DS3988 8-Channel Cold-Cathode Fluorescent Lamp Controller

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Status Part Number Status DS3988 Active: In Production. See Ordering Information for details. Description 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.

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Key Features 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   Applications/Uses LCD PC Monitors LCD TVs

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[ 2005-10-13 ]

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Rev 0; 2006-02-27
This page last modified: 2010-05-21