參數(shù)資料
型號(hào)： DS3994
廠商： Maxim Integrated Products, Inc.
英文描述： 4-Channel Cold-Cathode Fluorescent Lamp Controller
中文描述： 4通道冷陰極熒光燈控制器
文件頁數(shù)： 1/28頁
文件大?。?/td> 557K
代理商： DS3994
General Description
The DS3994 is a 4-channel controller for cold-cathode
fluorescent lamps (CCFLs) that backlight liquid crystal
displays (LCDs) in TV and PC monitor applications. The
DS3994’s features make it suitable for use in even the
largest LCDs, while its low BOM cost makes it ideal for
the entire range of LCD TVs and monitors.
The DS3994 can stagger the lamp bursts from each of
the four channels. This feature allows scanning back-
light schemes for video quality improvement to be
implemented using a single CCFL controller IC, making
it very simple and inexpensive to provide this enhance-
ment. In addition, staggering the bursts from each
channel can be used to minimize current ripple on the
display power supply, which is especially important for
larger LCDs. The relative stagger between each of the
channels is programmable, so this feature can be tai-
lored to the specific application.
The DS3994 uses a push-pull drive architecture but it
can also support full and half bridge drive schemes.
Contact the factory for more details.
Applications
LCD Televisions
LCD PC Monitors
Features
o
High-Density CCFL Controller for LCD TV and
PC Monitor Backlights
o
Programmable Staggered Start for Burst Dimming
on Each Channel
o
Strike Frequency Boost Option
o
Programmable Strike Time
o
Can Be Easily Cascaded
o
Minimal External Components
o
Analog Brightness Control
o
Gate Driver Phasing Minimizes DC Supply Current
Surges
o
Per-Channel Lamp Fault Monitoring for Lamp
Open, Lamp Overcurrent, Failure to Strike, and
Overvoltage Conditions
o
Accurate (±2%) On-Board Oscillator Lamp
Frequency (20kHz to 80kHz)
o
Wide Range On-Board DPWM Burst-Dimming
Oscillator (22.5Hz to 440Hz)
o
Can Be Synchronized to External Sources for the
Lamp and DPWM Frequencies
o
< 10% to 100% Dimming Range
o
Soft-Start Minimizes Audible Transformer Noise
o
I
2
C-Compatible Serial Port and On-Board
Nonvolatile (NV) Memory Allow Device
Customization
o
3-Byte NV User Memory for Storage of Serial
Numbers and Date Codes
o
4.5V to 5.5V Single-Supply Operation
o
-40°C to +85°C Temperature Range
o
28-Pin SO (300 mils) Package
D
4-Channel Cold-Cathode
Fluorescent Lamp Controller
______________________________________________
Maxim Integrated Products
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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LSYNC
FAULT
SCL
SDA
OVD4
LCM4
GND
GB4
GA4
OVD3
LCM3
GB3
GA3
V
CC
OVD2
LCM2
GB2
GA2
OVD1
LCM1
GB1
GA1
SVM
BRIGHT
POSC
PSYNC
A0
LOSC
SO-300
TOP VIEW
DS3994
Pin Configurations
Rev 0; 10/06
Ordering Information
Typical Operating Circuits appear at end of data sheet.
PART
TEMP RANGE
-40
°
C to +85
°
C
PIN-PACKAGE
28 SO-300
DS3994Z+
+
Denotes lead-free package.
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參數(shù)描述
DS3994Z+ 功能描述:顯示驅(qū)動(dòng)器和控制器 4-Ch CCFL Controller RoHS:否 制造商:Panasonic Electronic Components 工作電源電壓:2.7 V to 5.5 V 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Reel
DS3994Z+T&R 制造商:Maxim Integrated Products 功能描述:2ND GEN 4CH CCFL CON SOIC-28 T&R LF - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC CCFL CNTRLR 4CH 28-SOIC
DS3994Z+T&R 功能描述:顯示驅(qū)動(dòng)器和控制器 4-Ch CCFL Controller RoHS:否 制造商:Panasonic Electronic Components 工作電源電壓:2.7 V to 5.5 V 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Reel
DS3994Z+W 功能描述:顯示驅(qū)動(dòng)器和控制器 4-Ch CCFL Controller RoHS:否 制造商:Panasonic Electronic Components 工作電源電壓:2.7 V to 5.5 V 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Reel
DS3CC 制造商:Thomas & Betts 功能描述:30A,MG,CUP CAP
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