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能馈式发光二极管(light emitting diode,LED)阵列驱动接口电路克服了原有均流接口电路在输入/输出压差耐受方面较弱的缺陷,其负载范围已能拓展至短路及断路.为了能在全负载范围内都实现高效率,该文提出一种最高效率工作点定位控制方法,使能馈式LED阵列驱动接口电路能自动地找到并最终运行于效率最高或次高的稳定工作状态.单通道样机的实验结果表明:可最高效率工作点定位的能馈式LED阵列驱动接口电路在负载正常的情况下可高概率地实现效率的极大化;在负载故障的情况下可高概率地实现损耗的极小化.“,”Prior to the original current-sharing interface circuits, energy-recycle interface circuits for LED matrix driving can successfully deal with the cases of large voltage differences between input and output. For this reason, their load ranges can extend to the limits of short circuit (SC) and open circuit (OC). In order to achieve high efficiencies all over the load range, a maximum-efficiency operation point locating control method is proposed, which can make an energy-recycle interface circuit for LED matrix driving automatically find a nearly maximum-efficiency state and finally operate at that steady state. The experimental results show that a single-channel prototype of the energy-recycle interface circuit for LED matrix driving under the proposed control could achieve both nearly maximum efficiencies in the normal-load cases and nearly minimum losses in the fault-load cases with high probabilities.