DS3988

· High-Density CCFL Controller for LCD TV and PC Monitor Backlights
· Can Be Easily Cascaded to Support More Than 8 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
· <10% to 100% Dimming Range
· Programmable Soft-Start Minimizes Audible Transformer Noise
· I²C-Compatible Serial Port and On-Board Nonvolatile (NV) Memory Allow Device Customization
· 8-Byte NV User Memory for Storage of Serial Numbers and Date Codes
· 4.5V to 5.5V Single-Supply Operation
· -40°C to +85°C Temperature Range
· 48-Lead TQFP (7mm x 7mm) Package

The DS3988 is an 8-channel controller for cold-cathode fluorescent lamps (CCFLs) used to backlight liquid crystal displays (LCDs) in TV and PC monitor applications. The DS3988 supports configurations of 1 to 8 lamps, and multiple DS3988 controllers can be cascaded to support applications requiring more than 8 lamps.