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首页> 外文会议>IEEE Joint Conference: International Conference on IC Design and Technology amp; Solid State Systems Symposium >On-chip accurate primary-side output current estimator for flyback LED driver control
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On-chip accurate primary-side output current estimator for flyback LED driver control

机译：片上精确的初级侧输出电流估算器，用于反激式LED驱动器控制

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摘要

A flyback control circuit with a primary side output current estimator is designed on chip and analyzed in this investigation. The flyback control circuit plays a key role of lighting systems, where the LED current estimator and the diode conduction period detector are proposed for the accuracy of LED driver control. The LED current estimator generates a voltage proportional to the LED current. The diode conduction period detector is in charge of estimating correct conducting period to prevent misjudgment of the cycle period. Detailed analysis, including prediction voltage of the LED current and period of the diode, is reported. The post-layout simulations of the proposed current estimator demonstrate the maximum error ≤ 3.08 %, and the efficiency is 89.45 %.
机译：具有一次侧输出电流估计器的反激控制电路在芯片上设计，并在本研究中进行了分析。反激控制电路在照明系统中起着关键作用，其中提出了LED电流估计器和二极管导通周期检测器以提高LED驱动器控制的精度。 LED电流估算器产生与LED电流成比例的电压。二极管导通周期检测器负责估计正确的导通周期，以防止误判周期。报告了详细的分析，包括LED电流的预测电压和二极管的周期。提出的电流估计器的布局后仿真显示最大误差≤3.08％，效率为89.45％。

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