宽输入电压8V-450V FP7176

 generaldescription
     the fp7176 is an average current modecontrol led driver ic operating in a constant off-time mode.fp7176does not produce a peak-to-average error,and therefore greatlyimproves accuracy,line and load regulation of the led currentwithout any need for loop compensation or high-side currentsensing.the output led current accuracy is±2%.
       thefp7176 can be powered from an 8.0-450v supply.a pwm dimming inputis provided that accepts an extemal control ttl compatiblesignal.the output current can be programmed by an internal 227mvreference,or controlled extemally through a 0-1.5v dimminginput.
features
fast average currentaontrol
intemal 8 to 450v linearregulator
programmable constant off-timeswitching
linear and pwm dimmingcapability
output short curcuitprotection with skip mode
requires few extemalcomponents for operation
applications
dc/dc or ac/dc led driverapplications
led streetlighting
back lighting of flat paneldisplays 
general purpose constantcurrent source
signage and decorative ledlighting
chargers