ADI ADP8860七路智能LED驱动方案

ADI公司的ADP8860是电荷泵带I2C接口的七路智能LED驱动器,具有可编程的背景光LED电荷泵和自动光电管控制.这种组合大大节省了能量.7个可编程驱动器中,6个驱动器的驱动电流30mA,1个驱动器的驱动电流为60mA,可编程最大限流(128级),工作电压从2.5 V 到5.5 V,广泛应用在移动显示器背景光,手机键盘背光,双路RGB背光,LED显示和小型显示器的背光.本文介绍了ADP8860的主要特性,方框图, 典型应用电路, 带键盘光控制的应用电路图以及评估系统中主板与子板的电路图和材料清单(BOM).

Charge Pump, 7-Channel Smart LED Driver with I2C Interface ADP8860

The ADP8860 combines a programmable backlight LED charge pump driver with automatic phototransistor control. This combination allows for significant power savings because it changes the current intensity in office and dark ambient light conditions. By performing this function automatically, it eliminates the need for a processor to monitor the phototransistor.

The light intensity thresholds are fully programmable via the I2C® interface. A second phototransistor input, with dedicated comparators, improves the ambient light detection levels for various user operating conditions.
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