To this day, Power over Ethernet (PoE) continues to gainpopularity in today’s networking world. The 12.95Wdelivered to the Powered Device (PD) input supplied bythe Power Sourcing Equipment (PSE) is a universal supply.Each PD provides its own DC/DC conversion from anominal 48V supply, thus eliminating the need for a correctvoltage wall adapter. However, higher power devicescan not take advantage of standard PoE because of itspower limitations, and must rely on a large wall adapteras their primary supply. The new LTC4268-1 breaks thispower barrier by allowing for power of up to 35W for suchpower-hungry 2-pair PoE applications. The LTC4268-1provides a complete solution by integrating a high powerPD interface control with an isolated fl yback controller.
上传时间： 2014-12-24
上传用户：jasson5678
The LTC®4099 high effi ciency USB power manager andLi-Ion/Polymer battery charger seamlessly managespower distribution from multiple sources in portableapplications. It is differentiated from other USB powermanagers by its bidirectional I2C port that allows the hostmicroprocessor to control and monitor all aspects of theUSB power management and battery charging processes.In addition, a programmable interrupt generation functionalerts the host microprocessor to changes in device statusand provides unprecedented control of power managementfunctions. This high degree of confi gurability allowspost-layout changes in operation, even changes in thefi eld, and it allows a single qualifi ed device to be usedin a variety of products, thus reducing design time andeasing inventory management.
上传时间： 2013-10-22
上传用户：18602424091
USB转CAN上位机软件
上传时间： 2013-10-24
上传用户：1214209695
这个模块可以被看作是一个USB2.0协议的转换器，将电脑的USB2.0接口转换为一个透明的并行总线，就象单片机总线一样。从而几天之内就可以完成USB2.0产品的设计。
上传时间： 2013-11-01
上传用户：shaoyun666
USB总线转接芯片CH341中文手册
上传时间： 2014-01-25
上传用户：Zero_Zero
关于51单片机上实现modbus协议
上传时间： 2013-10-31
上传用户：pol123
1. 支持USB1.1或USB2.0通信； 2. 全面支持WIN98、WINME、WIN2000、WINXP、VISTA、WIN7等操作系统； 3. 采用USB口供电，板内带有500mA自恢复保险丝或保险电阻，保护电脑主板不被意外烧毁； 4. 在对芯片编程时可以使用目标系统本身电源，也可以使用编程器从USB口取电供给目标板，但应保证目标标电流不大于500mA，以免不能正常编程； 5. 编程完成不影响目标板的程序运行； 6. 支持STC全系列芯片烧录； 7. 编程器提供3.3V与5V的电压输出接口； 8. 速度比并口编程更快更稳定，更方便笔记本电脑用户使用； 9. 采用进口原装芯片，能进行高速稳定编程；
上传时间： 2013-11-06
上传用户：新手无忧
关于STM32的USB应用方面的知识
上传时间： 2013-11-10
上传用户：wojiaohs
USB接口波形发生器
上传时间： 2013-11-20
上传用户：jackandlee
STM32 USB Mass Storage学习资料.pdf
上传时间： 2013-10-31
上传用户：gxmm
