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MAX8798AETX+

更新时间： 2024-11-11 13:02:03
品牌 Logo 应用领域
美信 - MAXIM 驱动器调节器开关
页数 文件大小 规格书
30页 594K
描述
Switching Regulator

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中文翻译

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MAX8798AETX+ 技术参数

是否无铅： 不含铅是否Rohs认证： 符合
生命周期：Obsolete包装说明：,
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8542.39.00.01Factory Lead Time：1 week
风险等级：5.73模拟集成电路 - 其他类型：SWITCHING REGULATOR
湿度敏感等级：1峰值回流温度（摄氏度）：NOT SPECIFIED
处于峰值回流温度下的最长时间：NOT SPECIFIEDBase Number Matches：1

MAX8798AETX+ 数据手册

 浏览型号MAX8798AETX+的Datasheet PDF文件第2页浏览型号MAX8798AETX+的Datasheet PDF文件第3页浏览型号MAX8798AETX+的Datasheet PDF文件第4页浏览型号MAX8798AETX+的Datasheet PDF文件第5页浏览型号MAX8798AETX+的Datasheet PDF文件第6页浏览型号MAX8798AETX+的Datasheet PDF文件第7页 
±9-597±; Rev 5; 9/57  
Internal-Switch Boost Regulator with  
Integrated 3-Channel Scan Driver for TFT LCDs  
MAX798  
General Description  
Features  
The MAX8798 includes a high-performance, step-up  
regulator; a high-speed operational amplifier; a digitally  
adjustable VCOM calibration device with nonvolatile  
memory and an I2C interface; and a high-voltage, level-  
shifting scan driver. The device is optimized for thin-film  
transistor (TFT) liquid-crystal display (LCD) applications.  
o 1.8V to 5.5V IN Supply Voltage Range  
o 1.8V to 4.0V V Input Voltage Range  
DD  
o 1.2MHz Current-Mode Step-Up Regulator  
Fast Transient Response  
Built-In 20V, 1.9A, 150mΩ MOSFET  
o High-Speed (20MHz) Operational Amplifier  
The step-up DC-DC converter provides the regulated  
supply voltage for panel source driver ICs. The high  
switching frequency allows the use of ultra-small induc-  
tors and ceramic capacitors. The current-mode control  
architecture provides fast transient response to pulsed  
loads typical of source driver loads. The step-up regu-  
lator features soft-start and current limit.  
150mA Output Current  
o High-Voltage Drivers with Scan Logic  
+35V to -25V Outputs  
Output Charge Sharing  
o Programmable VCOM Calibrator  
7-Bit Adjustable Current-Sink Output  
I2C Interface  
The high-current operational amplifier is designed to  
drive the LCD backplane (VCOM). The amplifier fea-  
tures high output current (±±15mA), fast slew rate  
(41V/µs), wide bandwidth (25MHz), and rail-to-rail  
inputs and outputs.  
EEPROM Setting Memory  
o Thermal-Overload Protection  
Simplified Operating Circuit  
The programmable VCOM calibrator is externally  
attached to the VCOM amplifier’s resistive voltage-divider  
and sinks a programmable current to adjust the VCOM  
output-voltage level. An internal 7-bit digital-to-analog  
converter (DAC) controls the sink current. The DAC is  
ratiometric relative to BOOST and is guaranteed to be  
monotonic over all operating conditions. The calibrator IC  
includes an EEPROM to store the desired VCOM voltage  
level. The 2-wire I2C interface between the LCD panel  
and the programming circuit minimizes panel connector  
pin count and simplifies production equipment.  
VP  
VN  
V
IN  
V
MAIN  
50kΩ  
IN  
SHDN  
LX  
DISH  
PGND  
FB  
1.9A  
STEP-UP  
REG  
1kΩ  
CPV  
OE  
The high-voltage, level-shifting scan driver is designed  
to drive the TFT panel gate drivers. Its three outputs  
swing from +31V (maximum) to -21V (minimum) and  
can swiftly drive capacitive loads. To save power, the  
two complementary outputs are designed to allow  
charge sharing during state changes.  
COMP  
SCAN DRIVER  
LOGIC  
AND  
SYSTEM  
STV  
OECON  
GATE DRIVERS  
AGND  
GON  
GOFF  
STVP  
VN  
VP  
BOOST  
NEG  
CKVCS  
The MAX8798 is available in a 36-pin, thin QFN pack-  
age with a maximum thickness of 5.8mm for ultra-thin  
LCD panels.  
PANEL  
CKVB  
VCOM  
TO VCOM  
BACKPLANE  
CKVBCS  
Applications  
CKV  
VL  
POS  
3.3V  
LINEAR  
REG  
Notebook Computer Displays  
BGND  
V
DD  
LCD Monitor Panels  
OUT  
VCOM CALIBRATOR  
7
GND  
V
IN  
Ordering Information  
SDA  
SCL  
2
I C  
PIN-  
PKG  
SCLS  
WPP  
BUS  
WPN  
SET  
PART  
TEMP RANGE  
PACKAGE  
CODE  
36 Thin QFN  
6mm x 6 mm  
MAX8798ETX+ -45°C to +81°C  
T-3666M-±  
________________________________________________________________ Maxim Integrated Products  
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,  
or visit Maxim’s website at www.maxim-ic.com.  
1234567...30

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