By Topic

Light load efficiency enhancement of a LLC resonant converter

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$33 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

4 Author(s)
Jifeng Qin ; Intersil Corporation, 1001 Murphy Ranch Road Milpitas, CA, 95035 ; Zaki Moussaoui ; Jun Liu ; Greg Miller

Zero Voltage Switching (ZVS) technique minimizes the turn-on loss of the MOSFETs in LLC resonant converter structure. However, as switching frequency increases, the converter efficiency will suffer due to the increased turn-off loss and gate charge loss, and these effects are especially problematic at light load conditions, where the switching frequency has to be further increased in order to regulate the output. A new hysteretic control scheme is proposed in this paper. By fixing the switching frequency equal to the resonant frequency all the time and skipping pulses proportional to the load condition, the switching losses are reduced and the light load efficiency is improved. The experimental results prove the functionality of the proposed hysteretic control scheme.

Published in:

Applied Power Electronics Conference and Exposition (APEC), 2011 Twenty-Sixth Annual IEEE

Date of Conference:

6-11 March 2011