Highly extendable multi‑channel LED driver with leakage energy recycling

Xianghong Kong; Junfeng Liu; Jun Zeng

Highly extendable multi‑channel LED driver with leakage energy recycling

Xianghong Kong

Junfeng Liu

Jun Zeng

Vol. 22, No. 7, pp. 1073-1084, Jul. 2022

10.1007/s43236-022-00417-x

Current sharing

Power factor correction (PFC)

Multi-channel

Leakage inductor energy

Abstract

This paper presents a single-stage single-switch multi-channel LED driver with high extendibility. The PFC module adopts a buck–boost circuit, which can achieve a high-power factor when it works in the discontinuous current mode (DCM). At the same time, the leakage inductor energy can be recycled by adding a capacitor at the primary side to reduce the voltage spike and ringing of the switch. The DC–DC module adopts a forward converter that plays the role of electrical isolation. Using capacitor charge balance, the converter can achieve output current balancing of all the channels. This converter can extend the number of output channels while using fewer capacitors than traditional LED drivers based on capacitor charge balance. In addition, the PFC module is integrated with the DC–DC module while sharing a common switch, which makes the control simple. This paper provides the concrete structure, working principle, and circuit characteristic analysis of the proposed topology. Finally, a 100 W prototype was built to verify its feasibility.

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Cite this article

[IEEE Style]

X. Kong, J. Liu, J. Zeng, "Highly extendable multi‑channel LED driver with leakage energy recycling," Journal of Power Electronics, vol. 22, no. 7, pp. 1073-1084, 2022. DOI: 10.1007/s43236-022-00417-x.

[ACM Style]

Xianghong Kong, Junfeng Liu, and Jun Zeng. 2022. Highly extendable multi‑channel LED driver with leakage energy recycling. Journal of Power Electronics, 22, 7, (2022), 1073-1084. DOI: 10.1007/s43236-022-00417-x.