Selecting Planar Cores For Your Power Applications

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Planar cores are the best alternative to
conventional ferrite cores when there is a need
for a low-profile magnetic device. Their shape
is suitable for PCB mounting and they have low
losses and high saturation levels. These cores
are commonly integrated with Printed Circuit
Boards (PCBs) used in the power supply
market. In this blog, were going to discuss
Planar cores how they are an appropriate
choice for your power applications. Lets get
started!
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What is the purpose of using Planar Cores?
Planar cores are used to make inductive
components where windings are fabricated with
the help of printed circuit tracks or copper
stampings. Then, they are separated by
insulating sheets or constructed using
multiple-layered circuit boards.
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Characteristics
Their windings are influenced by advanced
computer aided manufacturing technologies. They
have superior thermal features because of a
larger surface-to-volume ratio as compared to
other ferrite cores. They have excellent
modularity, so no additional components are
required. They are available in a variety of
shapes sizes from 10mm to 25mm. The operating
temperature range is between -30C to 105C.
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Advantages of Planar Cores
Low Losses over wide temperature range Excellent
Magnetic Performance Good Heat Dissipation Good
Stability Across Load Conditions Strong
Mechanical Integrity Superior Thermal Features
Low Profile Construction No Bobbin
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Major Types of Planar Cores

• Planar (EI, EE) Cores
• These cores are ideal for manufacturing gapped
  inductors where fringing losses have to be taken
  into consideration. These cores are a little
  more expensive than other cores but have no
  wasted space.
• EIH, EEH Cores
• These cores are produced using optimum grade raw
  material advanced technology. They are also a
  little more expensive than other conventional
  ferrite cores.

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Applications
Planar cores are primarily used for commercial
electronics. Below are some of their common
applications. Power Components -Power
Transformers -Mains Filter Chokes AC/DC
Converter -Stand Alone SMPS -Battery Chargers
(Mobile Phones Computers) DC/DC
Converter -Power Converter Modules -Telecommunicat
ions Network -Mobile Phones (Mains power supply)
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Designing of Planar Cores

• The height of an individual component can be
  decreased by sinking the ferrite core through a
  slot in the motherboard. This is pressed until
  the windings are placed on the motherboard.
• In another technique, hybrid mounting, a part of
  the windings are placed on the motherboard while
  others are joined in a multi- layered circuit
  board. The motherboard should have slots to
  maintain space for the ferrite core.

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Conclusion

• Planar cores have become an important component
  to achieve high efficiency and high power
  density converter amidst the increasing
  frequencies. If you are looking for planar cores
  for your power applications, try our products
  designed produced by skilled experts
  technicians.

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At Cosmo Ferrites, we can even help you select
the best products for your unique requirements.
We manufacture supply planar ferrite cores in
a wide range of sizes for power converter
solutions. Were continuously innovating
extending our range of cores to meet the growing
requirements of o r customers. Contact us to
discuss your requirements.
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