A novel current sharing method without the signal line for multi-output LED driver - Details

author：

Ke, Bingyi (Ke, Bingyi.) ^[1] | Lin, Weiming (Lin, Weiming.) ^[2] (Scholars：林维明)

Indexed by：

EI Scopus

Abstract：

Current　imbalance　should　be　avoided　when　LEDs　are　applied　in　parallel.　Conventional　current　sharing　methods　usually　need　a　amount　of　the　signal　lines　for　each　LED　string　which　makes　it　difficult　to　design　the　PCB　and　modularize　the　LED　driver.　This　paper　puts　forward　a　novel　current　sharing　method　and　its　working　principle　is　analyzed　in　this　paper　which　doesn＇t　need　any　signal　line　from　each　LED　string.　Through　this　digital　control　method,　the　output　voltage　can　be　adjusted　to　tightly　follow　the　largest　one　among　all　the　voltages　across　each　LED　string.　Finally　the　performance　of　the　proposed　scheme　is　experimentally　verified　by　a　180-W　prototype　with　a　load　of　five　LED　strings　with　linear-current-regulator.　©　2014　IEEE.

Keyword：

Digital control systems Light emitting diodes Microstrip lines Polychlorinated biphenyls

Community：

[ 1 ] [Ke, Bingyi]College of Electrical Engineering and Automation of Fuzhou University, Fuzhou; 350108, China
[ 2 ] [Lin, Weiming]College of Electrical Engineering and Automation of Fuzhou University, Fuzhou; 350108, China

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