TDK Electronics · TDK Europe

Cores with Distributed Air Gaps

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With the new standards for ferrite cores with distributed air gaps, TDK offers an opportunity for downsizing and increasing power density.
In addition, distributed gapped cores (DG cores) allow the possibility to optimize the design of magnetics in terms of efficiency and thermal performance. The internal construction of TDK’s DG cores has a rated temperature of up to 180 °C.
The new standardized DG core program contains E, ETD, and PQ cores in our power materials N87, N95 and N97 and covers an inductance factor range between 60 nH and 400 nH.
All DG cores can be used with our broad portfolio of accessories like coil formers and mounting hardware.
Our ferrite cores with distributed air gaps are used in a wide range of automotive and industrial applications such as EV charging stations, on-board chargers and DC-DC converters, solar inverters, UPS, industrial SMPS as well as telecom and server SMPS.


Features

Distributed Air Gaps

  • Standardized series and accessories  
  • Cost-efficient automated production
  • Size reduction 

Superior Performance

  • Significantly increased power density
  • Improved thermal behavior
  • Optimized cost/performance ratio with 3 gaps

Fringing Flux Reduction

  • Enlarged winding area
  • Larger fill factor
  • Up to 70% loss reduction

DG Cores at a Glance

Main Benefits

  • Significantly increased power density
  • Reduction of losses caused by proximity effect and eddy currents
  • Improved thermal behavior
  • Temperature stability up to 180 °C

Typical Applications

  • LLC transformers and resonance chokes
  • Flyback transformers
  • Storage chokes
  • PFC chokes for active PFCs
    • Boundary Conduction Mode (BCM)
    • Critical Conduction Mode (CrCM)
    • Discontinuous Conduction Mode (DCM)
  • General Power Conversion where a large air gap is needed
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Application Fields

 Solar Inverters
 OBC, DC-DC converters
 UPS
 EV Charging Stations
 Industrial SMPS
 Telecom, Server SMPS

Get Data Sheets and Search

PDF Core shape Individual parts AL value (nH) Material (Core)
E 32/16/9DG Coil former,  Core,  Yoke 60, 120 N87
E 32/16/11DG Coil former,  Core,  Yoke 100, 150 N87
E 42/21/15DG Core 96 - 207 N87
E 42/21/20DG Core 123 - 267 N87
E 47/20/16DG Core 121 - 266 N87
E 55/28/21DG Coil former,  Core 100 - 400 N87
E 55/28/25DG Coil former,  Core 100 - 400 N87
E 65/32/27DG Coil former,  Core 100 - 400 N87
E 70/33/32DG Coil former,  Core 100 - 400 N87
E 80/38/20DG Core 197 - 352 N87
E 100/60/28DG Core 353 - 761 N87
ETD 39/20/13DG Coil former,  Core,  Yoke 100, 150 N87
ETD 49/25/16DG Coil former,  Core,  Yoke 100, 250 N87
ETD 59/31/22DG Coil former,  Core,  Yoke 100 - 400 N87
PQ 32/30DG Coil former,  Core 100, 150 N95
PQ 35/35DG Coil former,  Core 100, 150 N95
PQ 50/50DG Coil former,  Core 100 - 400 N95
PQ 65/60DG Coil former,  Core 100 - 400 N95

In order to download up to 20 files together as zip, please mark them with the check box. To start the download, please click the Download button at the end of the list.

  • Selector guide
  • Index of part numbers
  • Plastic materials for accessories
  • General - definitions
  • Application notes
  • Processing notes
  • Packing
  • Quality and environment
  • Standards and specifications
  • Ferrite polymer composites
  • Symbols and terms
  • Cautions and warnings

In order to download up to 20 files together as zip, please mark them with the check box. To start the download, please click the Download button at the end of the list.


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