Status
Active: In Production.
Description
The DS3994 is a 4-channel controller for cold-cathode
fluorescent lamps (CCFLs) that backlight liquid crystal
displays (LCDs) in TV and PC monitor applications. The
DS3994's features make it suitable for use in even the
largest LCDs, while its low BOM cost makes it ideal for
the entire range of LCD TVs and monitors.
The DS3994 can stagger the lamp bursts from each of
the four channels. This feature allows scanning backlight
schemes for video quality improvement to be
implemented using a single CCFL controller IC, making
it very simple and inexpensive to provide this enhancement.
In addition, staggering the bursts from each
channel can be used to minimize current ripple on the
display power supply, which is especially important for
larger LCDs. The relative stagger between each of the
channels is programmable, so this feature can be tailored
to the specific application.
The DS3994 uses a push-pull drive architecture but it
can also support full and half bridge drive schemes.
Contact the factory for more details.
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