A high PF, high efficiency LED driver without off-chip inductor and capacitor

A high power factor (PF), high efficiency light-emitting diode (LED) driver without off-chip inductor and capacitor is presented in this paper. The proposed driver consists of one resistor, one diode bridge and one controller integrated circuits (IC). The controller IC employs four LED strings and s...

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Bibliographic Details
Published in:Analog integrated circuits and signal processing 2016-01, Vol.86 (1), p.51-57
Main Authors: Wu, Xufeng, Sun, Kexu, Leng, Yahui, He, Lenian, Xi, Jianxiong
Format: Article
Language:English
Subjects:
Capacitors
Circuits and Systems
Controllers
Electric potential
Electrical Engineering
Engineering
Inductors
Integrated circuits
Light-emitting diodes
Resistors
Signal,Image and Speech Processing
Voltage
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Summary:A high power factor (PF), high efficiency light-emitting diode (LED) driver without off-chip inductor and capacitor is presented in this paper. The proposed driver consists of one resistor, one diode bridge and one controller integrated circuits (IC). The controller IC employs four LED strings and sequences their conduction to shape the output current in proportion to the input voltage. The controller IC was designed and implemented by using HHNEC 1 μm 700 V process. The experimental results show that high PF of 97.93 % and efficiency of 90.41 % under the input voltage of 220 V|rms utility voltage were obtained.
ISSN:0925-1030
1573-1979
DOI:10.1007/s10470-015-0647-3