DS3882：Dual-Channel CCFL Controller _ BDTIC a Leading Distributor in China

DS3882：Dual-Channel CCFL Controller

Low Component Count, Feature-Rich, Automotive Inverter Solution

The DS3882 is a dual-channel cold-cathode fluorescent lamp (CCFL) controller for applications that provides up to 300:1 dimming. It is ideal for driving CCFLs used to backlight liquid crystal displays (LCDs) in navigation and infotainment applications and for driving CCFLs used to backlight instrument clusters. The DS3882 is also appropriate for use in marine and aviation applications. The DS3882 features EMI suppression functionality and provides a lamp current overdrive mode for rapid lamp heating in cold weather conditions. The DS3882 supports configurations of 1 or 2 lamps with fully independent lamp control and minimal external components. Multiple DS3882 controllers can be cascaded to support applications requiring more than 2 lamps. Control of the DS3882, after initial programming setup, can be completely achieved through I²C software communication. Many DS3882 functions are also pin-controllable if software control is not desired.

Key Features

Dual-Channel CCFL Controllers for Backlighting LCD Panels and Instrument Clusters in Navigation/Infotainment Applications
Minimal External Components Required
I²C Interface
Per-Channel Lamp-Fault Monitoring for Lamp-Open, Lamp-Overcurrent, Failure to Strike, and Overvoltage Conditions
Status Register Reports Fault Conditions
Accurate (±5%) Independent On-Board Oscillators for Lamp Frequency (40kHz to 100kHz) and DPWM Burst-Dimming Frequency (22.5Hz to 440Hz)
Lamp and DPWM Frequencies can be Synchronized with External Sources to Reduce Visual LCD Artifacts in Video Applications
Optional Spread-Spectrum Lamp Clock Reduces EMI
Lamp Frequency can be Stepped Up or Down to Move EMI Spurs Out of Band
Lamp Current Overdrive Mode with Automatic Turn-Off Quickly Warms Lamp in Cold Temperatures
Analog and Digital Brightness Control
300:1 Dimming Range Possible Using the Digital Brightness Control Option
Programmable Soft-Start Minimizes Audible Transformer Noise
On-Board Nonvolatile (NV) Memory Allows Device Customization
8-Byte NV User Memory for Storage of Serial Numbers and Date Codes
Low-Power Standby Mode
4.75V to 5.25V Single-Supply Operation
Temperature Range: -40°C to +105°C
28-Pin TSSOP Package

DS3882: Typical Operating Circuit

Applications/Uses

Instrument Clusters
Marine and Aviation LCDs

DataSheet

title	Download file
DS3882 Data Sheet	DS3882.pdf

Parametrics

Part Number	V_IN (V)	V_IN (V)	Topology	Channels	Dimming Interface	Freq.	Package/Pins	Oper. Temp. (°C)
Part Number	min	max	Topology	Channels	Dimming Interface	Freq.	Package/Pins	Oper. Temp. (°C)
DS3882	4.75	5.25	Push-Pull	2	Analog DPWM I2C SMBus	Fixed PWM	See Data Sheet	-40 to +105

Quality and Environmental Data

DS3882.pdf