Discrete time domain modeling and design of current mode controlled flyback LED driver

被引：1
|
作者：
Kim, Marn-Go [1 ]
机构：
[1] Pukyong Natl Univ, Sch Elect Engn, Busan, South Korea
来源：
SCIENTIFIC REPORTS | 2023年 / 13卷 / 01期
关键词：
PERFORMANCE EVALUATION; ORIENTED ANALYSIS; FEEDBACK-CONTROL; BUCK; CONVERTER;
D O I：
10.1038/s41598-023-33162-7
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
In this paper, modeling for a current mode controlled (CMC) flyback LED driver with a stabilizing ramp is performed in a step-by-step procedure. Discrete time state equations for the system are derived and linearized with respect to a steady-state operating point. At this operating point, the switching control law, the condition that determines the duty ratio, is also linearized. In the next step, a closed-loop system model is derived by combining the two models of the flyback driver and the switching control law. The root locus analysis in the z-plane is used to investigate the characteristics of the combined linearized system and obtain design guidelines for feedback loops. The feasibility of the proposed design is confirmed through the experimental results for the CMC flyback LED driver.
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页数：12
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