DS3984
4-Channel Cold-Cathode Fluorescent Lamp Controller
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Part Details
- High-Density CCFL Controller for LCD TV and PC Monitor Backlights
- Can Be Easily Cascaded to Support More Than 4 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
- 32-Lead TQFP (7mm x 7mm) Package or 28-Pin SO (300 mils) Package
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.
Applications
- LCD PC Monitors
- LCD TVs
Documentation
Data Sheet 1
Reliability Data 1
Design Note 3
This is the most up-to-date revision of the Data Sheet.
Hardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Product 1 | ||
| DS3988 | 8-Channel Cold-Cathode Fluorescent Lamp Controller | |
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