Adaptive Peak Average Current Control LED Driver for Automotive Lighting

P. Horský, J. Plojhar, Jiri Daniel
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引用次数: 1

Abstract

This letter describes a new average current control dc–dc LED driver suitable for automotive pixel (matrix) lighting. Current is sensed only on an integrated high side switch and peak current is controlled to achieve required average output current independent of tolerances of components and parameters other than the current sensing itself. Fast reaction to output voltage changes required by the pixel light operation is achieved by using a constant ripple control with an off time inversely proportional to the output voltage.
用于汽车照明的自适应峰值平均电流控制LED驱动器
本文介绍了一种适用于汽车像素(矩阵)照明的新型平均电流控制dc-dc LED驱动器。电流仅在集成的高侧开关上检测,峰值电流被控制以达到所需的平均输出电流,而不依赖于电流传感本身以外的组件和参数的公差。通过使用与输出电压成反比的关断时间的恒定纹波控制,实现了对像素光操作所需的输出电压变化的快速反应。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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