LT3791演示套件是基于芯片LT3791进行演示,最主要运用与照明。Demonstration circuit DC1666A is a synchronous fourswitch buck-boost LED driver controller. It accepts an input voltage from 4.7V to 60V, and drives up to 25V of LEDs at 2A. DC1666A features both PWM and analog dimming of the LED string. It has an OPENLED flag that indicates when the LED string has been removed and it has a SHORTLED flag that indicates that the output has been shorted to GND. In both cases, the IC remains in control and well protected.描述LT?3791 是一款同步、四开关降压-升压型 LED 驱动器控制器。该控制器可以在输入电压高于、低于或等于输出电压的情况下调节电压高达 52V 之 LED 灯串的 LED 电流。恒定频率、强制连续电流模式架构允许对其频率进行调节或在 200kHz 至 700kHz 的范围内实施同步。在降压或升压操作中,无需上管 MOSFET 刷新开关周期。凭借 60V 输入、60V 输出能力以及工作区之间的无缝转换,LT3791 非常适合于汽车、工业、甚至电池供电型系统中的 LED 驱动器应用。LT3791 提供了输入电流监视器、LED 电流监视器、以及 LED 开路或短路故障情况报告功能电路,而在 LED 开路或短路故障期间,LT3791 将执行 “重新起动” 或 “锁断” 操作。特点?