Duty-Ratio-Control-Aided LLC Converter for Current Balancing of Two-Channel LED Driver

Duty-ratio-control-aided LLC converter for current balancing of two-channel light-emitting diode (LED) driver is proposed and analyzed. Conventional current-balancing methods have the limitation on the power density and losses from additional components. With the aid of duty ratio control of an LLC converter, the proposed driver does not require any additional component. The total output current is controlled with the frequency modulation, and the duty ratio control is added to obtain current balancing of each LED channel. The advantage of the proposed method is the high power density and high efficiency. Also, it does not affect design procedure of a conventional LLC converter. The prototype of two-channel LED driver with 400-V input and 150-100-V/0.3- A output for each channel verifies the effectiveness of the proposed driver.
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Issue Date
2017-02
Language
English
Keywords

DESIGN CONSIDERATIONS; CAPACITOR

Citation

IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, v.64, no.2, pp.1178 - 1184

ISSN
0278-0046
DOI
10.1109/TIE.2016.2618338
URI
http://hdl.handle.net/10203/222719
Appears in Collection
EE-Journal Papers(저널논문)
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