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DS3882E Datasheet(PDF) 1 Page - Maxim Integrated Products |
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DS3882E Datasheet(HTML) 1 Page - Maxim Integrated Products |
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1 / 30 page  General Description 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 dri- ving CCFLs used to backlight instrument clusters. The DS3882 is also appropriate for use in marine and avia- tion applications. The DS3882 features EMI suppression functionality and provides a lamp current overdrive mode for rapid lamp heating in cold weather conditions. The DS3882 sup- ports configurations of 1 or 2 lamps with fully indepen- dent lamp control and minimal external components. Multiple DS3882 controllers can be cascaded to sup- port applications requiring more than 2 lamps. Control of the DS3882, after initial programming setup, can be completely achieved through I2C* software communi- cation. Many DS3882 functions are also pin-controllable if software control is not desired. Applications Automotive LCDs Instrument Clusters Marine and Aviation LCDs Features o Dual-Channel CCFL Controllers for Backlighting LCD Panels and Instrument Clusters in Automotive Navigation/Infotainment Applications o Minimal External Components Required o I2C Interface o Per-Channel Lamp-Fault Monitoring for Lamp- Open, Lamp-Overcurrent, Failure to Strike, and Overvoltage Conditions o Status Register Reports Fault Conditions o Accurate (±5%) Independent On-Board Oscillators for Lamp Frequency (40kHz to 100kHz) and DPWM Burst-Dimming Frequency (22.5Hz to 440Hz) o Lamp and DPWM Frequencies can be Synchronized with External Sources to Reduce Visual LCD Artifacts in Video Applications o Optional Spread-Spectrum Lamp Clock Reduces EMI o Lamp Frequency can be Stepped Up or Down to Move EMI Spurs Out of Band o Lamp Current Overdrive Mode with Automatic Turn-Off Quickly Warms Lamp in Cold Temperatures o Analog and Digital Brightness Control o 300:1 Dimming Range Possible Using the Digital Brightness Control Option o Programmable Soft-Start Minimizes Audible Transformer Noise o On-Board Nonvolatile (NV) Memory Allows Device Customization o 8-Byte NV User Memory for Storage of Serial Numbers and Date Codes o Low-Power Standby Mode o 4.75V to 5.25V Single-Supply Operation o Temperature Range: -40°C to +105°C o 28-Pin TSSOP Package Dual-Channel Automotive CCFL Controller ______________________________________________ Maxim Integrated Products 1 28 27 26 25 24 23 22 1 2 3 4 5 6 7 OVD2 LCM2 GB2 GA2 SCL SDA A0 FAULT TOP VIEW VCC PDN LCO BRIGHT LOSC 21 8 GND PSYNC 20 9 STEP POSC 19 10 N.C. A1 18 11 OVD1 GND_S 17 12 LCM1 SVML 16 13 GB1 SVMH 15 14 GA1 VCC LSYNC TSSOP DS3882 Pin Configuration Rev 0; 3/06 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. +Denotes lead-free package. Ordering Information Typical Operating Circuit appears at end of data sheet. PART TEMP RANGE PIN-PACKAGE DS3882E+ -40°C to +105°C 28 TSSOP (173 mils) DS3882E+T&R -40°C to +105°C 28 TSSOP (173 mils) *Purchase of I2C components from Maxim Integrated Products, Inc., or one of its sublicensed Associated Companies, conveys a license under the Philips I2C Patent Rights to use these components in an I2C system, provided that the system conforms to the I2C Standard Specification as defined by Philips. |
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Similar Description - DS3882E |
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