Research on a Combination LED Driver Circuit and Its BPSK Communication Modulation Strategy

doi:10.16628/j.cnki.2095-8188.2023.12.003

Abstract

Abstract:

Based on the combination of boost Boost circuit and improved synchronous rectification buck Cuk circuit, a DC/DC combined LED driver circuit for visible light communication is proposed. The high conversion efficiency is achieved by the boost Boost circuit with lower switching frequency processes most of the power (LED lighting power). The improved synchronous rectification buck Cuk circuit with high switching frequency modulates communication signals to achieve high communication performance. A detailed analysis of the working principle and process of the proposed circuit is conducted. A binary phase shift keying modulation strategy is adopted for the design. Finally, through computer simulation analysis and experiments, the feasibility and effectiveness of the proposed combination circuit and BPSK communication modulation strategy are verified.

Key words: LED driver circuit, visile light communication (VLC), combined Boost with improved synchronous rectification step-down Cuk, BPSK communication modulation, efficiency

CLC Number:

TM46

JING Huafeng, LIN Weiming. Research on a Combination LED Driver Circuit and Its BPSK Communication Modulation Strategy[J]. LOW VOLTAGE APPARATUS, 2023, 0(12): 13-21.

Figures/Tables 12

References 33

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参数名称	参数数值	参数名称	参数数值

输入电压U_i/V	10~20	降压通道开关频率f₂/kHz	200
负载最大平均电流I_o/A	0.25	降压通道输入电感L₂/μH	500
升压通道开关频率f₁/kHz	50	降压通道中间电容C₂/nF	330
升压通道输入端电感L₁/mH	1	降压通道输出电感L₃/μH	500
升压通道输出电容C₁/μF	10	降压通道输出电容C₃/nF	1
升压通道额定输出电压u_o1/V	32	降压通道输出电压平均值U_o2/V	8
升压通道最大功率P_1max/W	8.5	降压通道最大功率P_2max/W	2.5