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Sunlord Power Inductor
Wire Wound SMD Power inductorWire Wound SMD Power inductorSWPA SeriesSWPA Series
High PerformanceSpace- and Power-saving
Innovative Low Cost Technology Full Automatic Process
Sunlord Power Inductor
SWPA Series Power Inductor Features
Unique Compact Component Structure
High Performance, Space & Power Savings
Full Automatic Production Technologies
Main Electrical Parameters
Ordering Information
Product Lines
Applications and Cross Reference
Selection Guide
Typical Applications
Cross Reference
Outline
Sunlord Power Inductor
Power Inductor Conception
Inductors/Coils
for power lines
for signal lines
Semiconductor power supply circuits DC-DC switch circuits
Electrical signal Transmission circuits
always called power inductors
UsesApplication
Noise suppression RectificationSmoothing
FilteringResonationImpedance matching
Functions
Sunlord Power Inductor
Unique Compact Component Structure
SWPA Series Structure Conventional Structure
SWPA structure makes the lowest profile power inductor possible , offers an excellent combination of high current , high inductance and low DC resistance!
Sunlord Power Inductor
Conventional: The air gap between magnetic ring and core formed single and big.
Resin
Ferrite Grain
Air Gap
电线 磁芯 磁环
气隙
Wire Ferrite Core Ring Core
Air Cap
Unique Compact Component Structure
SWPA: The air gaps between magnetic powders formed uniform and multiple.
Sunlord Power Inductor
The SWPA series can endure larger DC bias current than sleeve structure due to its multiple air gaps. What’s more, the saturation angle can be tuned by adjusting the percentage of magnetic powder and glue.
Multiple air caps of SWPA Series Single air cap of Sleeve Type
Large Saturation Current
Sunlord Power Inductor
Magnetic-resin shielded construction reduces buzz noise to ultra-low levels
Sleeveless square-core winding makes full use of core space and thickens lead
wire inside inductor to achieve lowest possible DC resistance
Minimizes heat generation and maximizes efficient use of battery power
30% Higher current rating than conventional inductors of equal size, takes up
less PCB real estate
Metallization on Ferrite Core results in excellent shock resistance and damage-
free durability
Closed magnetic circuit design reduces leakage flux and Electro Magnetic
Interference (EMI)
Features
Sunlord Power Inductor
High Performance, Space & Power Savings
Higher Saturation Current than conventional inductors of the same size
SWPA6045S100M VS Conventional Structure 10μH(equal size)
-70%
-60%
-50%
-40%
-30%
-20%
-10%
0%
10%
0 0.5 1 1.5 2 2.5 3 3.5 4Current (A)
△L/
L
SWPA6045S100M Conventional Structure 10μH(equal size)
Sunlord Power Inductor
100
HDD
Process Flow
Sorting and Packing Drying Printing Soldering
DryingGluingWindingMetal electrodes
Sunlord Power Inductor
Full Automatic Production TechnologiesFull Automatic Production Technologies
For the same output, compared with conventional process, SunlordInnovative process saves 80% labor force and 50% manufacture space
Products have higher quality and reliability as automatic process minimizesdifferences among operators
Conventional ProcessSunlord Automatic Process
Sunlord Power Inductor
L: inductance
DCR: DC resistance
DCI1: DC overlap current
DCI2: temperature rise current
SRF: self-resonance frequency
Main Electrical ParametersMain Electrical Parameters
Sunlord Power Inductor
L (inductance):
As for an ideal inductor, the inductance L is changeless. But among the practical measurement process, the value of L can not be gotten directly. In fact, L is calculated by measuring Z, where Z=R+jX. So L is X/ω(X/2πf)in practically. Due to the distributing capacitance, the measuring value of L shows a frequency dependent as follows:
Inductance Tolerrance
The precision of the standard inductance is reflected by the exactitude alphabit ±30%N
±20%M
±15%L
±10%K
Inductance toleranceNumber
1 mH = 10-3 H1 µH = 10-6 H1 nH = 10-9 H
Main Electrical ParametersMain Electrical Parameters
Sunlord Power Inductor
DCR (DC Resistance):
DCR is the direct-current resistance of the lead between the electrodes. In other words, it is the value of U/I when DC volts imposed on the electrodes.
Main Electrical ParametersMain Electrical Parameters
Sunlord Power Inductor
DCI1(Saturation Current) DCI2(Heat Rating Current)
DCI1
30%
Saturation Current Heat Rating Current
The external temperature will increase under continual current. The Heat Rating Current is defined as the current that causes the body temperature rise 40℃ from 20℃ambient.
The inductance will decrease under continual current. The Saturation Current is defined as the current at which the inductance drops by 30%.
DC-current DC-current
Main Electrical ParametersMain Electrical Parameters
Sunlord Power Inductor
Stray capacitance exist between wires and electrodes
SRF (self-resonance frequency):
When the frequency F0 of the AC current reaches a certain value which satisfies the following formula, which means resonance takes place in the inductor, and we call the frequency SRF.
Equivalent Circuit
L:ideal inductance
R:DC-Resistance
Cd:Stray capacitance
Main Electrical ParametersMain Electrical Parameters
Sunlord Power Inductor
SWPASWPA 60456045 SS 100100 MM TT①① ②② ③③ ④④ ⑤⑤ ⑥⑥
②② External Dimension (L/W×H) (mm)
6045 6.0X6.0×4.5
① Type
SWPA Wire Wound SMD Power Inductor
③ Feature Type
S standard product
⑤ Inductance tolerance
M ±20%N ±30%
⑥ packing
T Tape Carrier Package
④ Nominal Inductance
Example Norminal value1R0 1.0uH100 10uH101 100uH
Ordering informationOrdering information
Sunlord Power Inductor
SWPA8040S
SWPA6045SSWPA6028SSWPA6020SSWPA6012S
SWPA4030SSWPA4020S
SWPA4012S
SWPA3015SSWPA3012S
SWPA3010S
SWPA8020S
Smaller and smaller
Thinner and thinner
Product LinesProduct Lines
SWPA5040SSWPA5020S
SWPA252012S
SWPA2016S(Developing)
SWPA4018S
Sunlord Power Inductor
Product LinesProduct Lines
0.64~6.300.82~3308.0*8.0[mm]SWPA80S
0.57~5.900.50~3306.0*6.0[mm]SWPA60S
0.49~4.451.0~1005.0*5.0[mm]SWPA50S
0.17~3.150.82~2204.0*4.0[mm]SWPA40S
0.21~2.10.82~1003.0*3.0[mm]SWPA30S
0.38~2.270.47~222.5*2.0[mm]SWPA252012S
Rated Current(A)
Inductance Range(uH)
Dimensions(L*W)
Series
Property Range Table
Sunlord Power Inductor
Application field
Self-resonant Frequency
Inductance
Rated Current
External Dimension
The following items should be noted when selecting power
inductors in design stage.
Power Inductor Selection GuidePower Inductor Selection Guide
Sunlord Power Inductor
Generally, smaller current is selected to set as rated current to suit the circuit.eg:SWPA6045S100M:
DCI1=3.20 ADCI2=2.45 A --->choose this current
Rated Current
The inductance will drop greatly when the loop current increases more than saturation current, and thus the peak value of current ripple cannot be suppressed due to low inductance, which may cause damage to IC.The body temperature of inductors may rise sharply when the loop current increases more than heat rating current, which may cause the worse reliability of wire insulation material and even destroy inductors.
Power Inductor Selection GuidePower Inductor Selection Guide
Sunlord Power Inductor
The reference of selecting the power inductor size
LCD TV: low voltage and large current 6mm or above dimensionsPortable Products: DC-DC high frequency, low inductance, small and thin 3mm or 2.5mmDigital Camera: small and thin 3mm or bellowNote Book: for CPU, low inductance, ultra large current; for other parts, 6mm or above dimensionsHard Disk: 3mm-8mm are all used
Power Inductor Selection GuidePower Inductor Selection Guide
Sunlord Power Inductor
Saturation Current: The larger saturation current promises, the greaterpower output capability.Inductance: The larger inductance promises, the smaller output ripple is.Frequency: SRF must satisfy the switch frequency characteristics. DC-resistance: The smaller DC resistance is, the smaller the efficiency loss.EMI: Choose shielded inductor to avoid electro-magnetic radiation leakage.PCB Dimension: Choose appropriate size power inductor according to available PCB space.
When used in DC-DC conversion circuit, the followings should be also considered.
Power Inductor Selection GuidePower Inductor Selection Guide
Sunlord Power Inductor
7E SeriesNR SeriesDS\DB\D SeriesSLF\VLF\VLC\VLS SeriesCDRH SeriesSWPA Series
SAGAMITaiyoTOKOTDKSUMIDASUNLORD
Cross Part NumberCross Part Number
Sunlord Power Inductor
ApplicationApplicationSwitch Frequency
100kHz~MHzSwitch Frequency
100kHz~MHz
Switch Frequency
100kHz~MHz
EMI
Connect with other IC
① Function: Smoothing, Energy Storage, Phase extension
② Function: EMI suppression
Radiated noise
300MHz~1GHz
Sunlord Power Inductor
Thank You!