Low‐current ripple LED driver by two‐phase driving approach | Zendy

Wong Chi Shing | Zendy; Lai Yuk Ming | Zendy; Loo Ka Hong | Zendy; Tse Chi K. | Zendy

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Low‐current ripple LED driver by two‐phase driving approach

Author(s) -

Wong Chi Shing,

Lai Yuk Ming,

Loo Ka Hong,

Tse Chi K.

Publication year - 2015

Publication title -

electronics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.375

H-Index - 146

ISSN - 1350-911X

DOI - 10.1049/el.2015.1479

Subject(s) - ripple , current (fluid) , phase (matter) , electrical engineering , computer science , automotive engineering , engineering , electronic engineering , physics , voltage , quantum mechanics

A two‐phase driving approach for light‐emitting diode (LED) power supply is proposed. The approach uses two rectangular current sources working complementarily to supply a constant current to the LED string so that the output current can contain very low ripple even without the use of any electrolytic capacitor in the driver circuit. A dual asymmetrical half‐bridge converter with power factor correction is used to realise the approach. A 60 W prototype is built and tested to validate the idea.

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