The DS3984 is a 4-channel controller for cold-cathode
fluorescent lamps (CCFLs) used to backlight liquid
crystal displays (LCDs) in TV and PC monitor applications.
The DS3984 supports configurations of 1 to 4
lamps, and multiple DS3984 controllers can be cascaded
to support applications requiring more than 4 lamps.
Key Features
Applications/Uses
High-Density CCFL Controller for LCD TV and PC Monitor Backlights
Can Be Easily Cascaded to Support More Than 4 Lamps
Minimal External Components
Analog Brightness Control
Per-Channel Lamp Control Ensures Equal Brightness Among Lamps and Maximizes Lamp Life
Gate Driver Phasing Minimizes DC Supply Current Surges
Per-Channel Lamp Fault Monitoring for Lamp Open, Lamp Overcurrent, Failure to Strike, and Overvoltage Conditions
Accurate (±5%) Independent On-Board Oscillators for Lamp Frequency (40kHz to 80kHz) and DPWM Burst Dimming Frequency (22.5Hz to 440Hz)
Can Be Synchronized to External Sources for the Lamp and DPWM Frequencies
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