An Independently Controlled Two Output Half Bridge Resonant LED Driver

• Published in: Electric power components and systems Vol. 52; no. 7; pp. 1094 - 1114
• Main Authors: Rao, Kambhampati Venkata Govardhan, Kiran Kumar, Malligunta, Srikanth Goud, B.
• Format: Journal Article
• Language: English
• Published: Philadelphia Taylor & Francis 20-04-2024; Taylor & Francis Ltd
• Subjects: Dimming; dimming control; Electric bridges; Electric converters; Electric mains; Inductors; LEDs; Light emitting diodes; Mathematical models; resonant converters; Topology; zero voltage switching
• ISSN: 1532-5008; 1532-5016
• DOI: 10.1080/15325008.2023.2238695

In this research work, an independently controlled two output half-bridge resonant LED driver is proposed. Half bridge series converters will be providing power to two LED lamps. The devices in half-bridge converter are switched at zero voltage using LC resonant circuit. Therefore, switching transition power losses are minimized which increases the LED driver efficiency. Each LED lamp's ripple current is decreased by adding an inductor in series with it, eliminating the need for an electrolytic capacitor and extending the life of the resonant LED driver. Both regulating and dimming operations use asymmetrical duty cycle (ADC) control. Numerical simulations are conducted to examine the suggested resonant converter topology's steady state performance as it sources LED applications. Using the OrCAD/PSPICE tool for universal AC mains, 25 W and 29 W LED driver analysis, design, modeling, and simulation are carried out. The proposed driver needs to provide high efficiency even at reduced illumination.