Analog Devices Inc.

Category: Displays

The DS3994 is a 4-channel controller for cold-cathodefluorescent lamps (CCFLs) that backlight liquid crystaldisplays (LCDs) in TV and PC monitor applications. TheDS3994's features make it suitable for use in even thelargest LCDs, while its low BOM cost makes it ideal forthe entire range of LCD TVs and monitors.The DS3994 can stagger the lamp bursts from each ofthe four channels. This feature allows scanning backlightschemes for video quality improvement to beimplemented using a single CCFL controller IC, makingit very simple and inexpensive to provide this enhancement.In addition, staggering the bursts from eachchannel can be used to minimize current ripple on thedisplay power supply, which is especially important forlarger LCDs. The relative stagger between each of thechannels is programmable, so this feature can be tailoredto the specific application.The DS3994 uses a push-pull drive architecture but itcan also support full and half bridge drive schemes.Contact the factory for more details.ApplicationsLCD PC MonitorsLCD-TVs

$6.46