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Current Limited DC-DC Controll

Current Limited DC-DC Controll

Abstract: USB powered devices require a regulated supply. Unfortunately, the USB bus voltage can vary from 4V to 9V. Configuring the MAX668 boost controller into step-up/step-down topology can generate a current-limited regulated supply. ...

2009-05-04 标签:Current 764

Proper Layout and Component Se

Proper Layout and Component Se

正确的布局和元件选择控制电磁干扰 Abstract: Understanding the physics of voltage regulator topologies is important in designing power systems for EMI and EMC compliance. In particular, the physical principl...

2009-05-04 标签:电磁干扰 708

选择合适的CMOS模拟开关-Selecting the Ri

选择合适的CMOS模拟开关-Selecting the Ri

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...

2009-05-04 标签:CMOS 669

理想性因数补偿和串联电阻差异热感二极管-Compensati

理想性因数补偿和串联电阻差异热感二极管-Compensati

Abstract: When using an external thermal diode to measure temperature, the accuracy of the temperature measurement depends on the characteristics of the external diode. Two critical parameters that affect measurement accuracy are ideality ...

2009-05-04 标签:串联二极管 367

Convert the MAX1937/8/9 from L

Convert the MAX1937/8/9 from L

To prevent excessive power dissipation during output short circuit, the MAX1937/MAX1938/MAX1939 provide a latch off feature under either short circuit or under-voltage-lockout condition. Once the output is latched off either the input or t...

2009-05-04 标签:MAX1937 229

新增高电压能力的MAX471/MAX472高侧电流检测放大器

新增高电压能力的MAX471/MAX472高侧电流检测放大器

Abstract: An avalanche diode and current source provide a floating power supply to allow high-side current sense amplifiers to work at up to 300V. The MAX471 and MAX472 are complete bi-directional high-side current sense ...

2009-05-04 标签:MAXMAX471 744

驱动LED的电池供电的应用:控制亮度功率高效-Driving

驱动LED的电池供电的应用:控制亮度功率高效-Driving

Abstract: White light-emitting diode (WLED) drivers provide high efficiency and brightness matching for LCD backlighting in displays. To control brightness, these drivers regulate current going into LEDs that are arranged in either serial ...

2009-05-04 标签:LED 546

双向电流检测与单输出-Bi-directional Curr

双向电流检测与单输出-Bi-directional Curr

Abstract: Battery operated devices often need to monitor both charge and discharge currents. A dual current-sense amplifier and differential amplifier are combined to produce a single output voltage that indicates magnitude and direction o...

2009-05-04 标签:电流 310

选择最佳的电压基准源

选择最佳的电压基准源

摘要:电压基准源简单、稳定的基准电压,作为电路设计的一个关键因素,电压基准源的选择需要考虑多方面的问题并作出折衷。本文讨论了不同类型的电压基准源以及它们的关键...

2009-05-03 标签: 227

全陶瓷电容设计的降压/反相型3A、+/-5V电源

全陶瓷电容设计的降压/反相型3A、+/-5V电源

摘要:MAX8538双路同步buck控制器能够提供3A的+5V、-5V输出。利用一个控制器作为同步整流降压(buck)转换,而另一个通过变压器输出负压。电路支持软启动和软关断。 这里...

2009-05-03 标签:电容 424

满足AMD K8低功耗移动处理器规范的电源

满足AMD K8低功耗移动处理器规范的电源

摘要:本应用笔记描述了一个完全满足AMD® K8低功耗移动处理器规范的两相、同步整流型降压调节器。包括一个1.2V、27.3A参考设计的详细电路工作原理、电路图、元件清单以及测试...

2009-05-03 标签:处理器 415

通道晶体管增强调节的输出电流-Pass Transistor

通道晶体管增强调节的输出电流-Pass Transistor

Abstract: A 5V linear regulator with external pass transistor (which provides an additional, parallel path for load current) delivers twice as much output current (150mA to 300mA) while maintaining 5V regulation. In Figur...

2009-05-03 标签:晶体管 475

LVDS多媒体接口在汽车电子领域的应用前景

LVDS多媒体接口在汽车电子领域的应用前景

摘要:数据通信需求的增长造就了多种新型数据接口,这些数据接口针对不同的应用领域提供相应的电平指标。高数据率、高抗干扰性和构造简单成为开发这些接口的关键要求。...

2009-05-03 标签:LVDS 387

MAX16800测试板

MAX16800测试板

摘要:MAX16800测试板是一个简单的高亮度LED驱动电路板,专为驱动Osram、Lumileds、Nichia、Cree或其它LED驱动设计。测试表明,MAX16800适合用于汽车的内部和外部LED照明,以及商业和工业LE...

2009-05-03 标签:MAX16800 371

EMAT导线检测技术在现场试用

EMAT导线检测技术在现场试用 调查显示在上世纪90年代末ACSR 导线的致命性故障主要是断股造成的。随后的调查也证明断...

2009-05-02 标签:导线检测EMAT 489

使用数字分压器实现车灯调光,以节省功耗、提高效率

使用数字分压器实现车灯调光,以节省功耗、提高效率

摘要:本应用笔记介绍怎样使用低成本数字分压器来实现灯光强弱控制,既节省了功耗又提高了效率。 引言在汽车以及其他照明应用中,通常需要调节内部灯...

2009-05-02 标签:分压器 322

下一代汽车照明电源

下一代汽车照明电源

摘要:目前,汽车中大多采用LED和CCFL作为背光源,两种方案均需要特殊的供电电源。本应用笔记讨论了LED、CCFL灯源的供电方案,可理想用于汽车的内部和外部照明。 ...

2009-05-02 标签:照明电源 230

1 Dimming Ratio with the DS388

1 Dimming Ratio with the DS388

Abstract: This application note describes how CCFL lamps can be dimmed and how a user can maximize the dimming ratio of a CCFL inverter by using the DS3881 and DS3882 CCFL controllers. The note offers guidelines for practical implementatio...

2009-05-02 标签:DS3DS3881 392

使用MAX15005用于LED应用系统的供电和驱动

使用MAX15005用于LED应用系统的供电和驱动

摘要:本参考设计是汽车LED应用的完整系统设计。采用MAX15005电流模式控制器,将标准铅酸汽车电池的电压升至21V,用于驱动一串汽车LED。 下列提供了汽车LED系统的参...

2009-05-02 标签:LEDMAX150 311

MAX5073双通道降压转换器工作于2MHz开关频率的参考设

MAX5073双通道降压转换器工作于2MHz开关频率的参考设

摘要:MAX5073是一款可工作于降压或升压模式的双路转换器。作为双路降压转换器工作时,该器件两路输出可分别提供高达2A和1A的输出电流。该参考设计主要说明MAX5073作为降压转换...

2009-05-02 标签:双通MAX5073 427

交流耦合的优点

交流耦合的优点

摘要:本应用笔记介绍了交流耦合LVDS链路的优势,文章提供了电容选择的注意事项,并讨论了端接拓扑。 概述使用电容实现LVDS数据连接的交流耦合有很多益处...

2009-05-02 标签:LVDS 3187

导线清洁技术的研发和ACSR和ACSS导线承压连接件的安装

导线清洁技术的研发和ACSR和ACSS导线承压连接件的安装 承压连接件的故障会给输变电系统的安全可靠运行带来极大的风险。这类故...

2009-05-02 标签:清洁技术ACSR 372

基于Metso DNA技术的DCS

基于Metso DNA技术的DCS Metso Automation 将为新电站提供1 套基于MetsoDNA技术的全套DCS系统。 ...

2009-05-02 标签:DNAMetso 598

How to Prevent Flicker Caused

Abstract: The DS3881 and DS3882 CCFL controllers are used in automotive, industrial, and avionic applications to backlight LCD panels that require a high dimming ratio. These CCFL controllers use both analog lamp-current amplitude modulati...

2009-05-02 标签:Flicker 280

选择高亮度LED驱动器用于汽车照明应用-Selecting

选择高亮度LED驱动器用于汽车照明应用-Selecting

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, ...

2009-05-02 标签:LED驱动器 311

保护电流检测放大器反对过压瞬变-Protect Curren

保护电流检测放大器反对过压瞬变-Protect Curren

Abstract: This application note describes methods of protecting lower-voltage current sense amplifiers from high-voltage spikes and transients. Such conditions are frequently encountered in automotive car battery operation, and are referre...

2009-05-02 标签:放大器 220

电池切换电路制3V的系统-Battery-Switchove

电池切换电路制3V的系统-Battery-Switchove

Abstract: Portable systems often require operation from batteries or from a wall adapter. The MAX8865 low-dropout (LDO) linear regulator is used to provide the switchover function while supplying a regulator 2.84V that can deliver 100mA. ...

2009-04-30 标签:电路 734

Using Dallas' 1-Wire ICs i

Using Dallas' 1-Wire ICs i

Abstract: This application note presents to the reader a recommended Li-Ion battery pack circuit design for using Dallas Semiconductor 1-Wire® products with low-side N-channel safety FETs. Critical design considerations concerning the ...

2009-04-30 标签:ICWire 455

Using Dallas Battery Managemen

Using Dallas Battery Managemen

Abstract: This application note presents to the reader a reference circuit design that allows the use of the Dallas Semiconductor DS2438 battery monitor in a high voltage battery pack. Originally designed for use in battery packs whose vol...

2009-04-30 标签:IC 375

Battery Considerations for Tod

Battery Considerations for Tod

This application note is courtesy of Lou Adams from Tadiran Batteries, Port Washington, NY. Temperature RangeYour battery must work over the temperature range of the finished device. Although this seems obvious many times...

2009-04-30 标签:Battery 510

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