DS3984 Description
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.
DS3984 Key Features
- High-Density CCFL Controller for LCD TV and PC Monitor Backlights
- Can Be Easily Cascaded to Support More Than 4 Lamps
- Minimal External ponents
- 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
- Can Be Synchronized to External Sources for the Lamp and DPWM Frequencies
- <10% to 100% Dimming Range