| Status |
| Part Number |
Status |
| DS3988 |
Active: In production, but some versions are no longer available. See Ordering Information. |
| 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.
|
| Key Features |
|
Applications/Uses |
- 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
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|
|
| Key Specifications: CCFL Controllers |
| Part Number |
Features |
VIN
(V) |
VIN
(V) |
Topology |
Channels |
Dimming Interface |
Freq. |
EV Kit |
Package/Pins |
Smallest Available Pckg.
(mm2) |
Oper. Temp.
(°C) |
Price |
| min |
max |
max w/pins |
See Notes |
| DS3988 |
| All N-FET Drive |
| Lamp Fault Output |
| Master-Slave Function |
| Synchonizable |
| User EEPROM | |
4.5 |
5.5 |
Push-Pull |
8 |
|
Fixed PWM |
No |
|
84.6 |
-40 to +85 |
$2.72 @1k |
| See All CCFL Controllers (17) |
| Diagram |
Typical Operating Circuit |
source：ShenZhen henlito electronic co.,ltd.
web:www.henlito.com
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