 0.230 2.80 1.80 600 ± 25% 0.920 1.40 0.89

HM78D-128181KLF 180 ± 10% 0.255 2.50 1.70 720 ± 25% 1.02 1.30 0.84

HM78D-128221KLF 220 ± 10% 0.345 2.30 1.60 880 ± 25% 1.38 1.10 0.75

HM78D-128271KLF 270 ± 10% 0.450 2.10 1.50 1080 ± 25% 1.80 1.00 0.71

HM78D-128331KLF 330 ± 10% 0.510 1.90 1.30 1320 ± 25% 2.04 0.92 0.62

HM78D-128391KLF 390 ± 10% 0.560 1.70 1.10 1560 ± 25% 2.24 0.84 0.53

HM78D-128471KLF 470 ± 10% 0.765 1.60 0.87 1880 ± 25% 3.06 0.80 0.43

HM78D-128561KLF 560 ± 10% 0.845 1.50 0.83 2240 ± 25% 3.38 0.73 0.40

HM78D-128681KLF 680 ± 10% 1.145 1.30 0.76 2720 ± 25% 4.58 0.63 0.36

HM78D-128821KLF 820 ± 10% 1.275 1.20 0.69 4000 ± 30% 5.10 0.58 0.33

HM78D-128102KLF 1000 ± 10% 1.415 1.10 0.60 4800 ± 30% 5.66 0.56 0.30

HM78D-755R33MLF 0.33 ± 20% 0.0074 18.4 0 6.20 1.176 ± 20% 0.0295 9.18 3.10

HM78D-7551R0MLF 1.0 ± 20% 0.0100 10.20 5.33 3.808 ± 20% 0.0400 5.10 2.66

HM78D-7551R5MLF 1.5 ± 20% 0.0115 8.35 4.96 5.688 ± 20% 0.0461 4.17 2.48

HM78D-7552R2MLF 2.2 ± 20% 0.0130 7.06 4.66 7.944 ± 20% 0.0521 3.53 2.33

HM78D-7553R3MLF 3.3 ± 20% 0.0183 5.40 3.94 13.58 ± 20% 0.0732 2.70 1.97

HM78D-7554R7MLF 4.7 ± 20% 0.0254 4.37 3.34 20.73 ± 20% 0.102 2.19 1.67

Coupled Inductors, transformer and SEPIC mode Autotransformer and series mode Parallel Mode

HM78D - 128 4R7 M LF TR

Shielded Surface Mount Coupled Inductors

MODEL HM78D

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.

05.12

www.bitechnologies.com

Ordering Information

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.

Tape & Reel Packing

Lead-Free

Inductance Tolerance

K = ± 10%

M = ± 20%

Speciﬁcations @ 25°C continued

Parallel Connection Series Connection

Part Number L (1)

(μH)

DCR Typ. (2)

(Ω)

lsat (3)

(A)

lsat (4)

(A)

L (1)

(μH)

DCR Typ. (2)

(Ω)

lsat (3)

(A)

lsat (4)

(A)

HM78D-7556R8MLF 6.8 ± 20% 0.0418 3.67 2.60 29.38 ± 20% 0.167 1.84 1.30

HM78D-7558R2MLF 8.2 ± 20% 0.0441 3.40 2.53 34.26 ± 20% 0.177 1.70 1.27

HM78D-755100MLF 10 ± 20% 0.0489 3.17 2.41 39.53 ± 20% 0.196 1.58 1.20

HM78D-755150MLF 15 ± 20% 0.0637 2.48 2.11 64.36 ± 20% 0.255 1.24 1.05

HM78D-755220MLF 22 ± 20% 0.0925 2.13 1.75 86.92 ± 20% 0.371 1.07 0.874

HM78D-755330MLF 33 ± 20% 0.143 1.73 1.41 132 ± 20% 0.574 0.87 0.702

HM78D-755470MLF 47 ± 20% 0.216 1.41 1.15 198.6 ± 20% 0.865 0.71 0.573

HM78D-755680MLF 68 ± 20% 0.265 1.19 1.03 278.7 ± 20% 1.06 0.60 0.517

HM78D-755820MLF 82 ± 20% 0.345 1.11 0.91 323.8 ± 20% 1.38 0.55 0.453

HM78D-755101MLF 100 ± 20% 0.383 0.99 0.86 406.4 ± 20% 1.53 0.49 0.430

HM78D-755151MLF 150 ± 20% 0.591 0.81 0.69 600 ± 20% 2.37 0.41 0.346

HM78D-755221MLF 220 ± 20% 0.907 0.66 0.56 908 ± 20% 3.63 0.33 0.279

HM78D-755331MLF 330 ± 20% 1.41 0.54 0.45 1342 ± 20% 5.66 0.27 0.224

HM78D-755471MLF 470 ± 20% 1.74 0.46 0.40 1861 ± 20% 6.97 0.23 0.202

HM78D-755681MLF 680 ± 20% 2.58 0.38 0.33 2685 ± 20% 10.30 0.19 0.166

HM78D-755821MLF 820 ± 20% 2.93 0.35 0.31 3251 ± 20% 11.70 0.17 0.156

HM78D-755102MLF 1000 ± 20% 3.89 0.31 0.27 4036 ± 20% 15.60 0.16 0.135

Case Size A B C D E F G H I J K L M N P Q R S

128 12.5 12.5 8.05 5.0 5.0 3.5 1.5 4.2 5.5 4.5 2.0 12.8 4.2 4.5 2.0 4.2 5.5 4.5

755 7.7 7.7 4.8 3.9 2.7 1.55 0.72 2.2 2.8 3.1 1.0 7.5 2.2 3.1 1.0 2.2 2.8 3.1

Notes: (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) Isat is the saturation current at which inductance rolls off approximately 30% from its initial (zero DC) value.

(4) Irms is the approximate current at which ΔT = 40°C.

Standard:

Embossed Tape and Reel

Reel: Diameter: = 13” (330.2mm)

Capacity: Case size 128 = 500 Units

Case size 755 = 1,000 Units

Packaging

Outline Dimensions (mm)

Top View Side View Bottom View Recommended Solder Pad Layout