High-efficiency boundary conduction mode tapped-inductor boost LED driver

Author

Jeong-Il Kang ; Jonghee Han ; Sang-Kyoo Han

Author_Institution

R&D Office, Visual Display, Samsung Electron. Co., Ltd., Suwon, South Korea

fYear

2014

fDate

Feb. 26 2014-March 1 2014

Firstpage

261

Lastpage

266

Abstract

A high-efficiency boundary conduction mode (BCM) tapped-inductor boost converter for constant output current applications is proposed. Besides the well-known advantages from the BCM operation such as the significantly relieved diode reverse-recovery and switching loss, the proposed converter shows a switching frequency which is insensitive to the output voltage variations. This makes the proposed converter very attractive in small form factor mobile LED driver applications. The circuit is analyzed in detail, and a design guideline is presented. Experimental results from an LED backlight driver prototype for a 14" notebook computer are also presented.

Keywords

driver circuits; inductors; light emitting diodes; zero current switching; zero voltage switching; BCM operation; LED backlight driver prototype; boundary conduction mode; constant output current; diode reverse-recovery; mobile LED driver; notebook computer; switching loss; tapped-inductor boost LED driver; Light emitting diodes; Magnetic switching; Market research; Stress; Switches; Switching frequency; Topology; LED driver; boundary conduction mode; soft switching; tapped-inductor boost converter;

fLanguage

English

Publisher

ieee

Conference_Titel

Industrial Technology (ICIT), 2014 IEEE International Conference on

Conference_Location

Busan

Type

conf

DOI

10.1109/ICIT.2014.6894877

Filename

6894877