中青年干部培训班学员井冈山考察学习体会

【adi - adp1653】产品规格input voltage range 3 to 5.5vshutdown current 0.1uaoperating current 500uaswitching frequency 1.2mhzoperating temperature ﹣40℃ to +125℃产品特性92% peak efficiency2.1 a， 12 v power switchpin-selectable interface: 2-bit logic or i2c®programmable indicator led current up to 20 malow noise， 1.2 mhz pwm operationinterrupt output pinfault condition registershort-circuit protectionoutput overvoltage protectionthermal overload protectionintegrated current limit and soft startsmall 3 mm × 3 mm， 16-lead lfcsp footprint产品应用camera-enabled cellular phones， smart phones，digital still cameras， camcorders， pdas文字介绍adp1653 是高效率led闪光灯/手电筒驱动器， 可动态调整led的驱动电流提高闪光灯的亮度及拍摄相片的影像质量. 92%的超高效率胜过charge pump的方案可有效延长电池的使用时间.ad1653提供了gpio及i2c两种控制界面，并内建多项安全检测功能 如sort start/flash timeout/output current limit/thermal protection/overvoltage protection，能透过内建的中断机制通知系统mcu进而保护产品超小型化包装非常适合用于手持装置. 【adi - adp5520】产品规格input voltage range 2.7 to 5.5vshutdown current 0.1uastandby current 17uaoperating temperature ﹣40℃ to +85℃产品特性85% efficiencyprogrammable backlight fade in/out timesprogrammable backlight dim and off timesambient light sensor for automatic backlight adjustment64 programmable auxiliary led current levelsi2c compatible serial interfacecurrent limit protectionshort-circu