DocumentCode :
42038
Title :
Adaptive Continuous Current Source Drivers for 1-MHz Boost PFC Converters
Author :
Zhang, Zhiliang ; Xu, Pengcheng ; Liu, Yan-Fei
Author_Institution :
Jiangsu Key Lab. of New Energy Generation & Power Conversion, Nanjing Univ. of Aeronaut. & Astronaut., Nanjing, China
Volume :
28
Issue :
5
fYear :
2013
fDate :
May-13
Firstpage :
2457
Lastpage :
2467
Abstract :
Recently, current source drivers (CSDs) have been proposed to reduce the switching loss and gate drive loss in megahertz (MHz) dc-dc converters, in which the duty cycle normally has a steady-state value. However, different from dc-dc converters, the duty cycle of the power factor correction (PFC) converters is modulated fast and has a wide operation range during a half-line period in ac-dc applications. In this paper, an adaptive full-bridge CSD is proposed for the boost PFC converters. The proposed CSD can build adaptive drive current inherently depending on the drain current of the main power MOSFET. Compared to the CSDs with the constant drive current, the advantage of the adaptive drive current is able to reduce the switching loss further when the MOSFET is with a higher switching current, while minimize the drive circuit loss when the MOSFET is with a lower switching current. Therefore, the adaptive CSD is able to realize better design tradeoff between the switching loss and drive circuit loss so that the efficiency can be optimized in a wide operation range. Furthermore, no additional auxiliary circuit and control are needed to realize the adaptive current by the proposed CSD. The experimental results verified the functionality and advantages. For a 1-MHz/300-W boost PFC converter, the proposed CSD improves the efficiency from 89% using a conventional voltage driver to 92.2% (an improvement of 3.2%) with 110 Vac input, 380 V output, and full-load condition.
Keywords :
DC-DC power convertors; driver circuits; power MOSFET; power factor correction; ac-dc applications; adaptive continuous current source drivers; adaptive drive current; adaptive full-bridge CSD; auxiliary circuit; boost PFC converters; constant drive current; drain current; drive circuit loss minimization; efficiency 89 percent to 92.2 percent; frequency 1 MHz; gate drive loss reduction; half-line period; megahertz dc-dc converters; power 300 W; power MOSFET; power factor correction converters; switching loss reduction; voltage 110 V; voltage 380 V; Capacitors; Inductors; Logic gates; Power MOSFET; Switches; Switching loss; Boost converter; current source driver (CSD); megahertz (MHz) switching frequency; power MOSFET; power factor correction (PFC);
fLanguage :
English
Journal_Title :
Power Electronics, IEEE Transactions on
Publisher :
ieee
ISSN :
0885-8993
Type :
jour
DOI :
10.1109/TPEL.2012.2218619
Filename :
6301731
Link To Document :
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