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MAX1995EGI

更新时间： 2024-10-03 21:55:47
品牌 Logo 应用领域
美信 - MAXIM 控制器
页数 文件大小 规格书
31页 1141K
描述
High-Efficiency, Wide Brightness Range, CCFL Backlight Controllers

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MAX1995EGI 技术参数

是否Rohs认证： 不符合生命周期：Obsolete
零件包装代码：QFN包装说明：5 X 5 MM, 0.90 MM HEIGHT, QFN-28
针数：28Reach Compliance Code：not_compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.65模拟集成电路 - 其他类型：FLUORESCENT LIGHT CONTROLLER
控制模式：VOLTAGE-MODE控制技术：PULSE WIDTH MODULATION
最大输入电压：28 V最小输入电压：4.6 V
标称输入电压：12 VJESD-30 代码：S-PQCC-N28
JESD-609代码：e0长度：5 mm
湿度敏感等级：1功能数量：1
端子数量：28最高工作温度：85 °C
最低工作温度：-40 °C最大输出电流：1 A
封装主体材料：PLASTIC/EPOXY封装代码：VQCCN
封装等效代码：LCC28,.2SQ,20封装形状：SQUARE
封装形式：CHIP CARRIER, VERY THIN PROFILE峰值回流温度（摄氏度）：245
电源：5 V认证状态：Not Qualified
座面最大高度：1 mm子类别：Switching Regulator or Controllers
标称供电电压 (Vsup)：5 V表面贴装：YES
切换器配置：SINGLE最大切换频率：300 kHz
温度等级：INDUSTRIAL端子面层：Tin/Lead (Sn85Pb15)
端子形式：NO LEAD端子节距：0.5 mm
端子位置：QUAD处于峰值回流温度下的最长时间：NOT SPECIFIED
宽度：5 mmBase Number Matches：1

MAX1995EGI 数据手册

 浏览型号MAX1995EGI的Datasheet PDF文件第2页浏览型号MAX1995EGI的Datasheet PDF文件第3页浏览型号MAX1995EGI的Datasheet PDF文件第4页浏览型号MAX1995EGI的Datasheet PDF文件第5页浏览型号MAX1995EGI的Datasheet PDF文件第6页浏览型号MAX1995EGI的Datasheet PDF文件第7页 
19-2157; Rev 1; 10/02  
High-Efficiency, Wide Brightness  
Range, CCFL Backlight Controllers  
General Description  
Features  
The MAX1895/MAX1995 integrated controllers are opti-  
mized to drive cold-cathode fluorescent lamps (CCFL)  
using a synchronized full-bridge inverter architecture.  
Synchronized drive provides near sinusoidal wave-  
forms over the entire input range to maximize the life of  
CCFLs. The controllers also operate over a wide input  
voltage range with high efficiency and broad dimming  
range.  
o Synchronized-to-Resonant Frequency  
Good Crest Factor for Longer Lamp Life  
Ensures Maximum Strike Capability  
o High Power to Light Efficiency  
o Wide Dimming Range (3 Methods)  
Lamp Current Adjust: >3 to 1  
Digital PWM (DPWM): >10 to 1  
Combined: >30 to 1  
The MAX1895/MAX1995 include safety features that  
limit the transformer secondary voltage and protect  
against single-point fault conditions including lamp-out  
and short-circuit faults.  
o Feed-Forward for Fast Response to Step Change  
of Input Voltage  
o Wide Input Voltage Range (4.6V to 28V)  
The MAX1895/MAX1995 regulate the CCFL brightness  
in three ways: linearly controlling the lamp current, digi-  
tal pulse-width modulating (DPWM) the lamp current, or  
using both methods simultaneously to achieve the  
widest dimming range (>30:1). CCFL brightness can  
be controlled with either an analog voltage (both  
MAX1895 and MAX1995) or a two-wire SMBus™ com-  
patible interface (MAX1895 only).  
o Transformer Secondary Voltage Limiting to  
Reduce Transformer Stress  
o Lamp-Out Protection with 2s Timeout  
o Short-Circuit and Other Single-Point Fault  
Protections  
o Synchronizable DPWM Frequency  
The MAX1895/MAX1995 directly drive the four external  
N-channel power MOSFETs of the full-bridge inverter.  
An internal 5.3V linear regulator powers the MOSFET  
drivers, the synchronizable DPWM oscillator, and most  
of the internal circuitry. The MAX1895/MAX1995 are  
available in the space-saving 28-pin thin QFN package  
and operate over the -40°C to +85°C temperature  
range.  
o Dual-Mode Brightness Control Interface  
SMBus Serial Interface (MAX1895 Only)  
Analog Interface (Both Devices)  
o High-Accuracy Analog Interface  
Separate 100% Brightness Voltage Reference  
Pin (CRFSDA)  
Separate Minimum Lamp-Current Set-Point Pin  
(MINDAC)  
Applications  
Notebook Computers  
Car Navigation Displays  
LCD Monitors  
o Small Footprint 28-Pin Thin QFN (5mm x 5mm)  
Package  
Pin Configurations  
Point-of-Sale Terminals  
Portable Display Electronics  
TOP VIEW  
ILIM  
REF  
1
2
3
4
5
6
7
21 GH2  
Ordering Information  
20  
19  
LX2  
PART  
TEMP RANGE  
-40°C to +85°C  
-40°C to +85°C  
-40°C to +85°C  
-40°C to +85°C  
PIN-PACKAGE  
28 Thin QFN 5 ✕ 5  
28 QFN 5 ✕ 5  
MINDAC  
GND  
BST2  
MAX1895ETI  
MAX1895EGI*  
MAX1995ETI  
MAX1995EGI*  
18 BST1  
17 LX1  
MAX1895  
MODE  
28 Thin QFN 5 ✕ 5  
28 QFN 5 ✕ 5  
16  
CRF/SDA  
CTL/SCL  
GH1  
15 GL1  
*Contact factory for availability.  
Pin Configurations continued at end of data sheet.  
THIN QFN  
SMBus is a trademark of Intel Corp.  
________________________________________________________________ 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.  
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