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
The TRS232E is a dual driver/receiver that includes a capacitive voltage generator to supply TIA/RS-232-Fvoltage levels from a single 5-V supply. Each receiver converts TIA/RS-232-F inputs to 5-V TTL/CMOS levels.This receiver has a typical threshold of 1.3 V, a typical hysteresis of 0.5 V, and can accept ±30-V inputs. Eachdriver converts TTL/CMOS input levels into TIA/RS-232-F levels. The driver, receiver, and voltage-generatorfunctions are available as cells in the Texas Instruments LinASIC™ library.
上传时间： 2013-10-07
上传用户：waitingfy
The ISO7220 and ISO7221 are dual-channel digital isolators. To facilitate PCB layout, the channels are orientedin the same direction in the ISO7220 and in opposite directions in the ISO7221. These devices have a logic inputand output buffer separated by TI’s silicon-dioxide (SiO2) isolation barrier, providing galvanic isolation of up to4000 V. Used in conjunction with isolated power supplies, these devices block high voltage, isolate grounds, andprevent noise currents on a data bus or other circuits from entering the local ground and interfering with ordamaging sensitive circuitry.
上传时间： 2013-10-24
上传用户：hbsunhui
CELL组件的右键实例，可以帮助VB编程爱好者节约大量时间和精力，直接复制就可以使用。
标签： CELL
上传时间： 2015-04-12
上传用户：mikesering
this a html prg and it used write web cell.
上传时间： 2013-12-10
上传用户：koulian
Dual Licensing in Open Source Software Industry
标签： Licensing Industry Software Source
上传时间： 2014-08-16
上传用户：lyy1234
快快乐乐学IC design系列《Cell-Based Design》，芯片设计方面的
标签： Cell-Based design Design
上传时间： 2013-12-12
上传用户：zhichenglu
cell architecture training pdf document, very good
标签： architecture training document cell
上传时间： 2015-08-24
上传用户：懒龙1988
SXGA LCD Controller with Analog Interface and Dual LVDS Transmitter Preliminary Data Sheet Version 0.3
标签： Preliminary Transmitter Controller Interface
上传时间： 2013-11-28
上传用户：我干你啊
关于SL811st的技术文档.SL811S/T USB Dual Speed Slave Controller Data Sheet
标签： Controller 811 Speed Slave
上传时间： 2013-12-20
上传用户：yph853211
