FP7171规格书资料

FP7171是一个开环,电流模式下,控制LED驱动IC。FP7171可编程操作在一个恒定的频率或恒定导通模式。它包括一个8.5 - 100v线性调节器,使其从范围广泛的输入工作电压而不需要外部低电压供应。 FP7171包括PWM调光和0 - 250 mv线性调光输入可用于LED电流的线性调光。FP7171适合巴克领导的司机。自从FP7171处于开环电流模式控制,控制器取得了良好的循环输出电流调节,

　　General Description The FP7171 is an open loop， current mode， control LED driver IC. The FP7171 can be programmed to operate in either a constant frequency or constant off-time mode. It includes an 8.5 - 450V linear regulator which allows it to work from a wide range of input voltages without the need for an external low voltage supply. The FP7171 includes a PWM dimming and 0 - 250mV linear dimming input which can be used for linear dimming of the LED current. The FP7171 is ideally suited for buck LED drivers. Since the FP7171 operates in open loop current mode control， the controller achieves good output current regulation without the need for any loop compensation. Features  Switch mode controller for single switch LED drivers  Enhanced drop-in replacement to the FP7171  Open loop peak current controller  Internal 8.5 to 450V linear regulator  Constant frequency or constant off-time operation  Linear and PWM dimming capability  Requires few external components for operation Applications  DC/DC or AC/DC LED driver applications  RGB backlighting LED driver  Back lighting of flat panel displays  General purpose constant current source  Signage and decorative LED lighting  Chargers Typical Application Circuit PWMD VDD LD V