LX6523

LX6523 TM ® HIGH PERFORMANCE CCFL CONTROLLER P RODUCTION D ATASHEET KEY FEATURES Push-Pull Output to Provide Low Cost Solution for Multiple Topology Configuration 0.6A Peak Source and Sink Drive Current 6V to 27V Power Rail operation (36V Absolute Maximum) On Chip Regulator with Under Voltage Lock Out Protection Soft Start Control Programmable Strike Time, Fault Time, Strike Frequency, and Burst Dimming Frequency Burst Dimming Brightness Control Provide Optimized Solution for Off PFC Inverter Applications APPLICATIONS ƒ LCD-TV ƒ Multi-Lamp LCD Monitors ƒ CCFL, EEFL, FFL Backlight Systems DESCRIPTION The LX6523 is a high perform ance CCFL controller optimized for LCD-TV and o ther m ulti-lamp LCD d isplay systems. It particularly provides a cost competitive so lution for o ff-PFC inverter applications. The con troller prov ides a pair of push-pull PWM driv e sig nals wit h adequate cap acity to d rive a p ush-pull, half b ridge, or f ull bri dge C CFL inverter co nfiguration with the add ition of simple external circuitry. An on-chip r egulator s upplies bot h the operating voltage for the output gate drive and bias to the inte rnal control circuitry. This allo ws a d irect connection of th e co ntroller to th e system supply extending the voltage up to 27V without external regulators. The lam p cu rrent regu lation circu it comprises a sim ple and robust cont rol loop design with good regulation accuracy a nd dynam ic response at transient conditions. Furt...