Chip Power Wirewound Inductors

SMD Shielded Inductors

1(TPSTP) - High Current Power Inductors
Token (TPSTP) High Current Power Inductors Provide Optimum Performance and Efficiency in Real Estate-saving Sizes. Token Electronics has added those new generation portable products in new ranges of high-current chip inductors, TPSTP2110, TPSTP2112, TPSTP2114, and TPSTP2816, for use in DC-DC converter applications.
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2(TPSPC) - Large Current Power Inductors
Get High Efficiency and Low Core Loss Inductor Solutions in Token (TPSPC) series. Token Electronics has added those new generation portable products in new ranges of low-profile wirewound chip inductors, TPSPC1055, TPSPC1060, TPSPC1260, and TPSPC2111, for use in TV, VCR,Switching power sources, NC machines applications.
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3(TPSME) - Shielded Miniature Low Profile Power Inductors
Token (TPSME) Miniature Low Profile Power Inductor for new generation portable products. Token Electronics has added new ranges of low-profile wire wound chip inductors, TPSME201610, TPSME252010, TPSME252012,TPSME3010, TPSME3012, TPSME3015, TPSME4012, TPSME4018, TPSME4030, TPSME5020, TPSME6045, and TPSME8040, for use in DC-DC converter applications.
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4(TPSPA) - Low-Profile High-Current Power Inductors
Token's (TPSPA) inductor features high current and low direct current resistance (DCR) in a rugged surface-mount package. Available in six industry-standard footprint (4.2 mm x 4.4 mm), (5.2 mm x 5.4 mm), (6.6 mm x 7.15 mm), (10.1 mm x 11.15 mm), (12.6 mm x 13.65 mm), and (17.15 mm x 17.15 mm) with a profile from 1.2 mm to 7.0 mm maximum.
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5(TPSDC) - Low Profile Low DCR Power Inductors
To meet the electrical demands of next-generation products such as microprocessors, high-current dc/dc converters and telecom equipment, the (TPSDC) SMD Inductors from Token Electronic targets applications that require wide range inductance, lower DCR and high current.
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6(TRCM) Wire Wound SMD Inductors
Token's new (TPSDS) power inductor series has improved and combined three key factors of low direct current resistance (DCR), high-current, and low-profile in one package. This consists of the internal wound coil being packed tightly with magnetic iron powder and a shielded case that helps the inductor to produce a much lower audible noise.
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7(TPSRB) - EMI High-Saturation Power Inductors
Token Integrated E-Shield for Reduction of EMI In The Compact Case Size. The compact inductors save valuable board space, measuring only 5.6 mm x 6.2 mm x 3.2 mm for TPSRB63, 7.0 mm x 7.8 mm x 4.5 mm for TPSRB74, 9.0 mm x 10.0 mm x 5.5 mm for TPSRB105.
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8(TPSRH) - Large Current Power Inductors
Token (TPSRH) shielded large current inductor family series expand power applications. Token enhances chip power inductor (TPSRH) family series covering complete footprint with profile from 3.0 mm to 10.8 mm, inductance from 1.00 μH to 1000.00 μH, low DCR 0.008Ω to 21.6Ω, and Rated Current up to 10.0A.
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9(TPSLF) - Low DCR High Saturation Power Inductors
Token offers high saturation power inductor 0.01Ω low DCR value and has once again extended its (TPSLF) family of low-profile, wire wound, high-current inductors with a new device that offers the lowest direct current resistance (DCR) available in a compact (5.9mm x 5.9mm), (6.9mm x 6.9mm), (10.1mm x 10.1mm), (12.5mm x 12.5mm) package with a low 2.7mm, 3.0mm, 3.2mm, 3.4mm, 4.8mm, 5.8mm, 6.8mm, and 7.8mm height profile.
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10(TPSDBL) - Backlight High Voltage Inductors
Token SMD high voltage inductors with high breakdown voltage for back light applications. Magnetically Shielded Construction to avoid radiation, Token (TPSDBL) features high breakdown voltage, and very low direct current resistance (DCR). The height only 2.92 mm, they have a footprint of (6.6 x 4.45 mm). Token (TPSDBL) low profile series is specified for backlight applications, such as PDA, USB, LCD, and TFT.
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11(TPSH) - Low DCR Low-Profile Power Inductors
Token's Low DCR Low-Profile Power Inductors fit into to more protable applications. The miniaturization of battery-powered devices also requires more compact circuit-board designs, and therefore smaller but more-effective inductor designs. Token (TPSH) offers an inductance range from 1.0 μH to 1000.0 μH, and DCR from 0.009Ω to 19.110Ω,.
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12(TPSTX) - SMD Compact Power Toroidal Inductors
Token SMD Compact Power Toroidal Inductors are bursting with energy. These low cost surface-mount toroidal inductors meanwhile are designed for use in switching AC/DC power supplies and DC/DC converters. The (TPSTX) series offer low DC resistance and is available with current ratings up to 7.9 A IDC and inductance values that range from 0.49 uH to 1201.70 uH.
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SMD Unshielded Inductors

1(TPUME) - SMD High Frequency Power Inductors
High frequency design, outstanding Q values, superior SRF, all packaged in Token (TPUME) Inductors. Token Electronics has added new ranges of low-profile wire wound chip inductors, TPUME1206, TPUME1210L, TPUME1210, TPUME1812, and TPUME2220, for use in wireless communication equipments to increase flexibility of maximum height measurements with extended electrical characteristics.
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2(TPUD) - Low-Profile Wirewound Power Inductors
SMD unshielded wire-wound power inductors compact low profile to 0.8 mm. Utilize open Magnetic circuit construction and advance winding technology in manufacturing low profile (TPUD) series. The maximum height of TPUD4006/4008 is only 0.8/1.0 mm, TPUD4011/4013 1.2/1.45 mm, and TPUD5011/5013 1.2/1.5 mm.
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3(TPUA) - Miniature Power Wirewound Inductors
Token has extended range of SMD miniature power wirewound inductors with new SMD series. The (TPU31A) series of wirewound SMD inductor comes with low profile at 1.6±0.3 mm maximum and available in 2.2 μH to 27 μH denominations. The series features low DC resistance, down to 0.09 Ω, and high rated current; up to 1.8 A is supported.
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4(TPUDF) - Power Wirewound Inductors
Token (TPUDF) unshielded Power inductor serves as a high-performing, space-saving and power-saving solution. The TPUDF series features wide inductance range from 1.00 μH to 1000.00 μH. The TPU5022DF version has an insertion height of 7.11 mm with low DC resistance down to 0.009 Ohm. Available inductance values for the new TPU5022DF are from 1.00 uH to 1000.00 uH with rated current up to 20.00 A.
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5(TPUDHP) - High Current Power Inductors
Token's Power Inductors utilize wire wound technology enabling up to 30A high current. TPU5022DHP's self-leaded and open magnetic circuit construction is specified for high current applications with up to 30.00 A IDC. Inductance range from 0.78 µH to 15.00 µH.
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6(TPULF) - SMD Unshielded Power Inductors
With a footprint of 7.4 x 7.4 mm, the (TPULF7032) version has an insertion height of 3.5 mm. Available inductance values for the new (TPULF7032) are from 1.00 uH to 100.00 uH with rated current up to 2.88A. With inductance values from 1.00 uH to 1000.00 uH, the (TPULF7045) has a rated current up to 2.8A. Thanks to its temperature stability, it can be used in ambient temperatures ranging from -40°C ~ +85°C.
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Selecting The Optimum Inductor Technology to Best Match The Performance Requirements

How to Select the Right Inductor for DC-DC Converter

Current Rating
Current through a DC-DC converter inductor is always changing throughout the switching cycle and may change from cycle to cycle depending on converter operation, including temporary transients or spikes due to abrupt load or line changes. This peak-to-average ratio makes specification of current ratio difficult.

If one takes the highest possible instantaneous peak current as "current rating" for an inductor, the inductor is likely to be spoiled for the application. If one takes the average current as "current rating", the inductor may not perform well when passing the peak current.

The way to solve this problem is to look for an inductor that has two current rating factors.

  • The first factor is Isat which to deal with possible core saturation from the peak current.
  • The second factor is Irms which to deal with possible heating that can occur due to the average current.

L (Inductance)
In most design procedures, inductance is the first and main parameter to be calculated the desired circuit function. Inductance is calculated to reduce output current ripple and to provide a certain minimum amount of energy storage (or volt-microsecond capacity).

Using much greater or much less inductance may force the converter to change between continuous and discontinuous modes of operation. Using less than the calculated inductance causes increased AC ripple on the DC output. Most DC-DC converter applications do not require extremely tight tolerance of inductance which ±20% is suitable for most converter applications.

DCR (DC Resistance)
DCR is simply a measure of the characteristic wire used in the inductor and is based strictly on the wire diameter and length. Normally this is specified as a “max” in the catalog but can also be specified as a nominal with a tolerance. Typically to reduce the DCR means having to use larger wire and probably a larger overall size. So optimizing the DCR selection means a trade-off of power efficiency, component size and allowable voltage drop across the component.

SRF (Self Resonant Frequency)
The frequency at which the winding self capacitance resonates with the inductance. For most converters, it is best to operate the inductors at frequencies well below the SRF. This is usually shown in the inductor data as a "typical" value.

Isat (Saturation Current)
The amount of current flowing through an inductor that causes the inductance to drop due to core saturation.

Irms (RMS Current)
In physical meaning, the RMS (Root-Mean-Square) is offten called the effective value or DC-equivalent value of a current is an equivalent of a DC current, which has the same heat dissipation as the real current on any resistor. Irms is the amount of continuous current flowing through an inductor that causes the maximum allowable temperature rise. In this case the data sheets almost always provide a rating based on application of DC or low frequency AC current.


It can be seen that inductors for dc-dc converters can be described by a small number of parameters. However each rating may be thought of as a "5th element" based on one set of operating conditions which may need to be augmented to completely describe expected performance in application conditions.

PDF Catalogue

Download Power Inductor Application Notes in PDF file.

General Information of Chip Power Inductors

How to Quickly Search Inductor for all of the Characteristics?

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Searching and comparing data sheets of inductor manufacturers can be time consuming.
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Download Power Wirewound Surface Mount Inductor Catalogue in PDF file.

Leading-Edge Technology

Token Electronics brand passive component specializes in standard and custom solutions offering the latest in state-of-the-art low profile high power density inductor components.

Token provides cost-effective, comprehensive solutions that meet the evolving needs of technology-driven markets. In working closely with the industry leaders in chipset and core development, we remain at the forefront of innovation and new technology to deliver the optimal mix of packaging, high efficiency and unbeatable reliability.

Our designs utilize high frequency, low core loss materials, new and custom core shapes in combination with innovative construction and packaging to provide designers with the highest performance parts available on the market.

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PDF Catalogue

Download Power Inductor General Information in PDF file.