一种具有恒输出电流和恒亮度控制的LED驱动电路

INTELEC 06 - Twenty-Eighth International Telecommunications Energy Conference Pub Date : 2006-12-04 DOI:10.1109/INTLEC.2006.251597

M. Nishikawa, Y. Ishizuka, H. Matsuo, K. Shigematsu

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引用次数: 61

摘要

单个LED非常小，其亮度与驱动电流的大小有关。足够的照明需要许多LED连接在一起，并为每个LED提供恒定的电流。因此，LED驱动电路必须具有恒定输出电流控制和/或恒定亮度控制。我们提出了一种LED驱动电路，该电路由具有恒输出电流控制和恒亮度控制的升压型DC-DC转换器组成。该电路是由脉宽调制(PWM)控制的开关稳压器型电路。电源和恒流控制都可以由一个系统提供，不需要任何镇流器电阻或辅助电流控制电路

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An LED Drive Circuit with Constant-Output-Current Control and Constant-Luminance Control

A single LED is very small, and their luminance is related to the amount of driving current. Sufficient luminance for an illuminator requires many LEDs to be connected together and a constant current supplied to each LED. Therefore, the LED drive circuit must have constant-output-current control and/or constant-luminance control. We propose an LED drive circuit that consists of a boost-type DC-DC converter with constant-output-current control and constant-luminance control. This circuit is a switching regulator-type circuit controlled by pulse width modulation (PWM). Both the power and the constant-current control can be provided by a single system, without any ballast resistor or auxiliary current control circuit

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INTELEC 06 - Twenty-Eighth International Telecommunications Energy Conference

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