ISSI IS31FL3740 3x4点阵LED驱动解决方案
ISSI公司的IS31FL3740是具有1/2周期的通用的3x4点阵LED驱动器,可通过I2C兼容接口进行编程,每个LED可单独通过8位x8 PWM数据进行调光,具有线性调光1024步.器件具有3个自动呼吸模式,标识为ABM-1, ABM-2和ABM-3,每个自动呼吸模式有四个计时特性和三个回路特性,而每个LED可单独配置成自动呼吸模式或多或非自动呼吸模式.器件工作电压2.7V-5.5V,工作温度-40℃ 到+125℃,主要用在手机和其它手持设备LED显示,游戏设备和白色家电的LED应用.本文介绍了IS31FL3740主要特性,框图,典型应用电路,以及评估板主要特性,电路图,材料清单和PCB设计图.
The IS31FL3740 is a general purpose 3×4 LEDsmatrix driver with 1/12 cycle rate. The device can beprogrammed via an I2C compatible interface. EachLED can be dimmed individually with 8-bit × 8 PWMdata which allowing 1024 steps of linear dimming.
IS31FL3740 features 3 Auto Breathing Modes whichare noted as ABM-1, ABM-2 and ABM-3. For eachAuto Breathing Mode, there are 4 timing characterswhich include current rising/holding/falling/off timeand 3 loop characters which include Loop-Beginning/Loop-Ending/Loop-Times. Every LED can beconfigured to be any Auto Breathing Mode or No-Breathing Mode individually.
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