TI TPS92692高精度峰值电流模式LED驱动方案
TI公司的TPS92692和TPS92692-Q1是基于高精度峰值电流模式LED控制器,可配置成降压/升压模式,输入电压4.5V-65V,在–40°C 到 150°C结温下LED电流精度优于± 4%,采用扩频调制以改善EMI,调光范围1000:1,主要用在汽车外部照明,驱动器监视系统(DMS),LED通用照明,安全出口标记和应急照明.本文介绍了TPS92692主要特性,功能框图以及应用电路,评估板TPS92692EVM-880主要特性和连接图,升压配置电指标,电路图,材料清单和PCB装配图与设计图.
The TPS92692 and TPS92692-Q1 are high accuracypeak current mode based controllers designed tosupport step-up/down LED driver topologies. Thedevice incorporates a rail-to-rail current amplifier tomeasure LED current and spread spectrum frequencymodulation technique for improved EMI performance.
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