Ferrite Specifications and ACME Ferrites (1)

ACME Electronics Corporation 1

Ferrite Specification&

ACME Ferrites

Technical Aspects

By Ray Lai, FAEJune 2015

With Supports of RD & Marketing Teams

ACME Electronics Corporation

Table of Content

1. Specifications of Ferrites – Materials & Products2. ACME ferrite road map and development trend

3. Technical Application Example: CMC

4. Technical Application Example: DC-DC choke

5. Technical Application Example: SMPS transformer

6. Appendix A: Further on ferrite specifications

7. Appendix B: (a) Fringing effect of gapped core (b) Manipulating magnetizing curve

8. Appendix C: An analogy and differentiation on R, C, and L and why magnetic components are so UNIQUE

Q & A2


1. Specifications of Ferrites – Materials & Products

3

A typical ferrite “material” specification looks like



Looking at the material specification, what image pops up in our mind? This or those?

The specification sheet generally seen are measured with a fixed core geometry with center turns of winding.


1. Specifications of Ferrites – Materials & ProductsFerrite Production is a time consuming process with many variables –explicit or implicit

Fe2O3

MnO2

ZnO……



Trilogy of Magnetizing Curve (only B-H Curve is well known, but it’s a “derivative”)

a. B-H curve b. -F curve c. -i curve

𝑢𝑟=𝑑𝐵𝑑𝐻 𝐴𝐿=

𝑑𝜙𝑑𝐹 𝐿=

𝑑 Λ𝑑𝑖

“Initial” Permeability

“Material Specification

Single Turn Inductance

“Product” Specification

DeviceInductance

Measurable

What Ampere’s law and Faraday law of magnetic induction

are based on



B-H Curve is a “derived” characteristic1. From a closed-loop fix core geometry (usually toroid core),

why? Considering most of the power applications are not ring core and normally with air gap.

2. Under a fixed condition (low frequency low flux density sinusoidal excitation), why? Considering the majority of ferrite is for mid-to-high frequency square-wave driven SMPS application with as high as possible flux density

For practical design purposes, most of the time, the published material specification (i.e., B-H Curve) is just like TV commercial, what you see is not always what you get!



B-H curve is a critical index for ferrite powder maker to qualify its material quality. ACME as a ferrite producer, uses it to roll out the property roadmap of his powders per the application demands.

On the other hand, in real application, the core geometry takes equally the same importance in meeting the desired performance required by a design.

Magnetic component designer must understand the catches on the material specifications and have good knowledge on core design issues to provide a sound design for the intended applications (adapter, converter, WPC, etc.,)



Key specifications

a. Permeability ui and ua from B-H curve

b. Saturation flux density Bsat

c. Core loss density Pv

d. Effective Bandwidth

will be explained in detail. The rest specification items:

Remanence (Brms) and Coercivity (Hc), Hysteresis Material Constant (ηB), Disaccommodation Factor (DF) and Quality Factor (Q) will be discussed in Appendix A



Why B-H Curve is so important for Ferromagnetic Material

Magnetic Field H

Flux density B

Permanent magnetics永磁

Soft magnetic material軟磁

Bsat


1. Specifications of Ferrites – Materials & ProductsMaterial Specification: Permeability ui and ua

Freq. Flux den. Temp. P45 P46 P47

Initial Permeability μi ≤ 10KHz 0.25mT 25°C 3100 ± 25% 3300 ± 25% 3000 ± 25%

25°C > 5000 > 4500 > 5000

100°C > 5000 > 4500 > 5000

Unit Measuring Conditions Wide Temperature Low Loss Materials

Amplitude Permeability μa 25KHz 200mT

Symbol

Specifications in table are only for fixed conditions

But, permeability is actually a function of Temperature and Load and it’s non-linear


1. Specifications of Ferrites – Materials & ProductsMaterial Specification: Permeability ui and ua Permeability is a function of Temperature


1. Specifications of Ferrites – Materials & ProductsMaterial Specification: Permeability ui and ua TSMP is a critical factor if close to 20~30℃


1. Specifications of Ferrites – Materials & ProductsMaterial Specification: Permeability ui and ua Permeability is a function of Load

Faraday law of magnetic induction and Ampere’s law are the corner stones

By Ampere’s law, rewrite the Faraday law of induction



If is sinusoidal excitation , then the current will be in the same form with phase delay

Taking out the time variant term



is the flux generated by this condition (it is flux that drives the E-M conversion, not flux density )


1. Specifications of Ferrites – Materials & ProductsMaterial Specification: Permeability ui and ua Permeability is a function of LoadIn SMPS, the excitation is square-like waveform

is the flux generated by this condition (it is flux that drives the E-M conversion, not flux density )

Volt-Second Balance is the key of E-M conversion


1. Specifications of Ferrites – Materials & ProductsMaterial Specification: Permeability ui and ua

The difference between ui and ua is the flux (thus flux density) applied.

ui is just ua under extremely low flux density condition



B-H curve is a “Hysteresis loop” (Pętla histerezy)

Flux Density B[T]

Magnetic Residue Br

Coercive Force Hc

Magnetic FieldH [A/m]

Saturation (Bsat)

Hmax



Przenikalność początkowa 初磁導率Initial Permeability

0H0i H

Bµ1µ

0.1mT



µi initial permeability

µm maximal permeability

µa amplitude permeability

µdif or µrev reverse permeability

)1.0,25(

)1.0,25(

)1.0,25(

)( mTBkHzf

mTBkHzf

mTBkHzf

ACDCrevdif

ACa

ACi

iiii


1. Specifications of Ferrites – Materials & ProductsDC-DC Application udiff or urev

HHrev

ACHB

µµ

0

1



Reversible permeability at different operating points


1. Specifications of Ferrites – Materials & ProductsMaterial Specification: Saturation Flux Density Bsat

The importance of Bmax is well emphasized and all ferrite vendors advertise their materials by this property along with the core loss density Pcv. But there is a catch: under what Hmax?

Only this portion of ferrite B-H is actually useful

This is the real usable Hmax range for soft ferrite and SMPS designer should be care about the Bmax available in the maximal applied H range

The proviso for Bsat= 530mT is H =1200A/m, this is the legal commercial employed by the industry. Useless in practical designs

ACME Electronics Corporation25


B-H Curves from FXC, DMEGC, and TDG



Only ferrite does the bluffing? NO!

Look at the siliconsteel sheet for power transformer

=79.58A/m



The effect of Hysteresis loop (Brms and Hc) can be illustrated by SPICE circuit simulation.

Using the built-in TX22_14_13_3E27 model (ui=6000)

* TX22_14_13_3E27 CORE model.MODEL TX22_14_13_3E27 CORE+ MS=377.56E3+ A=12.672+ C=.20161+ K=5.5151+ AREA=.507 (cm^2)+ PATH=5.4200 (cm)

Simulate an “ideal” inductor and the “real” inductor by 10 turns of winding with TX22_14_13_3E27



L 5

10

1

2R 5

1

8

V 3

F R E Q = 1 0 0 kV A M P L = 1 0V O F F = 0

7

0

K

COUPLING=

K 3

1TX2 2 _ 1 4 _ 1 3 _ 3 E 2 7

R 6

1

L 670 5 . 3 u H

1

2

V 4

F R E Q = 1 00 kV A M P L = 1 0V O F F = 0

9 10

0

Time

19.950ms 19.955ms 19.960ms 19.965ms 19.970ms 19.975ms 19.980ms 19.985ms 19.990ms 19.995ms 20.000msI(R5) I(R6)

-20mA

0A

20mA

Bmax31.13mT



L 5

10

1

2R 5

1

8

V 3

F R E Q = 1 0 0 kV A M P L = 1 0V O F F = 0

7

0

K

COUPLING=

K 3

1TX2 2 _ 1 4 _ 1 3 _ 3 E 2 7

R 6

1

L 670 5 . 3 u H

1

2

V 4

F R E Q = 1 00 kV A M P L = 1 0V O F F = 0

9 10

0

Frequency

0Hz 100KHz 200KHz 300KHz 400KHz 500KHz 600KHz 700KHz 800KHz 900KHz 1000KHzI(R5)

0A

10mA

20mA

I(R6)0A

10mA

20mA

SEL>>

Bmax31.13mT



Bmax311.3mTL 5

1 0

1

2R 5

1

8

V 3

F R E Q = 1 0 0 kV A M P L = 1 0 0V O F F = 0

7

0

K

COUPLING=

K 3

1TX2 2 _ 1 4 _ 1 3 _ 3 E 2 7

R 6

1

L 67 0 5 . 3 u H

1

2

V 4

F R E Q = 1 0 0 kV A M P L = 1 0 0V O F F = 0

9 1 0

0

Time

19.950ms 19.955ms 19.960ms 19.965ms 19.970ms 19.975ms 19.980ms 19.985ms 19.990ms 19.995ms 20.000msI(R5) I(R6)

-200mA

0A

200mA



Bmax311.3mTL 5

1 0

1

2R 5

1

8

V 3

F R E Q = 1 0 0 kV A M P L = 1 0 0V O F F = 0

7

0

K

COUPLING=

K 3

1TX2 2 _ 1 4 _ 1 3 _ 3 E 2 7

R 6

1

L 67 0 5 . 3 u H

1

2

V 4

F R E Q = 1 0 0 kV A M P L = 1 0 0V O F F = 0

9 1 0

0

Frequency

0Hz 100KHz 200KHz 300KHz 400KHz 500KHz 600KHz 700KHz 800KHz 900KHz 1000KHzI(R5)

0A

100mA

200mA

SEL>>

I(R6)0A

100mA

200mA



If the inductor or transformer design is not carefully engaged per the specified operation conditions. It might result in serious distortion and endanger the application or device.

Below is an extreme case.L1

5

1

2R 1

5 0

2

V 1

F R E Q = 1 0 0 kV A M P L = 1 0 0V O F F = 0

1

0

K

COUPLING=

K 1

0 . 9 9TX2 2 _ 1 4 _ 1 3 _ 3 E 2 7

L 35

1

2

R 350 0

3

Time

19.950ms 19.955ms 19.960ms 19.965ms 19.970ms 19.975ms 19.980ms 19.985ms 19.990ms 19.995ms 20.000msV(1) V(3)

-100V

-50V

0V

50V

100V



Ferroxcube 3C95 Material SpecificationPv @100kHz/200mT/25 = ℃ 350mW/cm^3Pv @100kHz/200mT/100 =℃ 290mW/cm^3

Ferroxcube 3C95 Product SpecificationPQ26/25

Pv @100kHz/200mT/25 = 4.0W/6.530cm^3=℃ 613mW/cm^3Pv @100kHz/200mT/100 =3.8mW/6.530cm^3=℃ 582mW/cm^3

PQ35/41Pv @100kHz/200mT/25 = 11.5W/18.5cm^3=℃ 622mW/cm^3Pv @100kHz/200mT/100 =10.8W/18.5cm^3=℃ 584mW/cm^3

A good example of ferrite material commercial: Pv Issue



Pv Issue



Material Specification from TDK

Pv Issue



PQ32/25 Ve=12.44cm^3

30℃ Pv= ~ 580mW/cm^3

100 ℃ Pv= ~400mW/cm^3

80 ℃ Pv= ~335mW/cm^3Pv quality in pg. 34 & 35 is not practical in real life

Pv Issue


1. Specifications of Ferrites – Materials & ProductsComparing Pg. 34 and 36 Pv Issue1. Pg. 34 is a “material” comparison, using ring core in small

sizes. (T25x15x10)

2. Pg. 36 is a “mass-production” comparison, using the real cores that would applied in real design scenario.

3. Keeping all conditions the same, (larger) product Pv will be always higher than material Pv for the reason of existing gap, no matter how smooth the contact surface is.

4. Material is defined to have Pv_min at 100℃ but in real mass production products, the Pv_min point will shift toward around 80 or 90 , ℃ ℃ which is inevitable by the trade off between quality and cost in real life.

38

TDG TPW33 Pv = 469mW/cc @ 100 / 200mT/100kHz℃ DMEGC DMR95E Pv = 480mW/cc @ 100 / 200mT/100kHz℃

Competitors Benchmark Reference

　 PQ cores losses (kW/m^3)

25℃ 100℃ Note

DMR95E PQ26/20 447.81 551.53 5pcs from customer

TPW33 PQ26/20 548.06 574.24 5pcs from customer

3C95 PQ26/20 & 20/20 480.23 446.00 10pcs from FXC product batch

3C95 Material Pv spec 350 290 HB2009

3C95 smaller core Pv spec 590 560 HB2009



Critical in common mode choke design selection


1. Specifications of Ferrites – Materials & ProductsMaterial goal higher µi with improved frequency stability

basically against physical principles

where:fg – gyromagnetic critical frequencyγ ~0.22 ΜΗz m/A is the gyromagnetic ratio for an electron

i.e. the ratio of magnetic moment and torqueBs – saturation flux densityμi,0– initial permeability * J. L. Snoek, Physica 14, 207, 1948

sig Bf 34)1( 0, Snoek Limit



For CMC, it’s not always the higher ui the better

Note: great chance that A151 in mass production cannot sustain such high ui through all frequencies

　 Z (Ω)Hz A07H A151100k 1.648E+03 3.343E+03150k 2.568E+03 4.109E+03200k 3.517E+03 4.609E+03500k 9.086E+03 5.938E+031000k 1.486E+04 5.938E+03


1. Specifications of Ferrites – Materials & ProductsCharacteristics of Mn-Zn and Ni-Zn Ferrite in the sense of ui vs. frequency

All governed by Snoek limit.


2. ACME ferrite road map and development trend

With the key specifications of Ferrites explained, the ACME product roadmap is more easier to understand and select the suitable one for the application.

The roll-out of all materials are based on the various real application needs (power, telecom, EMC, RF, etc.,) in

Loss level (in specific conditions) Frequency bandwidth Permeability Temperature and Temperature stability


2. ACME ferrite road map and development trendACME provides ferrite materials in all applications: MnZn Power

MnZn powermaterials

Low LossHigh Bs

High Freq. Temp. Tendency

P4

P41P42

P5P51

P52

P46

P47

25 ~100℃℃

25 ~120℃℃

700KHz

1MHz

250kW/m3

450kW/m3

350kW/m3420mT

P45

P48

P611~5MHz

460mT

Low ŋB

N4

N42

N43

N5

N51

DC-Bias

High Z

P49

P62

P491


For MnZn ferrite in power applications, the key specifications are

　 Symbol UnitMeasuring Conditions Low Loss Material

Freq. Flux den. Temp. P4 P41 P42 P48(NEW)

Initial Permeability μi 　 10kHz 　 0.25mT 　 25°C 2500±

25%2400±25

%1800± 25%

2500± 25%

Amplitude Permeability

μa 　 25kHz 200mT 25°C ＞ 4500 ＞ 4500 ＞ 5000 ＞ 5000100°C ＞ 4500 ＞ 4500 ＞ 5000 ＞ 5000

Power Loss Pv KW/m3 100kHz 200mT 25°C 700 650 750 550100°C 450 350 350 250

300kHz 100mT 25°C 660 820 900 500100°C 430 500 500 300

500kHz 50mT 25°C 380 400 450 250100°C 330 300 300 200

Saturation Flux Density

Bms mT 10kHz H = 1200A/m

25°C 480 495 520 515100°C 380 395 420 410

Curie Temperature

Tc °C 　　　 >220 >230 >240 >220

Resistivity ρ Ωm 　　　 5.50 4.00 8.00 5.00





Core loss is a function of temperature and it isa deep V shape for general power ferrites



Low Loss and High Saturation Flux Density Material Characteristics　 Symbol Unit Measuring Conditions Material

　　　 Freq. Flux den. Temp. P47 P45

Initial Permeability μi 　 10kHz < 0.25mT 25°C 3000± 25% 3100± 25%

Power Loss Pcv kW/m3 100kHz 200mT

25°C 400 365

60°C 　 290

80°C 　 270

100°C 350 260

120°C 　 310

140°C 　 380

Saturation Flux Density Bs mT 1kHz H = 1200A/m

25°C 520 530

100°C 420 405

Remanence Br mT 1kHz H = 1200A/m25°C 85 80

100°C 70 60

Coercivity Hc A/m 1kHz H = 1200A/m25°C 10 10

100°C 7 6

Curie Temperature Tc °C 　　　 > 220 240

Special materials to have a flatter Pv vs. temperature curve



Power Loss VS. Temperature

0

100

200

300

400

500

600

700

800

20 30 40 50 60 70 80 90 100 110 120 130 140 150 160Temperature(oC)

Pow

er L

oss(

kW/m

3 )

Test Core ：T25×15×10

P47

P45

200mT,100KHz





Core loss performance of P45 (benching 3C97)Power Loss VS. Temperature

0

100

200

300

400

500

600

700

800

20 30 40 50 60 70 80 90 100 110 120 130 140 150 160Temperature(oC)

Pow

er L

oss(

kW/m

3 )

Test Core ：T25×15×10

100mT,300KHz

200mT,100KHz

50mT,500KHz

100mT,200KHz

P45



• Hysteretic Loop of P492. ACME ferrite road map and development trend








T25*15*101200A/m 10kHz,P-gain:10,N1=N2=20Ts



• New designs for high current power inductor may increase the operation frequency up to 1.5 ~ 3 MHz to reduce the core sizes.

• P61 CI type cores passed the final testing results from clients under 200mT/1~3MHz condition in mass production status now.







fswitch [Hz]duty-cycle Irip [A] mT (?) T [°C] #1 #2 #3 #4 #51.00E+06 5.00E-01 2.10E+00 100 25 215.07 202.98 216.44 206.52 206.801.00E+06 5.00E-01 4.11E+00 200 25 1,296.72 1,227.18 1,216.33 1,191.80 1,226.021.00E+06 5.00E-01 2.02E+00 100 100 231.57 216.40 224.81 231.71 226.951.00E+06 5.00E-01 3.95E+00 200 100 1,349.69 1,372.45 1,358.02 1,388.81 1,407.062.00E+06 5.00E-01 1.99E+00 100 25 921.31 924.93 872.21 864.00 871.182.00E+06 5.00E-01 3.94E+00 200 25 4,143.46 4,186.04 4,048.78 4,134.14 3,996.122.00E+06 5.00E-01 1.92E+00 100 100 1,099.52 1,058.99 1,089.94 1,047.91 1,084.282.00E+06 5.00E-01 3.70E+00 200 100 5,034.51 5,176.33 5,203.89 5,125.00 5,282.603.00E+06 5.00E-01 1.84E+00 100 25 2,270.11 2,208.32 2,196.73 2,202.43 2,235.133.00E+06 5.00E-01 3.55E+00 200 25 9,315.22 9,637.46 9,715.79 9,824.53 9,563.893.00E+06 5.00E-01 1.77E+00 100 100 2,597.86 2,609.84 2,668.96 2,616.68 2,692.543.00E+06 5.00E-01 3.10E+00 200 100 16,096.09 15,468.91 15,854.08 16,010.92 15,980.12

Pcv (mW/cm̂ 3)P61 High Frequency Low Loss Material



fswitch [Hz]duty-cycle Irip [A] mT (?) T [°C] #1 #2 #3 #4 #51.00E+06 5.00E-01 2.10E+00 100 25 7.52E-07 7.39E-07 7.44E-07 7.35E-07 7.35E-071.00E+06 5.00E-01 4.11E+00 200 25 7.68E-07 7.53E-07 7.56E-07 7.47E-07 7.49E-071.00E+06 5.00E-01 2.02E+00 100 100 7.76E-07 7.73E-07 7.81E-07 7.71E-07 7.75E-071.00E+06 5.00E-01 3.95E+00 200 100 7.92E-07 7.84E-07 7.92E-07 7.88E-07 7.86E-072.00E+06 5.00E-01 1.99E+00 100 25 7.67E-07 7.62E-07 7.66E-07 7.58E-07 7.51E-072.00E+06 5.00E-01 3.94E+00 200 25 7.60E-07 7.56E-07 7.60E-07 7.48E-07 7.46E-072.00E+06 5.00E-01 1.92E+00 100 100 7.96E-07 8.00E-07 8.01E-07 7.94E-07 7.96E-072.00E+06 5.00E-01 3.70E+00 200 100 8.00E-07 7.98E-07 8.03E-07 7.99E-07 8.01E-073.00E+06 5.00E-01 1.84E+00 100 25 7.84E-07 7.76E-07 7.85E-07 7.75E-07 7.71E-073.00E+06 5.00E-01 3.55E+00 200 25 8.02E-07 7.96E-07 8.03E-07 7.90E-07 7.88E-073.00E+06 5.00E-01 1.77E+00 100 100 8.04E-07 7.98E-07 8.00E-07 7.99E-07 7.98E-073.00E+06 5.00E-01 3.10E+00 200 100 8.19E-07 8.06E-07 8.21E-07 8.12E-07 8.06E-07

Inductance (H)

P61 High Frequency Low Loss Material



• P5 – 300KHz ~700KHz• P51 & P52 – 500KHz ~ 1MHz• P52 (high Bs & high freq ferrite)

– for high frequency high current power inductor

Symbol UnitMeasuring Conditions

P5 P51 P52Freq. Flux den. Temp.

Initial Permeability μi 　 10KHz <0.25mT 25oC 2000±25% 1500±25% 2000±25%

Core Loss 　 Pv KW/m3

700kHz 50mT25oC 600 300 410

100oC 550 250 400

1MHz 50mT25oC 600 1000

100oC 600 1000

Saturation Flux Density Bs mT 10kHz H=1200A/m

25oC 470 490 500

100oC 350 400 400

Curie Temperature Tc oC 　　　 ≥220 ≥250 ≥250

Density d g/cm3 　　　 4.70 4.85 4.85




ACME provides ferrite materials in all applications:MnZn High Perm

MnZn high perm and telecommaterials

High μiLow THD

Wide Freq.

Wide Temp.

A10

A121N07

A05

A07

A102

A043A061

N10 A151

A101

DC-Bias

w-T

A062A063

A13



ACME provides ferrite materials in all applications: NiZnEMI/EMC

• K05

• K07

• K08

• K10

• K15

• K20

Low loss

• K081

• K12

HighBs

• B25

• B30

• B40

• B45

• B60

• B90

Wide Temp

• F50

• F51

• F52

Low Permeability

• L1

• L2

• L3

• L4

• L5• L6

NFC/RFID Antenna

• H2

• H3

• H4

• H5

• H5M

• H5R

WPC


NiZn ferrites’ specifications are made in the way like MnZn High Permeability Materials and their applications in EMC and Telecom have overlaps.

A quick comparison of MnZn and NiZn material

　 μi Bmax Bandwidth tanδ/μi (*) ρ

MnZn High Higher Low Higher Very lowNiZn Low Lower High Low Very high



Symbol UnitHigh Permeability Materials

A05 A07 A10 A102 A121 A151Initial Permeability μi 　 5000±25% 7000±25% 10000±30% 10000±30% 12000±30% 15000±30%Realative Loss factor tan δ/μi 10-6

＜ 4 < 8 ＜ 10 ＜ 10 ＜ 10 ＜ 10＜ 15 < 30 ＜ 60 ＜ 60 ＜ 60 <110

Saturation Flux Density Bms mT

440 400 410 380 380 400300 200 210 180 180 170

RemanenceBrms

mT 80 150 140 95 130 220　 90 110 110 75 110 100

Temperature Factor of Permeability αF 10-6/℃ 0~2 -1 ~ 1 0~1.5 -1 ～ 1 0~1.5 -1~1

0~2 -1 ~ 1 -0.5 ～ 1 -1 ～ 1 -0.5~1 -1~1

Hysteresis Material Constant ηB 10-6/mT

＜ 0.8 ＜ 1.2< 0.5 ＜ 1 ＜ 0.5 ＜ 0.5　　

Disaccommodation Factor

DF 10-6＜ 3 ＜ 2 ＜ 2 ＜ 2 ＜ 2 ＜ 2　　

Curie Temperature Tc ℃ 160 160 130 120 110 110

Resistivity ρ Ωm 0.20 0.35 0.15 0.15 0.12 0.10

Density d g/cm3 4.85 4.90 4.90 4.90 4.90 5.00

66



Symbol Unit Telecom High Permeability MaterialsA043 A061 N07 N10

Initial Permeability μi 　 4500±25% 6000±25% 7000±25% 10000±30%　　　 >9000

Realative Loss factor tan δ/μi 10-6 ＜ 10 ＜ 10 ＜ 5 ＜ 10

＜ 10 ＜ 30 ＜ 30 ＜ 90Saturation Flux Density Bms mT 460 460 400 380

300 320 220 160

Remanence Brms mT 65 100 70 16060 80 60 110

Temperature Factor of Permeability

αF 10-6/℃1 ～ 2 1 ～ 3 -1 ~ 1 -1 ～ 0

-1 ～ 1 -1 ～ 1 -1 ～ 1 -1 ~ 1

Hysteresis Material Constant ηB 10-6/mT < 0.5 < 0.5 <0.2 < 0.5

Disaccommodation Factor

DF 10-6 ＜ 2 ＜ 2 <2 ＜ 2

Curie Temperature Tc ℃ 160 160 130 100

Resistivity ρ Ωm 0.20 0.20 0.15 0.12 Density d g/cm3 4.85 4.85 4.90 5.00

67



A13 is the newest high perm material of ACME (Benching TDG TL13)

FEATURES• Improved ui-freq performance (150k~500kHz) for EMI conduction filtering performance.• 9000μi at the Frequency of 200KHz.



A13 is the newest high perm material of ACME (Benching TDG TL13)

FEATURES• Improved ui-freq performance (150k~500kHz) for EMI conduction filtering performance.• 9000μi at the Frequency of 200KHz.



APPLICATIONS‧Wideband transformer‧pulse transformer‧inductor ‧ filter‧T, EE, ET, etc.



Critical in common mode choke design selection



Note that the above tables provide a set of data on “fixed” conditions and all the specifications are highly variant under different conditions. Initial Permeability is a strong function of Temperature

TSMP TSMP

The higher the permeability, the lower the Curie Temperature Tc

Will this ui-temp can cause sever design and application issues? NO! especially true for power application. Only in some niche designs or extreme conditions



Almost temperature independent permeability can be obtained in NiZn by ACME

(ACME is capable of developing custom materials per specific requests)

In ferrite material specifications, everything is obtained by trade-off and compromising.

The trade-off of F50 and F51 is their low Tc, for NiZn,Tc usually > 200℃



FEATURES• Stable permeability (500ui) at the temperature range of -40 ~ 120oC.• Its Curie temperature is more than 140oC.• Lower loss factor characteristics.APPLICATIONS• HF keyless entry antennas for automotive.



N07: Wide temperature low THD material For low THD over wide temperature range (20~85 ) in ℃

outdoor environment; Mainly in EP core for xDSL modem transformer

N07 V.S. A101 EP13L @5kHz

-70

-65

-60

-55

-50

-45

-40

-40 -20 0 20 40 60 80 100 120Temperature(℃)

THD

(dB)

N07A101



N07 and A101 are ideal for the transformers of xDSL modem. Their THD low characteristics are important to signal transfer for high speed network accessing.

Competitive materials TDK DN70 Material



A043~4500μi & A061~6000μi: Dedicated Ethernet LAN pulse transformer materials

A043 for 100Base-T & 100/1000Base-T system and

A061 for 1Giga Base-T system Applicable temperature range -40~85℃ Excellent DC-Bias characteristics for Ethernet POE

requirement For tiny ring cores



Initial Permeability V.S. Field Strength

0

1000

2000

3000

4000

5000

0.00 0.10 0.20 0.30 0.40 0.50

Field Strength (Oe)

μ i25℃

-40℃

85℃

70℃

0℃

Test core ：T3.05*1.5*2.06

Initial Permeability V.S. Field Strength

010002000300040005000600070008000

0 0.1 0.2 0.3 0.4 0.5 0.6Field Strength (Oe)

μi

Test core ：T3.05*1.27*2

25℃

-40℃

70℃0℃

85℃



Innovative LAN Pulse Transformers Material for High Speed Transmission

Pulse TransformerEx: High DC-Bias sustainability 　 N2 、 A043 、 A061

Common Mode ChokeEx: NiZn Ferrite(K08)

Differential Mood ChokeEx: NiZn Ferrite(L1)

10-100 Base 1000 Base

A043 K08A061 K08 L1

Competitive materials Steward #56 Material



N10: Telecom version of A10 Keep ui>9000 over wide temperature range (-

20~85 ), excellent for outdoor application℃ Applied in EE, EP,ring cores, …, for CMC, pulse

transformer, and EMI choke

Initial Permeability V.S. Frequency

10

100

1000

10000

100000

1 10 100 1000 10000

Frequency (KHz)

μ i

Test core ：T13.4*6.7*5.6

Initial Permeability V.S. Temperature

0

5000

10000

15000

20000

25000

30000

-40 -20 0 20 40 60 80 100 120 140

Temperature(℃)Test core ：T13.4*6.7*5.6



Symbol UnitMeasuring Conditions

A062New

A063New

Freq. Flux den. Temp.

InitialPermeability μi 　 10KHz <0.25mT 25oC 6000±2

5%6000±25

%

Saturation Flux Density Bs mT 10kHz H=1200

A/m25oC 460 460100oC 300 280

CurieTemperature Tc oC 　　　 ≥160 ≥150

Density d g/cm3 　　　 4.85 4.85

A062 and A063 are benching and surpassing EPCOS T65 and Ferronics M material, respectively.



A062 High perm ferrite with high Bs Designed as ring core type for ballast driver and CMC

under high current



A063 is developed under a request to replace Ferronics M material for POE and Telecom applications



A063 is developed under a request to replace Ferronics M material for POE and Telecom applications



Applied Frequency

N5 N51

1MHz 100MHz 1GHz

1000

10000

Higher frequency

Ferrite Roadmap for EMI-suppression

Ni-Zn:K08,K10, K15, K20

5000

10MHz

100

High Perm.:A151,A121,A102, A10, A07, A05

High pass bandInitial Permeability



Initial Permeability

Applied Frequency

Telecom filters and chokes:N4, N43

10KHz 1MHz 10MHz

1000

10000

HF

Under Development

Ferrite Roadmap for Telecom

5000

100KHz

Ni-Zn,High Q filters and chokes:L1, L2, L3 L4 L5…

100

High Perm. For xDSL:A101

High Perm. For outdoor xDSL:N07

Wide temperature stability

Pulse X’fmer for LAN: A043, A061

High Bs for Telecom Wideband X’fmer: N42

Low THD Wide temperature range

High Bs



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Documents

Ferrite Specifications and ACME Ferrites (1)