Linear LT3796 100V LED控制方案
Linear公司的LT3796用来驱动LED的可调整恒流或恒压的DC/DC控制器,3000:1 True Color PWM™调光,输入电压从6V到100V,电流监测高达100V,可调开关频率100kHz到1MHz,双电流检测放大器,可编线性电流检测阈值,短路保护,主要用在大功率LED和高压LED,电池和超级电容充电以及精密的限流电压稳压器.本文介绍了LT3796主要特性,方框图,多种应用电路以及100V评估板DC1706A主要特性,电路图,材料清单和PCB元件布局图.
The LT3796 is a DC/DC controller designed to regulate a constant-current or constant-voltage and is ideal for driving LEDs. It drives a low side external N-channel power MOSFET from an internal regulated 7.7V supply. The fixed frequency and current mode architecture result in stable operation over a wide range of supply and output voltages.
Two ground referred voltage FB pins serve as the input for several LED protection features, and also allow the converter to operate as a constant-voltage source.
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