LTC3524 的 2.5V 至 6V 輸入電源範圍非常適合於那些從鋰離子電池或者多節堿性或鎳電池供電的便攜式設備。LCD 和 LED 驅動器的工作頻率均為 1.5MHz,因而允許使用纖巧、低成本的電感器和電容器。
上传时间: 2013-11-22
上传用户:zzbbqq99n
The makers of handheld medical, industrial and consumerdevices use a wide variety of high resolution, small tomedium sized color TFT LCD displays. The power supplydesigners for these displays must contend with shrinkingboard area, tight schedules, and variations in displaytypes and feature requirements. The LTC®3524 simplifi esthe designer’s job by combining a versatile, easily programmed,TFT LCD bias supply and white LED backlightdriver in a low profi le 4mm × 4mm QFN package.
上传时间: 2013-10-26
上传用户:chens000
Avalanche photo diode (APD) receiver modules arewidely used in fi ber optic communication systems. AnAPD module contains the APD and a signal conditioningamplifi er, but is not completely self contained. It stillrequires signifi cant support circuitry including a highvoltage, low noise power supply and a precision currentmonitor to indicate the signal strength. The challenge issqueezing this support circuitry into applications withlimited board space. The LT®3482 addresses this challengeby integrating a monolithic DC/DC step-up converter andan accurate current monitor. The LT3482 can supportup to a 90V APD bias voltage, and the current monitorprovides better than 10% accuracy over four decades ofdynamic range (250nA to 2.5mA).
上传时间: 2014-01-18
上传用户:wenyuoo
High voltage buck DC/DC controllers such as the LTC3890(dual output) and LTC3891 (single output) are popular inautomotive applications due to their extremely wide 4V to60V input voltage range, eliminating the need for a snubberand voltage suppression circuitry. These controllersare also well suited for 48V telecom applications whereno galvanic isolation is required.
上传时间: 2013-10-31
上传用户:wwwe
Telecommunication, satellite links and set-top boxes allrequire tuning a high frequency oscillator. The actualtuning element is a varactor diode, a 2-terminal device thatchanges capacitance as a function of reverse bias voltage.1 The oscillator is part of a frequency synthesizingloop, as detailed in Figure 1. A phase locked loop (PLL)compares a divided down representation of the oscillatorwith a frequency reference. The PLL’s output is levelshifted to provide the high voltage necessary to bias thevaractor, which closes a feedback loop by voltage tuningthe oscillator. This loop forces the voltage controlledoscillator (VCO) to operate at a frequency determined bythe frequency reference and the divider’s division ratio.
上传时间: 2013-12-20
上传用户:ABCDE
PCF8535是一款低功耗的CMOS点阵液晶驱动器,能以1:17,1:24,1:34、1:49和1:65的多路复用速率驱动点阵液晶显示器,驱动点阵能力可达65×133点。PCF8535将液晶驱动器所须的全部功能(包括产生LCD偏置电压的产生等)都集成在芯片里面,这样做可以大大地减少外部器件并降低功耗。
上传时间: 2013-11-25
上传用户:1047385479
PCF2119x是一款低功耗的CMOS型LCD控制器和驱动器,可以驱动一块点阵LCD显示2行每行16个5×8格式的字符,或者显示1行每行32个5×8格式的字符。PCF2119x单片(无需其他外围器件)提供显示所需的所有必要功能,包括片内产生LCD偏置电压。PCF2119x的这些特性使得其需要的外围器件极少并且能降低系统的电流损耗。PCF2119x可通过4或8位总线或者2-wire的I2C总线与大多数微控制器连接。该芯片包含一个字符发生器并且可以显示英文、数字和假名(日语)字符。
上传时间: 2013-11-06
上传用户:dalidala
PCF2113x是一款低供电电压的LCD控制器/驱动器,采用CMOS工艺,它可以用来驱动2×12或1×24的点阵液晶,每个字符为5×8个点。PCF2113x提供显示所需的所有功能,包括片内产生LCD偏置电压。PCF2113x的这些特性使得其需要的外围器件极少,还能降低系统的功耗。PCF2113x可通过4或8位总线或者2线的I2C总线与大多数微控制器连接。该芯片包含一个字符发生器并且可以显示英文、数字和假名(日语)字符。
上传时间: 2013-10-08
上传用户:liaocs77
当捷联惯组(SIMU)安装到载车上存在安装误差时,航位推算误差与安装误差、里程计刻度系数误差、初始对准误差有关。利用捷联惯导系统和航位推算系统构成组合导航系统可实现对上述误差的估计。为此,推导了惯组和载车间存在安装误差时的惯导/航位推算组合导航系统的系统方程。仿真分析表明,组合导航系统可有效估计出安装误差、水平陀螺随机常值漂移和加速度计随机常值偏置。
上传时间: 2013-11-20
上传用户:ruixue198909
概述恩智浦半导体推出其第二代车载网络CAN/LIN核的系统基础芯片(SBC)UJA1078TW产品,实现了性能、功耗以及电子控制单元(ECU)成本的优化,惠及车身控制模块、车内温度控制、座椅控制、电动助力转向(EPS)、自适应照明、雨量/光强传感器、泊车辅助及传输模块等广泛的车载应用。UJA1078TW支持车载网络互联应用,这些应用通过使用高速CAN作为主网络接口和LIN作为本地子总线来控制电源和传感器设备。UJA1078TW SBC产品集成以下功能器件: 高速CAN收发器,可相互操作和向下兼容CAN收发器TJA1042,符合ISO 11898-2 和ISO 11898-5标准; LIN收发器,符合LIN 2.1、LIN2.0和SAE J2602标准,并兼容LIN1.3规范; 先进的独立看门狗(UJA1078/ xx/WD版); 250mA的电压调节器,用于微控制器(3.3V或5V)及外部设备的可扩展稳压器(V1);还可配置外部PNP晶体管进行扩展,从而令电流输出能力更强、耗散分布得到优化; 独立的电压调节器,用来给UJA1075TW芯片内部的CAN收发器供电; 串行外设接口(SPI)(全双工); 2个本地唤醒输入端口,带循环偏置选择; 软备件(Limp home)输出端口。
上传时间: 2013-10-11
上传用户:zsjzc