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參數資料
| 型號： | MAX749ESA |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 穩壓器 |
| 英文描述： | Digitally Adjustable LCD Bias Supply |
| 中文描述： | SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | 0.150 INCH, SOP-8 |
| 文件頁數： | 1/12頁 |
| 文件大小： | 105K |
| 代理商： | MAX749ESA |
Digitally Adjustable LCD Bias S upply
_______________General Desc ription
The MAX749 generates negative LCD-bias contrast
voltages from 2V to 6V inputs. Full-scale output voltage
can be scaled to -100V or greater, and is digitally
adjustable in 64 equal steps by an internal digital-to-
analog converter (DAC). Only seven small surface-
mount components are required to build a complete
supply. The output voltage can also be adjusted using
a PWM signal or a potentiometer.
A unique current-limited control scheme reduces supply
current and maximizes efficiency, while a high switching
frequency (up to 500kHz) minimizes the size of external
components. Quiescent current is only 60μA max and is
reduced to under 15μA in shutdown mode. While shut
down, the MAX749 retains the voltage set point, simpli-
fying software control. The MAX749 drives either an
external P-channel MOSFET or a PNP transistor.
________________________Applic ations
Notebook Computers
Laptop Computers
Palmtop Computers
Personal Digital Assistants
Communicating Computers
Portable Data-Collection Terminals
____________________________Features
o
+2.0V to +6.0V Input Voltage Range
o
Flexible Control of Output Voltage:
Digital Control
Potentiometer Adjustment
PWM Control
o
Output Voltage Range Set by One Resistor
o
Low, 60μA Max Quiescent Current
o
15μA Max Shutdown Mode
o
Small Size – 8-Pin SO and Plastic DIP Packages
M
_______________________________________________________________ Maxim Integrated Products
Call toll free 1-800-998-8800 for free samples or literature.
1
1
2
3
4
8
7
6
5
CS
DHI
DLOW
GND
FB
CTRL
ADJ
V+
DIP/SO
TOP VIEW
MAX749
__________________Pin Configuration
V+
ADJ
CTRL
FB
CS
DHI
DLOW
GND
V
IN
+5V
-V
OUT
R
SENSE
C
COMP
ON/OFF
DIGITAL
ADJUST
R
FB
1
0.1
μ
F
2
3
4
5
6
7
8
MAX749
__________Typic al Operating Circ uit
19-0143; Rev 1; 2/95
EVALUATION KIT MANUAL
PART
TEMP. RANGE
PIN-PACKAGE
MAX749CPA
0°C to +70°C
8 Plastic DIP
MAX749CSA
0°C to +70°C
8 SO
MAX749EPA
-40°C to +85°C
8 Plastic DIP
MAX749ESA
-40°C to +85°C
8 SO
MAX749C/D
0°C to +70°C
Dice*
______________Ordering Information
*Contact factory for dice specifications.
FOLLOWS DATA SHEET
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相關代理商/技術參數 |
參數描述 |
|---|---|
| MAX749ESA+ | 功能描述:其他電源管理 Digitally Adjustable LCD Bias Supply RoHS:否 制造商:Texas Instruments 輸出電壓范圍: 輸出電流:4 mA 輸入電壓范圍:3 V to 3.6 V 輸入電流: 功率耗散: 工作溫度范圍:- 40 C to + 110 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-48 封裝:Reel |
| MAX749ESA+ | 制造商:Maxim Integrated Products 功能描述:IC LCD BIAS SUPPLY 8-SOIC 制造商:Maxim Integrated Products 功能描述:IC, LCD BIAS SUPPLY, 8-SOIC |
| MAX749ESA+T | 功能描述:顯示驅動器和控制器 Digitally Adjustable LCD Bias Supply 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: 安裝風格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Reel |
| MAX749ESA-T | 功能描述:顯示驅動器和控制器 Digitally Adjustable LCD Bias Supply 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: 安裝風格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Reel |
| MAX749ESA-TG074 | 制造商:Maxim Integrated Products 功能描述:DIGITALLY ADJUSTABLE LCD BIAS SUPPLY - Rail/Tube |
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