DS3994

Obsolete

4-Channel Cold-Cathode Fluorescent Lamp Controller

Allows the Implementation of Scanning Backlight Schemes Using Only One CCFL Controller IC

Part Models
2
1ku List Price
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Part Details

  • High-Density CCFL Controller for LCD TV and PC Monitor Backlights
  • Programmable Staggered Start for Burst Dimming on Each Channel
  • Strike Frequency Boost Option
  • Programmable Strike Time
  • Can Be Easily Cascaded
  • Minimal External Components
  • Analog Brightness Control
  • 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 (±2%) On-Board Oscillator Lamp Frequency (20kHz to 80kHz)
  • Wide Range On-Board DPWM Burst-Dimming Oscillator (22.5Hz to 440Hz)
  • Can Be Synchronized to External Sources for the Lamp and DPWM Frequencies
  • < 10% to 100% Dimming Range
  • Soft-Start Minimizes Audible Transformer Noise
  • I²C-Compatible Serial Port and On-Board Nonvolatile (NV) Memory Allow Device Customization
  • 3-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
  • 28-Pin SO (300 mils) Package
DS3994
4-Channel Cold-Cathode Fluorescent Lamp Controller
DS3994: Typical Operating Circuit
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Hardware Ecosystem

Parts Product Life Cycle Description
Product 2
DS3988 8-Channel Cold-Cathode Fluorescent Lamp Controller
DS3984 4-Channel Cold-Cathode Fluorescent Lamp Controller
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