G5177为致新科技为移动电源领域量身打造的2A输出同步升压IC,效率高达90%以上，价格便宜，周边电子元件少，省肖特基和关断MOS,整体成本大大降低，是移动电源和移动电源+WIFI方案的首选。 我们还有1A同步升压产品可以P2P选择。
上传时间： 2013-10-12
上传用户：tb_6877751
两节锂电充电IC-ASC8512 ASC8512 为开关型两节锂聚合物电池充电管理芯片，非常适合于便携式设备的充电管理应用。ASC8512 集内置功率MOSFET、高精度电压和电流调节器、预充、充电状态指示和充电截止等功能于一体，采用TSSOP-14、SSOP-14两种封装形式。ASC8512对电池充电分为三个阶段：预充（Pre-charge）、恒流（CC／Constant Current）、恒压（CV／Constant Voltage）过程，恒流充电电流通过外部电阻决定，最大充电电流为2A.ASC8512 集成电流限制、短路保护，确保充电芯片安全工作。ASC8512 集成NTC 热敏电阻接口，可以采集、处理电池的温度信息，保证充电电池的安全工作温度。 两节锂电池充电IC ASC8512特点： 1.充2节锂离子和锂聚合物电池 2.开关频率达400K 3.充电电流最大可做2A 4.输入电压9V到18V 5.电池状态检测 6.恒压充电电压值可通过外接电阻微调 7.千分之五的充电电压控制精度 5.防反向保护电路可防止电池电流倒灌 6.NTC 热敏接口监测电池温度 7.LED充电状态指示 8.工作环境温度范围：-20℃～70℃ 9.TSSOP-14 应用领域：应用 ●手持设备，包括医疗手持设备 ●Portable-DVD，PDA，移动蜂窝电话及智能手机 ●上网本、平板电脑、mid ●自充电电池组
上传时间： 2013-11-06
上传用户：chfanjiang
ASC8511 是开关式、单节锂电池充电管理芯片,采用峰值电流模控制的BUCK 拓扑结构，最大充电电流可达2.5A. ASC8511 通过恒压控制环（CV）和恒流控制环（CC）来调整锂电池充电电压和恒流充电电流.ASC8511 集成电池过温保护、充电时间限制、输出短路等保护功能，通过NTC 检测电池温度，可以实现电池过热保护功能，两个LED 指示灯指示电池充电状态.ASC8511 采用16 脚T-SSOP 封装. 特点 ● 充电电压精度0.5% ● 最大充电电流2.5A ● 自耗电小于5uA ● 电阻可编程调节恒流充电电流 ● 开关频率500KHZ ● 适用于单节锂电池充电 ● 软启动 ● 电池过温保护 ● 芯片过热保护 ● 状态指示 ● 环境温度范围: -20℃～70℃ ● 16 脚T-SSOP 封装 应用 ● 手持设备、POS机 ● mid、数码产品 ● 移动DVD ● 笔记本、对讲机
上传时间： 2013-11-22
上传用户：13788529953
ST 公司的STM32TS60 是集成了I2C,SPI,UART 和USB 接口的数字电阻型多触摸屏控制器, 能同时跟踪多达10 个单独的触摸,分辨率达0.17mm,触摸屏扫描速率达125 Hz 到 250 Hz, 主要用于游戏机,智能手机,PMP,PND,mid 和笔记本电脑.本文介绍STM32TS60 主要特 性,2.5”-6”屏单器件应用电路。
上传时间： 2013-10-21
上传用户：dingdingcandy
This white paper discusses how market trends, the need for increased productivity, and new legislation have accelerated the use of safety systems in industrial machinery. This TÜV-qualified FPGA design methodology is changing the paradigms of safety designs and will greatly reduce development effort, system complexity, and time to market. This allows FPGA users to design their own customized safety controllers and provides a significant competitive advantage over traditional microcontroller or ASIC-based designs. Introduction The basic motivation of deploying functional safety systems is to ensure safe operation as well as safe behavior in cases of failure. Examples of functional safety systems include train brakes, proximity sensors for hazardous areas around machines such as fast-moving robots, and distributed control systems in process automation equipment such as those used in petrochemical plants. The International Electrotechnical Commission’s standard, IEC 61508: “Functional safety of electrical/electronic/programmable electronic safety-related systems,” is understood as the standard for designing safety systems for electrical, electronic, and programmable electronic (E/E/PE) equipment. This standard was developed in the mid-1980s and has been revised several times to cover the technical advances in various industries. In addition, derivative standards have been developed for specific markets and applications that prescribe the particular requirements on functional safety systems in these industry applications. Example applications include process automation (IEC 61511), machine automation (IEC 62061), transportation (railway EN 50128), medical (IEC 62304), automotive (ISO 26262), power generation, distribution, and transportation. 图Figure 1. Local Safety System
上传时间： 2013-11-05
上传用户：维子哥哥
ARM核心是主控SOC中的重要部分，系统的日常应用都由ARM核心来完成，因此ARM核心的效能很大程度上跟用户体验有关。ARM公司一般用DMIPS/MHz来标称ARM核心的性能。DMIPS是Dhrystone Million Instructions executed Per Second的缩写，反映核心的整数计算能力。但Dhrystone算法代码本身比较叫，可以完全放到Cache中执行，因此反映的只是核心能力，并不能反映缓存、内存I/O性能。
上传时间： 2013-10-16
上传用户：devin_zhong
This white paper discusses how market trends, the need for increased productivity, and new legislation have accelerated the use of safety systems in industrial machinery. This TÜV-qualified FPGA design methodology is changing the paradigms of safety designs and will greatly reduce development effort, system complexity, and time to market. This allows FPGA users to design their own customized safety controllers and provides a significant competitive advantage over traditional microcontroller or ASIC-based designs. Introduction The basic motivation of deploying functional safety systems is to ensure safe operation as well as safe behavior in cases of failure. Examples of functional safety systems include train brakes, proximity sensors for hazardous areas around machines such as fast-moving robots, and distributed control systems in process automation equipment such as those used in petrochemical plants. The International Electrotechnical Commission’s standard, IEC 61508: “Functional safety of electrical/electronic/programmable electronic safety-related systems,” is understood as the standard for designing safety systems for electrical, electronic, and programmable electronic (E/E/PE) equipment. This standard was developed in the mid-1980s and has been revised several times to cover the technical advances in various industries. In addition, derivative standards have been developed for specific markets and applications that prescribe the particular requirements on functional safety systems in these industry applications. Example applications include process automation (IEC 61511), machine automation (IEC 62061), transportation (railway EN 50128), medical (IEC 62304), automotive (ISO 26262), power generation, distribution, and transportation. 图Figure 1. Local Safety System
上传时间： 2013-11-14
上传用户：zoudejile
读取MapInfo的交换格式的Mif\mid文件
上传时间： 2014-01-21
上传用户：熊少锋
MAPINFO各式转换极为TXT---->mid\MIF
上传时间： 2013-11-30
上传用户：stampede
读取资源包的工具，自己写的。凑个数。效果不错。可以识别png mid wav .适合手机游戏开发
上传时间： 2014-01-24
上传用户：lps11188
