|Table of Contents|

 Digital synchronous rectification driving method forLLC resonant converterL(PDF)

[ISSN:1007-449X/CN:23-1 408/TM]

Issue:
2018年01
Page:
16-22
Research Field:
Publishing date:

Info

Title:
 Digital synchronous rectification driving method forLLC resonant converterL
Author(s):
 Zheng-yu1 LI Jia-chen1 YANG Hua2
 ( 1. College of Electrical Engineering,Zhejiang University,Hangzhou 310027,China;2. China Aerospace Science and Technology Corporation Eighth Institute 811 Place,
Shanghai 201100,China)
Keywords:
 LLC resonant converter digital synchronous rectification drain-source voltage body diodedigital processor
PACS:
TM 46
DOI:
10.15938/j.emc.2018.01.003
Abstract:
 A digital synchronous rectification driving method for LLC resonant converter was proposed.This driving method was based on detection of the drain-source voltage of the synchronous rectifier MOS,and then conduction of the body diode was judged. Through the voltage comparator,the output level wastransferred to the digital processor,
and algorithm captures the turn-on time of the body diode and regu-lates the duty cycle of the driving signal of the synchronous rectifier tube,so that the synchronous rectifi-cation achieves the ideal effect,and the efficiency of the converter is improved. Compared with the tradi-tional synchronous rectification driving method,it has the advantages of simple circuit structure and con-trol algorithm,accurate driving signal,good dynamic performance and so on. In order to verify effective-ness of the proposed method,
a 72 W half bridge LLC resonant converter is used as the prototype,and theefficiency is 97. 5% .

References:

Memo

Memo:
-
Last Update: 2018-06-28