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DS3881E

Description
Single-Channel Automotive CCFL Controller
CategoryPower/power management    The power supply circuit   
File Size495KB,28 Pages
ManufacturerMaxim
Websitehttps://www.maximintegrated.com/en.html
Download Datasheet Parametric Compare View All

DS3881E Overview

Single-Channel Automotive CCFL Controller

DS3881E Parametric

Parameter NameAttribute value
Is it Rohs certified?incompatible
MakerMaxim
package instructionTSSOP, TSSOP24,.25
Reach Compliance Code_compli
JESD-30 codeR-PDSO-G24
Number of terminals24
Maximum operating temperature105 °C
Minimum operating temperature-40 °C
Package body materialPLASTIC/EPOXY
encapsulated codeTSSOP
Encapsulate equivalent codeTSSOP24,.25
Package shapeRECTANGULAR
Package formSMALL OUTLINE, THIN PROFILE, SHRINK PITCH
power supply5 V
Certification statusNot Qualified
Nominal supply voltage (Vsup)5 V
surface mountYES
Temperature levelINDUSTRIAL
Terminal formGULL WING
Terminal pitch0.635 mm
Terminal locationDUAL
Rev 0; 3/06
Single-Channel Automotive CCFL Controller
General Description
The DS3881 is a single-channel cold-cathode fluores-
cent 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
DS3881 is also appropriate for use in marine and avia-
tion applications.
The DS3881 features EMI suppression functionality and
provides a lamp current overdrive mode for rapid lamp
heating in cold weather conditions. The DS3881 sup-
ports a single lamp configuration with fully independent
lamp control and minimal external components.
Multiple DS3881 controllers can be cascaded to sup-
port applications requiring more than one lamp. Control
of the DS3881, after initial programming setup, can be
completely achieved through I
2
C* software communi-
cation. Many DS3881 functions are also pin-controllable
if software control is not desired.
Features
o
Single-Channel CCFL Controller for Backlighting
LCD Panels and Instrument Clusters in
Automotive Navigation/Infotainment Applications
o
Minimal External Components Required
o
I
2
C 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
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 or 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
24-Pin TSSOP Package
DS3881
Applications
Automotive LCDs
Instrument Clusters
Marine and Aviation LCDs
Pin Configuration
TOP VIEW
A0 1
SDA 2
SCL 3
LSYNC 4
LOSC 5
BRIGHT 6
PSYNC 7
POSC 8
A1 9
GND_S 10
SVML 11
SVMH 12
24 FAULT
23 GB1
22 GA1
21 V
CC
DS3881
20 PDN
19 LCO
18 GND
17 STEP
16 N.C.
15 OVD1
14 LCM1
13 V
CC
Ordering Information
PART
DS3881E+
DS3881E+T&R
TEMP RANGE
-40°C to +105°C
-40°C to +105°C
PIN-PACKAGE
24 TSSOP (173 mils)
24 TSSOP (173 mils)
+Denotes
lead-free package.
TSSOP
*Purchase
of I
2
C components from Maxim Integrated Products, Inc., or one of its sublicensed Associated Companies, conveys a
license under the Philips I
2
C Patent Rights to use these components in an I
2
C system, provided that the system conforms to the I
2
C
Standard Specification as defined by Philips.
Typical Operating Circuit appears at end of data sheet.
______________________________________________
Maxim Integrated Products
1
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.

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