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DS3881ET

更新时间： 2024-11-18 04:15:15
品牌 Logo 应用领域
美信 - MAXIM 控制器
页数 文件大小 规格书
28页 489K
描述
Single-Channel Automotive CCFL Controller

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DS3881ET 数据手册

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Rev 0; 3/06  
Single-Channel Automotive CCFL Controller  
General Description  
Features  
ꢀ Single-Channel CCFL Controller for Backlighting  
LCD Panels and Instrument Clusters in  
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.  
Automotive Navigation/Infotainment Applications  
ꢀ Minimal External Components Required  
2
ꢀ I C Interface  
ꢀ Per-Channel Lamp-Fault Monitoring for Lamp-  
Open, Lamp-Overcurrent, Failure to Strike, and  
Overvoltage Conditions  
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  
ꢀ Status Register Reports Fault Conditions  
ꢀ Accurate (±±5% Independent On-Board Oscillators  
for Lamp Frequency (40kHz to 100kHz% and DPWM  
Burst-Dimming Frequency (22.±Hz to 440Hz%  
ꢀ Lamp and DPWM Frequencies can be  
Synchronized with External Sources to Reduce  
Visual LCD Artifacts in Video Applications  
ꢀ Spread-Spectrum Lamp Clock Reduces EMI  
2
completely achieved through I C* software communi-  
cation. Many DS3881 functions are also pin-controllable  
if software control is not desired.  
ꢀ 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  
Applications  
Automotive LCDs  
Instrument Clusters  
ꢀ Analog or Digital Brightness Control  
Marine and Aviation LCDs  
ꢀ 300:1 Dimming Range Possible Using the Digital  
Brightness Control Option  
Pin Configuration  
ꢀ Programmable Soft-Start Minimizes Audible  
Transformer Noise  
TOP VIEW  
ꢀ On-Board Nonvolatile (NV% Memory Allows Device  
1
2
3
4
5
6
7
8
9
24 FAULT  
23 GB1  
A0  
SDA  
Customization  
ꢀ 8-Byte NV User Memory for Storage of Serial  
Numbers and Date Codes  
22  
21  
20  
19  
18  
17  
16  
15  
14  
13  
SCL  
GA1  
ꢀ Low-Power Standby Mode  
LSYNC  
LOSC  
BRIGHT  
PSYNC  
POSC  
A1  
V
CC  
ꢀ 4.7±V to ±.2±V Single-Supply Operation  
ꢀ Temperature Range: -40°C to +10±°C  
ꢀ 24-Pin TSSOP Package  
PDN  
DS3881  
LCO  
GND  
STEP  
N.C.  
Ordering Information  
PART  
TEMP RANGE  
-40°C to +105°C  
-40°C to +105°C  
PIN-PACKAGE  
GND_S 10  
SVML 11  
SVMH 12  
OVD1  
LCM1  
DS3881E+  
24 TSSOP (173 mils)  
24 TSSOP (173 mils)  
DS3881E+T&R  
V
CC  
+Denotes lead-free package.  
TSSOP  
2
*Purchase of I C components from Maxim Integrated Products, Inc., or one of its sublicensed Associated Companies, conveys a  
2
2
2
license under the Philips I C Patent Rights to use these components in an I C system, provided that the system conforms to the I 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.  
1234567...28

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