宽输入电压8V-450V FP7176

 General Description
     The FP7176 is an average current mode control LED driver IC operating in a constant off-time mode.FP7176 does not produce a peak-to-average error,and therefore greatly improves accuracy,line and load regulation of the LED current without any need for loop compensation or high-side current sensing.The output LED current accuracy is±2%.
       The FP7176 can be powered from an 8.0-450V supply.A PWM dimming input is provided that accepts an extemal control TTL compatible signal.The output current can be programmed by an internal 227mV reference,or controlled extemally through a 0-1.5V dimming input.


Features
Fast average current aontrol
Intemal 8 to 450V linear regulator
Programmable constant off-time switching
Linear and PWM dimming capability
Output short curcuit protection with skip mode
Requires few extemal components for operation


Applications
DC/DC or AC/DC LED driver applications
LED street lighting
Back lighting of flat panel displays 
General purpose constant current source
Signage and decorative LED lighting
Chargers