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Home > Technology List > Flat Coil Planar Transformers deliver 500 W power capability.

Flat Coil Planar Transformers deliver 500 W power capability.

Update Time: 2019-12-20 12:12:48

~ Reduce DCR 50% and increase throughput power 20% ~

Flat coil planar transformer photo available at:

San Diego, Calif. -- Pulse Electronics Corporation (NYSE: PULS), a leading provider of electronic components, launches a series of low-loss, flat coil surface mount planar transformers to deliver high efficiency power to applications with tight height constraints. This technology uses a copper fill factor that is twice that of a PCB so the direct current resistance (DCR) of the primary winding is reduced by 50% and the power rating is increased by 20% to deliver up to 500 watts of power capability. Replacing the traditional multilayer PCB winding with a flat coil winding reduces the price by approximately 20%.

Pulse's new standard series of planar transformers measure 21.6 x 23.4 x 8.6mm up to 26.7 x 29.5 x 11.9mm and are a pin-compatible replacement to existing Pulse multilayer PCB-based planar transformers. By eliminating the cost and time to fabricate PCBs for new winding arrangements, this transformer has the additional advantages of flexibility and speed to prototype for custom variations. Applications include low profile/high efficiency bus converters for distributed power architecture, datacom system cards, industrial controls, and robotics.

"Traditional multilayer PCB windings with up to 8 consecutive winding layers give rise to high leakage inductance, producing unacceptably high voltage spikes and snubber circuit losses," said Gerard Healy, field application engineer, Pulse Electronics Power Division. "Replacing the multilayer PCB with a reduced number of flat coil winding layers connected in series provides immediate benefits by reducing the AC proximity effect on copper losses. In addition, more winding segments and selective coupling between simultaneously conducting windings can be implemented to reduce the leakage inductance. This improved interleaving capability has been demonstrated to increase the PSU efficiency on high power systems by 2%."

Planar magnetics have been primarily implemented as a high power (>100W) low profile (< 12.5mm)="" solution="" for="" medium="" to="" low="" voltage="" conversions,="" such="" as="" the="" intermediate="" bus="" converter="" in="" a="" distributed="" power="" architecture.="" in="" recent="" years,="" the="" move="" to="" discrete="" dc/dc="" power="" modules="" with="" embedded="" designs="" has="" fueled="" strong="" growth="" in="" planar="" opportunities.="" "pulse="" is="" delivering="" more="" cost-effective="" and="" higher="" performance="" solutions="" in="" response="" to="" this,"="" commented="" healy. ="" white="" paper="" pulse="" electronics'="" new="" planar="" series="" consists="" of="" the="" ph08xx="" and="" the="" ph09xx="" platforms,="" which="" are="" pin="" compatible="" with="" pulse's="" legacy="" pa08xx="" and="" pa09xx="" series,="" but="" with="" lower="" dcr.="" for="" further="" technical="" information,="" the="" white="" paper="" "flat="" coil="" planar="" transformers"="" is="" available="" at="">

Pulse's planar transformers are RoHS compliant and meet standard EIA481 requirements. They are available in tape-and-reel packaging. Lead time is eight weeks. The price ranges from $3.00 to $4.50 in quantities of 50,000 pieces. Pricing varies according to order configuration and destination. Contact Pulse directly or visit the website at

About Pulse Electronics:

Pulse Electronics is the electronic components partner that helps customers build the next great product by providing the needed technical solutions. Pulse Electronics has a long operating history of innovation in magnetics, antennas, and connectors, as well as the ability to ramp quickly into high-quality, high-volume production. The Company serves the wireless and wireline communications, power management, military/aerospace, and automotive industries. Pulse Electronics is a participating member of the IEEE, SFF, OIF, HDBaseT Alliance, CommNexus, NFC Forum, MoCA, and IWPC. Visit the Pulse Electronics website at

Copyright ©2013 Pulse Electronics Corporation. All rights reserved. All brand names and trademarks are properties of their respective holders.

Pulse Electronics
Gerard Healy
Field Applications Engineer, Pulse - Europe
Tel: +353 93 70377

A R Marketing Inc. (agency)
Andrea Roberts
Tel: +1 858-451-8666
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