wurth electronics product line · 7447797820 10,2 x 10,2 x 4,5 8.20 30.00 5.80 4.80 31 *) all...

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“The Design Fulfillment Distributor”

The Newest Products for Your Newest Designs®

Presented byMouser Electronics

WURTH ELECTRONICSProduct Line

forFlat Wire Inductors

Würth Elektronik eiSos © 2010

Purpose Introduction of the WE-PDF Flatwire Inductor series

Objectives Overview of the available products Explain the key features and technical background of Flatwire Technology explanation flatwire advantages typical applications

Content 13 pages

Introduction


extended temperature range

lower AC-Resistance

low core losses

Introduction of the new Flat Wire Inductor WE-PDF from Wurth Electronics Midcom


Electrical Characteristics WE-PDF

4,56,4 max

Land pattern (mm)Dimensions (mm)

Characteristics:

• size: 10,2 x 10,2 mm

• low profile: 6.4 mm

• switching frequency range: up to 10 MHz

• Operating Temperature: up to 150 C

• L-value 0.22uH - 30uH

• high IRMS: up to 10.3 A

• high ISAT: up to 30A

• low DCR: 6.2mΩ to 43mΩ


Copper losses DC losses => depending on DCR only ! AC losses => depends on type of wire, winding structure & frequency

Skin Effect Proximity Effect

Core losses (dependent on core material)• Hysteresis loss• Eddy current losses

CoreCoppertotal PPP

Losses : Copper and Core

- losses in an inductor :


Copper Loss – What does everybody know about DCR?

depends on DCR only CopperP

ρ = material dependent factor

Improvement? easiest parameter to change?

cross section [A]

A DCR PV

1st assumption:

The bigger the cross section, the lower the DCR, the lower the power loss.

1st target: increase cross section ( i.e. thicker wire )

ρ

AlDCR

l

A


Copper Loss – What does everybody know about DCR?

improvement / ideas?

increase wire thickness

Ø=1mm Ø=2mm

multiple wires

4x Ø=1mm 4x Ø=1mm

flatwire (fullfilled window)

1mm x 4mm

A=0.75mm² A=3.14mm²

A=3.14mm² A=4mm²

DCR=22mΩ DCR=5.14mΩ

DCR=5.14mΩ DCR=4mΩ

l=1mm

multiple wires

A=3.14mm²DCR=5.14mΩ


Copper Loss – What about frequency dependence?

depends also on ACR CopperP

f ACR

2nd assumption:

frequencyincrease

blue area: part of wire driven by AC

yellow: copper not driven by AC unused !!!

conclusion:

The higher the frequency the higher the frequency dependent resistance

0.1kHz 1kHz 400kHz

called skin depth

ACRDCRCopper PPP


Proximity effect :

Proximity effect : only a small part of the wire will be driven with current (the skin)

like increasing the DCR

higher copper losses for higher switching frequencies

f PV

Copper Loss – What about frequency dependence?


Equivalent Series Resistance,the resistance in the equivalent circuit of a choke, which represents the copper losses with an increase of frequency

ESR – frequency dependent resistance


Compare: flat wire

Cross section flat wire and round wire: 10mm2

BUT: flat wire has more surface area Aflat =1,2 x Around

AND: high frequency current use only the surface Skin & Proximity effect

10mm1mm

1,78 mm

VS. round wire

Losses - Skin effect / Proximity effect

A ACR+

DCRPVf R( )

2nd target: increase surface

The problem is:

( change wire type )


General

WE-PD

Ø=1mm 1mm x 4mm

A=0.75mm² A=4mm²DCR=22mΩ DCR=4mΩ

WE-PDF

free space on drum core fullfilled wire window on drum core

improved AC resistance higher performance

the difference is not visible, if you just hold the part in your hands


Typical applications

WE-PDF

• Multiphase Converters• High Frequency Converters• High Current Converters• Motherboards• Industrial Computers• Set Top Boxes• FPGA Power Supplies


Extended use in non-typical applications

WE-PDF

released operating temperature

-40 C to +150 C (instead of -40 C/+125 C)

designed to ensure the use in applications

’’automotive like’’

industrial

adverse environmental conditions

extreme environments exceeding ratings of standard components


New development – WE-PDF 1064

7447798022 10.2 x 10.2 x 6.4 0.22 6.2 30.0 10.3 3807447798050 10.2 x 10.2 x 6.4 0.50 6.6 23.0 9.5 1807447798110 10.2 x 10.2 x 6.4 1.10 7.6 16.0 9.3 1157447798180 10.2 x 10.2 x 6.4 1.80 8.5 12.8 9.0 787447798250 10.2 x 10.2 x 6.4 2.50 9.1 10.1 8.6 617447798360 10.2 x 10.2 x 6.4 3.60 9.8 8.60 7.9 497447798470 10.2 x 10.2 x 6.4 4.70 11.7 7.60 7.5 427447798620 10.2 x 10.2 x 6.4 6.20 13.0 6.70 7.0 407447798720 10.2 x 10.2 x 6.4 7.20 15.9 6.00 6.5 347447798910 10.2 x 10.2 x 6.4 9.10 17.2 5.60 6.2 307447798111 10.2 x 10.2 x 6.4 11.00 18.9 5.10 5.8 277447798131 10.2 x 10.2 x 6.4 13.00 24.0 4.50 5.2 257447798151 10.2 x 10.2 x 6.4 15.00 25.6 4.25 4.9 227447798181 10.2 x 10.2 x 6.4 18.00 27.5 4.00 4.7 207447798221 10.2 x 10.2 x 6.4 22.00 35.6 3.75 4.1 187447798241 10.2 x 10.2 x 6.4 24.00 38.0 3.55 4.0 177447798271 10.2 x 10.2 x 6.4 27.00 40.5 3.40 3.9 167447798301 10.2 x 10.2 x 6.4 30.00 43.5 3.10 3.7 14

Order CodeSize

[mm]

Inductance (1)

±20%[uH]

DCRtyp.

[mΩ]

Isat.(3)

[A]

Irms. (4)

[A]

SRF

[MHz]

7447797022 10,2 x 10,2 x 4,5 0.22 9.50 22.00 8.80 3507447797050 10,2 x 10,2 x 4,5 0.50 11.00 21.00 8.50 2507447797110 10,2 x 10,2 x 4,5 1.10 12.50 16.00 7.60 1277447797180 10,2 x 10,2 x 4,5 1.80 13.00 13.30 7.30 907447797300 10,2 x 10,2 x 4,5 3.00 15.00 10.50 7.00 707447797360 10,2 x 10,2 x 4,5 3.60 17.00 9.70 6.80 567447797470 10,2 x 10,2 x 4,5 4.70 23.00 8.00 5.80 527447797620 10,2 x 10,2 x 4,5 6.20 25.00 7.50 5.50 437447797820 10,2 x 10,2 x 4,5 8.20 30.00 5.80 4.80 31

*) All electrical specifications based on 25 C**) It is recommended that the temperature of the part does not exceed more then

150 C under worst case operating conditions. Temperature of the part shouldbe verified in the final application.

Notes:1) Inductance value measured at 100KHz; [5mA]2) ISAT is defined due a drop off of 10% of the initial inductance value [L0]3) Irms is defined due DC Current which will cause a temperature rise of 40K

1045 1064


Summary

• Increase the efficiency of your application with a cost effective part• 2 different sizes – 1045 low profile, 1064 standard • Fits on many standard footprints of common manufacturers


Overview WE-HCx series

- toleranced DCR- high Isat – core material iron powder- low ACR (Skin-/Proximity)

- 7x7 up to 22A

- 10x10 up to 25A

size DCR [mΩ] Isat [A] IRMS [A]

7x7x3

Lo [uH]

0.91

14.2

48.0

9.007x7x4

7x7x5

10x10x3

10x10x4

10x10x5

744310xxx

744311xxx

744314xxx

744323xxx

744325xxx

0.13

2.00

22.0

6.501.10

19.5

32.0

7.00

0.22

4.70

21.0

6.50

1.00

33.0

28.0

4.00

0.24

10.0

20.0

3.50

2.17

11.38

36.0

15.0

0.33

2.20

18.0

9.00

0.58

14.10

60.0

8.0

0.15

4.30

25.0

8.00.51

10.3

58.0

12.0

0.16

5.50

25.0

10.0

7443552xxx

WE-PERMSuperflux

HCA

HC

HC

HC

HC

HC


- 13x13 up to 32A

- 18x18 up to 42A

13x13x3.5 744313xxx

13x13x5.0 7443550xxx

0.60

8.10

60.0

14.0

0.25

3.30

24.0

12.0

0.50

14.1

60.0

10.0

0.19

10.0

29.0

9.00

13x13x6.5 7443551xxx0.35

24.7

65.0

6.50

0.20

22.0

32.0

6.00

size DCR [mΩ] Isat [A] IRMS [A]Lo [uH]

Iron PowderWE-PERMSuperflux

HCA

HCA

HC

18x18x9.0 7443556xxx0.54

6.90

65.0

21.0

0.82

10.0

41.5

15.0 HCB

18x18x9.0 7443557xxx7.10

34.0

18.5

7.0

10.0

47.0

16.5

6.8 HCB

MnZn

Overview WE-HCx series

Mouser Proprietary and Confidential

The Newest Products for Your Newest Designs® mouser.com

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This ends the product presentation

wurth electronics product line · 7447797820 10,2 x 10,2 x 4,5 8.20 30.00 5.80 4.80 31 *) all...

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