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http://dx.doi.org/10.5370/KIEE.2010.59.8.1394

A Study on the Effectiveness of Ultra-FRFET for the HV-BLU System in LCD TVs  

Lee, Sang-Taek (한양대학교 전자전기제어계측공학과)
Yeon, Jae-Eul (페어차일드 코리아 HV PCIA)
Cho, Kyu-Min (유한대학 정보통신학과)
Kim, Hee-Jun (한양대학교 전자.컴퓨터공학부)
Publication Information
The Transactions of The Korean Institute of Electrical Engineers / v.59, no.8, 2010 , pp. 1394-1400 More about this Journal
Abstract
This paper introduces a newly improved Ultra-FRFET that has much better reverse recovery characteristic than that of the typical MOSFET and presents its effectiveness in the HV-BLU system of LCD TVs. The reverse recovery time, $T_{rr}$ of Ultra-FRFET is shorter than 40nsec and the peak value of reverse current, $i_{rr}$ is also much smaller compared to the typical MOSFET's, which are sufficient to prevent the MOSFET’s failures without additional FRDs and diodes in HV-BLU system with a half-bridge resonant inverter topology worked by PWM method. In order to verify the validity, the loss analysis and the implementation results in cases when both the conventional solution using typical MOSFETs with additional FRDs and a new solution using Ultra-FRFETs are applied to a HV-BLU of 40" LCD TV are presented. As a result, the effectiveness of Ultra-FRFET was verified and the results are presented in this paper.
Keywords
LLC Converter; Resonant; Ultra-FRFET; HV-BLU Converter; LCD TV; Loss analysis;
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