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MAX8831EWE+T

更新时间： 2024-09-12 11:14:31
品牌 Logo 应用领域
美信 - MAXIM 转换器
页数 文件大小 规格书
27页 413K
描述
High-Efficiency, White LED Step-Up Converter with I2C Interface in 2mm x 2mm WLP

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中文翻译

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MAX8831EWE+T 技术参数

是否无铅： 不含铅是否Rohs认证： 符合
生命周期：Obsolete零件包装代码：BGA
包装说明：VFBGA, BGA16,4X4,20针数：16
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.82
模拟集成电路 - 其他类型：SWITCHING REGULATOR控制模式：CURRENT-MODE
控制技术：PULSE WIDTH MODULATION最大输入电压：5.5 V
最小输入电压：2.7 V标称输入电压：3.6 V
JESD-30 代码：S-PBGA-B16长度：2.045 mm
湿度敏感等级：1功能数量：1
端子数量：16最高工作温度：85 °C
最低工作温度：-40 °C最大输出电流：0.86 A
封装主体材料：PLASTIC/EPOXY封装代码：VFBGA
封装等效代码：BGA16,4X4,20封装形状：SQUARE
封装形式：GRID ARRAY, VERY THIN PROFILE, FINE PITCH峰值回流温度（摄氏度）：NOT SPECIFIED
认证状态：Not Qualified座面最大高度：0.69 mm
子类别：Switching Regulator or Controllers表面贴装：YES
切换器配置：BOOST最大切换频率：2200 kHz
技术：BICMOS温度等级：INDUSTRIAL
端子面层：NOT SPECIFIED端子形式：BALL
端子节距：0.5 mm端子位置：BOTTOM
处于峰值回流温度下的最长时间：NOT SPECIFIED宽度：2.045 mm
Base Number Matches：1

MAX8831EWE+T 数据手册

 浏览型号MAX8831EWE+T的Datasheet PDF文件第2页浏览型号MAX8831EWE+T的Datasheet PDF文件第3页浏览型号MAX8831EWE+T的Datasheet PDF文件第4页浏览型号MAX8831EWE+T的Datasheet PDF文件第5页浏览型号MAX8831EWE+T的Datasheet PDF文件第6页浏览型号MAX8831EWE+T的Datasheet PDF文件第7页 
19-4370; Rev 0; 11/08  
EVALUATION KIT  
AVAILABLE  
High-Efficiency, White LED Step-Up Converter  
2
with I C Interface in 2mm x 2mm WLP  
MAX831  
General Description  
Features  
The MAX8831 integrates a 60mA, 28V PWM DC-DC  
step-up converter with five low-dropout LED current  
regulators for display and keypad backlighting in cell  
phones, PDAs, and other portable devices. The IC pro-  
vides up to 90% efficiency over the entire input voltage  
range of 2.7V to 5.5V. The step-up converter operates  
at a fixed 2MHz switching frequency, enabling the use  
of very small external components to achieve a com-  
pact circuit area. For improved efficiency, the step-up  
converter automatically transitions to pulse-skipping  
mode at light loads.  
♦ 28V Step-Up DC-DC Converter  
Integrated NMOS Power Switch  
> 90% Efficiency  
Fixed 2MHz Switching  
Pulse Skipping for Improved Light-Load  
Efficiency  
Tiny External Components  
♦ I2C Programmable (0x9A Write/0x9B Read),  
Compatible with 1.8V Logic  
♦ Two 25mA Regulators for Display Backlighting  
I2C-Programmable Output Current (50µA to  
25.25mA)  
Each of the five current regulators accommodates up to  
9 series LEDs (depending on LED string forward volt-  
age), and is independently programmed using an I2C  
interface. Two of the current regulators (LED1, LED2)  
are intended to support display backlight functions and  
are programmable up to 25mA using a 128-step loga-  
rithmic dimming scheme. The other three regulators  
(LED3, LED4, LED5) are suitable for keyboard backlight  
functions or for driving signal indicators, and are pro-  
grammable up to 5mA using a 32-step logarithmic dim-  
ming scheme. The low-current regulators (LED3, LED4,  
LED5) can be operated from the step-up converter or  
from a separate low-voltage source.  
128-Step Logarithmic Dimming  
Individually Programmable Ramp (Up/Down)  
Timers  
Low Dropout (200mV max)  
♦ Three 5mA Current Regulators for Keypad  
Lighting  
I2C-Programmable Output Current (50µA to  
5.0mA)  
32-Step Logarithmic Dimming  
Individually Programmable Ramp (Up/Down)  
Timers  
The I2C interface controls all operational aspects of the  
current regulators, including: on/off state, LED current,  
ramp-up/ramp-down timers, and blink rate timers  
(LED3, LED4, LED5). The MAX8831 write/read address-  
es are factory programmed at 0x9A/0x9B (contact the  
factory for other address options).  
Individual Blink Rate and Duty Cycle Timers  
Low Dropout (150mV max)  
♦ Open/Short LED and Open-Circuit Diode  
Detection  
♦ Thermal-Shutdown and Output Overvoltage  
Protection  
The MAX8831 features open/short LED fault detection,  
output overvoltage protection, thermal shutdown, and  
open-circuit Schottky diode detection, with the status of  
each fault monitored continually for readback through  
the I2C interface.  
♦ Ultra-Low 0.1mA Shutdown Current  
♦ Tiny 2mm x 2mm, 16-Bump WLP Package  
Ordering Information  
The MAX8831 is available in a tiny 2mm x 2mm, 16-bump  
WLP package.  
PART  
TEMP RANGE  
PIN-PACKAGE  
Applications  
16 WLP  
2mm x 2mm  
MAX8831EWE+T  
-40°C to +85°C  
Cell Phones  
PDAs  
+Denotes a lead(Pb)-free/RoHS-compliant package.  
T = Tape and reel.  
Smartphones  
________________________________________________________________ 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.  
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