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DS3984

更新时间： 2024-11-22 04:15:15
品牌 Logo 应用领域
达拉斯 - DALLAS 控制器
页数 文件大小 规格书
24页 790K
描述
4-Channel Cold-Cathode Fluorescent Lamp Controller

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DS3984 数据手册

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Rev 0; 4/05  
4-Channel Cold-Cathode  
Fluorescent Lamp Controller  
General Description  
Features  
The DS3984 is a 4-channel controller for cold-cathode  
fluorescent lamps (CCFLs) used to backlight liquid  
crystal displays (LCDs) in TV and PC monitor applica-  
tions. The DS3984 supports configurations of 1 to 4  
lamps, and multiple DS3984 controllers can be cascad-  
ed to support applications requiring more than 4 lamps.  
♦ High-Density CCFL Controller for LCD TV and PC  
Monitor Backlights  
♦ Can Be Easily Cascaded to Support More Than  
4 Lamps  
♦ Minimal External Components  
♦ Analog Brightness Control  
Applications  
♦ Per-Channel Lamp Control Ensures Equal  
Brightness Among Lamps and Maximizes Lamp  
Life  
LCD Televisions  
LCD PC Monitors  
Ordering Information  
♦ Gate Driver Phasing Minimizes DC Supply Current  
Surges  
PART  
TEMP RANGE  
-40°C to +85°C  
-40°C to +85°C  
-40°C to +85°C  
-40°C to +85°C  
PꢀN-PACKAGE  
32 TQFP  
♦ Per-Channel Lamp Fault Monitoring for Lamp  
Open, Lamp Overcurrent, Failure to Strike, and  
Overvoltage Conditions  
DS3984T  
DS3984T+  
DS3984Z  
DS3984Z+  
32 TQFP  
28 SO.300  
28 SO.300  
♦ Accurate (±±5% ꢀndependent On-Board Oscillators  
for Lamp Frequency (40kHz to 80kHz% and DPWM  
Burst Dimming Frequency (22.±Hz to 440Hz%  
+Denotes lead-free package.  
♦ Can Be Synchronized to External Sources for the  
Pin Configurations  
Lamp and DPWM Frequencies  
♦ <105 to 1005 Dimming Range  
TOP VIEW  
♦ Programmable Soft-Start Minimizes Audible  
LOSC  
A0  
1
2
3
4
5
6
7
8
9
28 LSYNC  
27 FAULT  
26 SCL  
Transformer Noise  
♦ ꢀ2C-Compatible Serial Port and On-Board  
Nonvolatile (NV% Memory Allow Device  
Customization  
PSYNC  
POSC  
BRIGHT  
SVM  
25 SDA  
24 OVD4  
♦ 8-Byte NV User Memory for Storage of Serial  
Numbers and Date Codes  
23 LCM4  
DS3984  
♦ 4.±V to ±.±V Single-Supply Operation  
♦ -40°C to +8±°C Temperature Range  
GA1  
22 GB4  
21 GA4  
20 OVD3  
19 LCM3  
18 GB3  
17 GA3  
GB1  
LCM1  
♦ 32-Lead TQFP (7mm x 7mm% Package or  
OVD1 10  
GA2 11  
28-Pin SO (300 mils% Package  
GB2 12  
2
2
I C is a trademark of Philips Corp. Purchase of I C compo-  
nents from Maxim Integrated Products, Inc., or one of its subli-  
censed Associated Companies, conveys a license under the  
LCM2 13  
OVD2 14  
16  
V
CC  
15 GND  
2
2
Philips I C Patent Rights to use these components in an I C  
2
system, provided that the system conforms to the I C Standard  
Specification as defined by Philips.  
28-SO-300  
Pin Configurations continued at end of data sheet.  
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...24

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