电源设计应用
Tech Brief 10: ESD Considerati
Abstract: Technical brief suggests ESD protection schemes for RS-232 transceivers. Basic diode clamps, TransZorb™, and zener diodes are considered. Internal latch-up is explained. Protection of vulnerable CMOS devic...
2009-04-22 2330
电表应用中RS-485收发器的设计考虑
摘要：自动抄表技术为电表提供一个通信端口，以电子方式远程读取数值。本应用笔记讨论Maxim RS-485收发器的不同特性，这些特性使RS-485收发器非常适合用于电表通信端口。 ...
2009-04-22 947
影响开关模式、DC-DC转换器效率的主要因
影响开关模式、DC-DC转换器效率的主要因 本文详细介绍了开关电源(SMPS)中各个元器件损耗的计算和预测技术，并讨论了提高开关调节器效率的相关技术和特点。 ...
2009-04-21 937
LED照明的电源拓扑结构
LED 照明的电源拓扑结构 本文对 LED 特性及驱动 LED 时需要权衡的因素作了概述，并对适用于驱动 LED 和进行 LED 调光的各种开关电源...
2009-04-21 936
多媒体处理器动态电源管理技术
多媒体处理器动态电源管理技术 多媒体处理器通常是便携式电子设备中功耗最高的器件。降低 CPU 功耗要求的常见方法是降低时钟频率或工作电压，但是一般...
2009-04-21 422
估算涓流充电实时时钟的超级电容备份时间
摘要：Maxim实时时钟(RTC)系列产品包含了几款带涓流充电器的器件，涓流充电器可以为第二个备份电池或电容充电。电池或电容用来在VCC掉电时维持时钟工作。储存在电容内的能量需...
2009-04-21 1126
投币锂电池：寿命预测中的应用-Lithium Coin-Ce
Abstract: This application note discusses various contributors to battery capacity consumption in a battery-backed application, and how to predict battery lifetime in a system. A designer should be able to use this application note to dete...
2009-04-21 655
Problems and Solutions for Adj
Abstract: Recent U.S. legislation increased the daylight saving time (DST) period by four weeks. This change will affect systems that adjust for DST by using real-time clocks (RTCs) with an integrated DST adjustment. This note discusses is...
2009-04-21 831
DS1375 Power Line to 60Hz Cloc
Abstract: The DS1375 2-wire digital real-time clock (RTC) is a low-power, clock/calendar that can operate from a digital clock input at one of four frequencies: 32.768kHz, 8.192kHz, 60Hz, or 50Hz. This application note shows how to derive ...
2009-04-21 1136
充电电池和单机快速充电器概述
摘要：本应用笔记简单介绍了镍镉(NiCd)、镍氢(NiMH)和锂离子(Li-Ion，Li+)可充电电池, 讨论它们的性能，并说明在不需要微控制器的情况下如何构建单机结构，安全、快速地为镍氢和锂...
2009-04-21 1065
下一代视频滤波放大器，延长了手持式视频系统的电池使用时间
要：越来越多的便携式设备，例如数码相机、蜂窝电话和便携式媒体播放器等，都开始逐渐增加复合视频输出的连接功能。这类设备中，视频数/模转换器(DAC)产生复合视频信号，在...
2009-04-21 390
负电荷泵为WLED背光应用提供堪比电感电路的高效率
摘要：设计人员通常采用电荷泵或基于电感的boost电路提供白光LED (WLED)的正向导通偏置电压。电荷泵价格较低且使用方便，但截至目前，这种架构所能提供的效率低于基于电感的boost...
2009-04-21 683
Keep Power Consumption in Chec
Abstract: Portable electronic devices usually include a single 3- or 4-connector jack which can be a stereo headphone jack, a mono headphone jack with microphone input and hook switch, or a stereo headphone jack with microphone/hook-switch...
2009-04-21 1049
选择高亮度LED驱动器用于汽车照明应用
Abstract: This application note provides an overview of HB LED driver selection criteria for automotive lighting applications. It reviews HB LED driver topologies and recommends configurations for various automotive lighting applications, ...
2009-04-21 462
ResourceSmart™ (Green) I
Abstract: As consumers demand environmentally friendly ("green," or ResourceSmart) electronics, design engineers must seek new design techniques, standards, and products. This application note lists links to a variety of government, indust...
2009-04-21 415
Designing a 4-20mA Current Loo
Abstract: Current-mode data transmission is the preferred technique in many environments, particularly in industrial applications. This application note describes the design of a 4-20mA current loop using the MAX1459 sensor signal conditio...
2009-04-20 2479
Buffered Linear-Ramp Generator
Abstract: A precision ramp generator produces a 0 to 5V ramp while operating from a single 5V supply. Using standard circuits and no auxiliary voltage generators, such as charge pumps or inductive DC-DC converters, it is ...
2009-04-20 1722
DS1090频率计算器
摘要：本应用笔记提供一个简单易用的频率计算器，用于确定适当的型号、偏置电阻以及DS1090低频、电阻可编程、扩频EconOscillator™的输入设置。DS1090可提供125kHz至8MHz的扩频、方...
2009-04-20 396
Analog Switches Operate With 3
Abstract: By adding a voltage doubler and voltage inverter, a single 3V or 5V power supply can produce the voltages necessary to improve the performance on a dual voltage analog switch. With the higher power supplies and wider range, the o...
2009-04-20 834
Minimizing Total Harmonic Dist
Abstract: Analog switches are commonly used in audio systems to switch low-level inputs or adjust audio filter characteristics. Selecting the proper analog switch can help optimize the total harmonic distortion (THD) of a system within the...
2009-04-20 969
Analog Switch Lowers Relay Pow
Abstract: Design idea outlining a method to use an analog switch and discrete components to reduce the power dissipated in relay actuation. Relays are often used as electrically controlled switches. Unlike transistors, th...
2009-04-20 1532
Selectable-Range Current Loop
Abstract: This article shows an example of implementing a 4-20mA or 0-20mA current-loop output using a voltage output digital-to-analog converter (DAC) and a V to I converter. Current-loop signals, as opposed to voltage s...
2009-04-20 962
Fault Protection Saves Multipl
Abstract: Discrete components are available to protect against faults caused when a voltage applied to the input of a switch, mux, or signal-line circuit protector exceeds the voltage at the power supply pins. A more practical approach to ...
2009-04-20 1940
Selecting the Right CMOS Analo
Abstract: This tutorial outlines the basic construction, operation, and applications of analog switches. On-resistance, flatness, and charge-injection, each a performance-related specification, are defined. Application-specific features in...
2009-04-20 959
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