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. Applications * LCD PC Monitors * LCD TVs * 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