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TDK-Lambda will present a paper on rectifier loss reduction at the fifth IET International Conference on Power Electronics, Machines and Drives (PEMD), due to be held on 19-21 April in Brighton.

The paper, entitled ‘Reduced Synchronous-Rectifier Losses in Off-Line Resonant Converters using the LCC Topology’, includes some recent developments in this field and reports on practical techniques that will enable the production of power supplies that are more efficient than their present-day counterparts.

The paper is scheduled for presentation on the first day of the conference, which will be held at the Thistle Hotel.

The paper was written by Andrew Skinner, chief technology officer at TDK-Lambda UK, and Christopher Bennett, electrical and electronics design engineer at the same company.

Skinner said: ‘Resonant converters are becoming very popular in offline applications where high efficiency is a key consideration, so TDK-Lambda has done a lot of work on optimising efficiency with converters of this type.

‘The results to date are presented in this paper, which looks at the performance improvements we’ve been able to achieve using an LCC topology with full-bridge synchronous rectification, compared to TDK-Lambda’s patented NV topology, which is an LLCC technology.

‘The paper also presents a novel low-cost scheme for driving synchronous rectifiers more efficiently,’ he added.

TDK-Lambda is a subsidiary of the TDK Corporation, a leading global electronics company (

TDK-Lambda has been a major provider of power supplies for over 60 years.  The company designs and manufactures a wide range of AC-DC Power Supplies and DC-DC Converters for Industrial, Medical, Telecom, Datacom, and Test & Measurement applications worldwide.

With production facilities in Asia, America and EMEA, TDK-Lambda has positioned itself as one of the world’s largest manufacturers of power conversion products with recognized leadership in the
industrial market segment.

With our comprehensive 1.5W to 90kW range of AC/DC power supplies, DC/DC converters, Programmable DC power supplies and EMI noise filters, TDK-Lambda offers the right solution for a wide spectrum of applications.

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