TI LED171596A 96个LED阵列驱动方案
TI公司的LED171596A是用于RGB和白光LED的96个(24x4) LED阵列驱动器,具有单独的通路控制,支持4个低电阻高边开关和24个低边电流沉,每路可提供多达15mA的连续电流,电流匹配度±5%,I2C,SPI和PWM亮度控制模式,具有扩展的保护功能如开路和短路LED故障检测和热关断保护.主要用在控制面板照明和局部地区调光LED背景光驱动器.本文介绍了LED171596A主要特性,功能框图和应用电路,亮度通路图以及评估板LED171596A EVM特性,电路图,材料清单和PCB设计图.
LED171596A 96-LED Matrix Driver for RGB and White LEDs.The LED171596A is a 96 channel matrix LED driverwith independent channel control, designed fordriving locally dimmed displays. The device sports 4low-resistance high side switches and 24 low side current sinks that can deliver up to 15 mA ofcontinuous current per channel. The driver has 9-bitduty cycle and 8-bit current control of each low-sideLED current sink.
Each current sink can be individually controlledthrough the I2C-compatible or SPI interface, but alsohas the capability to be controlled with a single valuethrough the global brightness control register. Thisglobal brightness control also passes through abrightness sloper function to create optically smoothbrightness transitions without the need for multipleregister writes.
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