Piezoelectric motors are used in digital cameras for autofocus,zooming and optical image stabilization. Theyare relatively small, lightweight and effi cient, but theyalso require a complicated driving scheme. Traditionally,this challenge has been met with the use ofseparatecircuits, including a step-up converter and an oversizedgeneric full-bridge drive IC. The resulting high componentcount and large board space are especially problematicin the design of cameras for ever shrinking cell phones.The LT®3572 solves these problems by combining astep-up regulator and a dual full-bridge driver in a 4mm× 4mm QFN package. Figure 1 shows a typical LT3572Piezo motor drive circuit. A step-up converter is usedto generate 30V from a low voltage power source suchas a Li-Ion battery or any input power source within thepart’s wide input voltage range of 2.7V to 10V. The highoutput voltage of the step-up converter, adjustable upto 40V, is available for the drivers at the VOUT pin. Thedrivers operate in a full-bridge fashion, where the OUTAand OUTB pins are the same polarity as the PWMA andPWMB pins, respectively, and the OUTA and OUTB pinsare inverted from PWMA and PWMB, respectively. Thestep-up converter and both Piezo drivers have their ownshutdown control. Figure 2 shows a typical layout
上传时间: 2013-11-18
上传用户:hulee
QA03是专为需要两组隔离电源的IGBT驱动器而设计的DC-DC模块电源。其内部采用了两路独立输出后共接模式,可以更好的为IGBT的开通与关断提供能量。同时具有输出短路保护及自恢复能力。
上传时间: 2013-11-21
上传用户:极客
QA02是专为需要两组隔离电源的IGBT驱动器而设计的DC-DC模块电源。其内部采用了两路独立输出后共接模式,可以更好的为IGBT的开通与关断提供能量。同时具有输出短路保护及自恢复能力。
上传时间: 2014-01-11
上传用户:blans
对于IC来说,“地球环境友好”有两个方面:一方面是产品中不含或者减少对环境有害的物质;另一方面是针对全球气候变暖问题,为社会提供能够有效降低设备耗电量的IC,这将使发电厂产生的CO2得以削减。并且,开发并提供面向小型设备的IC可以进一步减小设备的体积并降低耗电量,为节能型社会贡献力量。
上传时间: 2013-12-15
上传用户:xitai
常用电源IC型号简介
上传时间: 2013-11-22
上传用户:ynzfm
LED照明驱动IC--NO5
上传时间: 2013-10-18
上传用户:ginani
升压IC
上传时间: 2013-11-23
上传用户:agent
遥控车IC原理图
上传时间: 2013-10-10
上传用户:18602424091
IC卡智能水表以AT89C51为控制核心,实现IC卡的读写,液晶显示的控制,电磁阀的控制,脉冲的提取,同时具有安全保护电路、记忆单元电路、通信接口电路,完成整个水表信号的读、写处理,监控水表工作的功能。在设计中编程语言使用了C51,并采用模块化设计方法,不仅易于编程和调试,也可减小软件故障率和提高软件的可靠性。本系统具有性能优良、稳定可靠的优点。
上传时间: 2013-12-02
上传用户:kao21
ZLG7290+I2C接口键盘及LED驱动器数据手册
上传时间: 2013-10-19
上传用户:wangrong