A novel power feeding circuit for LED buck driver

Author

Tse-Ju Liao ; Chern-Lin Chen

Author_Institution

Grad. Inst. of Electron. Eng., Nat. Taiwan Univ., Taipei, Taiwan

fYear

2013

fDate

3-6 Nov. 2013

Firstpage

288

Lastpage

292

Abstract

This paper provides a novel power feeding circuit. The circuit comprises two power MOSFETs. One can sustain line voltage, the other is built in chip with 40 V process. The new power feeding route is from the source node of high voltage power MOSFET through a regulator which is built inside the chip to charge a VCC capacitor. The proposed circuit turns power consumption of conventional startup resistor to LED lighting energy. Also, some switching loss in conventional LED buck driver can be reused as chip energy. Under the same operation current of control IC and output voltage is 40 V, the proposed circuit saves 26% under 156 V line voltage, and 12.5 % under 326 V voltage.

Keywords

capacitors; driver circuits; light emitting diodes; power MOSFET; resistors; LED buck driver; LED lighting energy; VCC capacitor; chip energy; control IC; high voltage power MOSFET; line voltage; power consumption; power feeding circuit; regulator; startup resistor; switching loss; voltage 156 V; voltage 326 V; voltage 40 V; RNA; Switches; Switching loss; Buck converter; Light emitting diode;

fLanguage

English

Publisher

ieee

Conference_Titel

Future Energy Electronics Conference (IFEEC), 2013 1st International

Conference_Location

Tainan

Print_ISBN

978-1-4799-0071-8

Type

conf

DOI

10.1109/IFEEC.2013.6687518

Filename

6687518