A linear constant current LED driver without off-chip inductor and capacitor

Wu, Xufeng; Leng, Yahui; He, Lenian; Xi, Jianxiong

doi:10.1109/newcas.2015.7181992

Cited by 3 publications

(2 citation statements)

References 11 publications

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“…However, ripple, electromagnetic interference (EMI) and relatively complex control circuit are drawbacks of switching power supply [18,19]. Whereas, in linear mode, power devices usually work in constant current state with the control of feedback signal [20,21,22,23,24]. The advantages of linear current source are small ripple of output current, high accuracy of constant current and simple circuit, etc.…”

Section: Introductionmentioning

confidence: 99%

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Linear current module adaptive to wide operating voltage range based on automatic series/parallel conversion

Wang

Fu³

2020

IEICE Electron. Express

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A new method based on adaptive series/parallel conversion to realize linear current output in a wide operating voltage range is presented in this paper. According to the load state, a switch array is employed to perform adaptive series/parallel conversion control on load segments and corresponding constant current branches to ensure constant current in each load segment and constant power of the total load in wide operating voltage range. The proposed design combines the advantages of switch mode current source and linear constant current source. The correctness and feasibility of the proposed method are verified by experiments of a LED driver.

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Section: Introductionmentioning

confidence: 99%

“…The adaptive conversion of connection of current branches and load branches is controlled by a switch array. LED driver is one of the main applications of constant current source [23,24,26,27,28,29,30,31]. Based on the proposed linear current module, a four-segment LED driver is designed and experimentally verified.…”

Section: Introductionmentioning

confidence: 99%