The DS3882 is a dual-channel cold-cathode fluorescent lamp (CCFL) controller for automotive 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
Applications/Uses
Dual-Channel CCFL Controllers for Backlighting LCD Panels and Instrument Clusters in Automotive 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
Notes: **This pricing is BUDGETARY, for comparing similar parts. Prices are in
U.S. dollars and subject to change. Quantity pricing may vary
substantially and international prices may differ due to local
duties, taxes, fees, and exchange rates. For volume-specific prices
and delivery, please see the price and availability page
or contact an authorized distributor.
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