[原创] TI TPS92691－Q1多功能LED驱动器解决方案

TI公司的TPS92691-Q1是支持多种降压或升压驱动器拓扑的多功能LED控制器,具有固定频率峰值电流模式控制技术和可编开关频率,斜率补偿和软起动定时器,输入电压4.5V-65V,输出电压2V-65V,低输入失调轨-轨电流检测放大器,LED电流精度优于±3%,主要用在汽车外部照明,建筑物和通用照明.本文介绍了TPS92691-Q1主要特性,功能框图,多种应用电路以及LED驱动器评估板TPS92691EVM-752主要特性,电路图,材料清单和PCB设计图.

The TPS92691-Q1 is a versatile LED controller that can support a range of step-up or step-down driver topologies. The device implements a fixed-frequency peak current mode control technique with programmable switching frequency, slope compensation, and soft-start timing. It incorporates a high voltage (65-V) rail-to-rail current sense amplifier that can directly measure LED current using either a high-side or a low-side series sense resistor. The amplifier is designed to achieve low input offset voltage and attain better than ±3% LED current accuracy over junction temperature range of 25℃ to 140℃ and output common-mode voltage range of 0 to 60 V.
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