照明用电约占人类总用电的20%以上，是节能的关键。HB-LED因其高光效、长寿命、环保等优点，成为21世纪最具潜力的绿色光源。然而其驱动电源却因效率不高(特别是轻载效率)、寿命较短、驱动方式不佳等问题，成为HB-LED 照明发展的瓶颈。项目在继前期研究的Twin-Bus HB-LED驱动电源之后，首次从能源利用率的角度，提出调光状态下的效率问题，即驱动电源的能源效率，并提出和研究多模式混合控制及最佳脉冲宽度Burst Mode的控制策略；针对传统电解电容消去方法致使驱动电源效率降低、输入电流畸变及HB-LED光输出闪烁的问题，首次提出具有较强低频纹波抑制能力的PI级联准谐振和PI级联准陷波器的新型控制方法。该方法不但降低了传统PI控制对高控制带宽的要求，而且没有任何惩罚；讨论了嵌入谐振模式的高效率PWM变换器拓扑和考虑光衰及结温补偿的HB-LED驱动技术。最后，构建了原理样机和实验验证。

Worldwide, more than 20% of all electric power is consumed by residential, commercial or industrial lighting. Due to the potential of high efficacy, good optical performance, long lifetime, environmental friendliness, and compact size over the conventional lighting devices, high-brightness light-emitting-diodes (HB-LEDs) have emerged as a promising lighting technology to replace the energy inefficiency incandescent lamps and mercury-based fluorescent lamps. However, power supplies for HB-LED lighting application have many drawbacks: low efficiency, short lifetime, and poor lighting quality like flicker, which have become the bottleneck for the development of HB-LED lighting. After following the Twin-Bus HB-LED drivers, the efficiency problem under the entire load rang, specifically the efficiency at light load, is firstly addressed in order to maximize the lighting’s potential of energy saving. Thus, the hybrid-mode control with multiple operation modes and improved burst mode control methods with optimized pulse width are studied in this proposal. On the other hand, to achieve the high reliability, the electrolytic capacitors with short lifetime have to be avoided in the HB-LED power supply. However, the conventional methods for eliminating electrolytic capacitors resulted in distorted input current, reduced efficiency, and poor lighting quality. Therefore, in this proposal, two novel control methods with high rejection capability of double line frequency voltage ripple, Proportional Integral cascaded Qusi-Resonant (PI-QR) and Proportional Integral cascaded Qusi-Notch Filter (PI-QNF) are proposed firstly. The proposed solutions provide significant double line voltage reduction while it has negligible impact on the phase and gain margins of the control loop gain. Compared with its counterpart, it has no additional cost, efficiency, and complexity penalties. Furthermore, the high efficiency PWM converter incorporating resonant conversion mode and the driver approach considering light attenuation compensation and temperature compensation are also discussed in this proposal. Finally, the validity and effectiveness of the proposed solutions are verified by the experiment results from the prototype.