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LX6523

Microsemi Corporation
Part Number LX6523
Manufacturer Microsemi Corporation
Description HIGH PERFORMANCE CCFL CONTROLLER
Published May 30, 2014
Detailed Description LX6523 TM ® HIGH PERFORMANCE CCFL CONTROLLER P RODUCTION D ATASHEET KEY FEATURES • Push-Pull Output to Provide Low Cost...
Datasheet PDF File LX6523 PDF File

LX6523
LX6523

Overview
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 hermore a soft start feature provides m ore reliable lamp strike and allows effective control of t he possible i nverter st art up s urge current.
Lamp dimming operation is also well considered to facilitate co nvenient and flexible di mming co ntrol d esign with synchronization capability.
In ad dition, rel iable f ault d etection and pr otection funct ions are faci litated including open lamp, over voltage, short circuit, and over current prot ection.
Furthermore, program mable st riking freq...


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