電源/新能源
提供權威的電源和新能源設計及電源管理資訊，內(nèi)容有醫(yī)療/工業(yè)電源、LED驅(qū)動、數(shù)字電源、電池技術、太陽能光伏等電源技術方案，包括電源測試/仿真/認證、便攜電源、電動車/新能源、AC-DC與DC-DC轉(zhuǎn)換、基準/監(jiān)控/保護電路等專業(yè)領域。
多功能集成電路啟用化學獨立電池充電-Versatile IC
Fast-moving battery technology poses a question for designers: whether to choose the latest technology for maximum performance or to sacrifice performance for a mature and more reliable technology. The advent of chemistry-independent batte...
2009-04-29 標簽：集成電路 721
反向電流保護電路-Reverse-Current Circu
Battery reversal can be fatal to portable equipment. However, numerous circuits can protect against the backward installation of batteries and other overcurrent-causing conditions. Battery-operated equipment is prone to the consequ...
Flyback Converter Serves Batte
Abstract: This article describes the design of a flyback power converter to operate CCD equipment such as digital cameras from four AAA cells. The MAX752 and a multiple output transformer deliver +15V, -7.5V and 5V. First pass design had l...
2009-04-29 標簽：Converter 2263
調(diào)節(jié)器拓撲電池供電系統(tǒng)-Regulator Topologi
Power supplies are perhaps the most crucial elements of a battery-powered system. Knowledge of some basic regulator topologies will help you select or design the right supply configurations for your needs.Portable computers and dig...
2009-04-29 標簽：調(diào)節(jié)器 1458
電力保護3V/5V雙電源系統(tǒng)-Power Conservat
Power saving is the common denominator for lower supply voltage and portable electronic systems. The paramount need in battery-powered and portable electronics—saving power—is also the major benefit in moving from 5V to 3.3V (and lower...
2009-04-29 標簽：雙電源 1743
電荷泵服務的便攜式設計-Charge Pumps Shine
New-generation ICs have combined with passive-component improvements to make charge-pump voltage conversion a favored approach in many applications. In many cases, the earlier charge pumps were considered either unsuitable or acceptable on...
2009-04-29 標簽：電荷泵 2529
Mathcad Calculates Input Capac
Abstract: Step-down buck regulators are extremely popular in a variety of portable and non-portable equipment. These buck converters are terminated with an input capacitor, CIN and an output capacitor, CO, at the output. CIN provides high-...
電荷泵電壓分配器的性能-Properties of the
Abstract: The charge-pump voltage converter is known mostly in its doubler and inverter configuration. This article focuses on the voltage-splitter charge-pump configuration, which divides the input voltage precisely by two. ...
2009-04-29 標簽：分配器 1306
Dual 1.4MHz Synchronous Buck R
Many portable universal serial bus (USB) devices are powered from the USB port. Most of these devices need a power fail warning to perform an orderly shut down in case of USB power loss. Referred to as a "dying gasp," the warning time is t...
2009-04-29 標簽：regulator 1589
The MAX1864 Generates 1.2V or
With most regulators, it is difficult to generate an output voltage that is less than the reference voltage. This note describes a way to use the MAX1864 to achieve an output voltage less than its 1.236V reference.The MAX1864 inclu...
2009-04-29 標簽：MAX1864 889
The MAX1802 for Digital Still
Digital camera supplies must be small and efficient. The power supplies must be relatively free of low-power noise, so that post filtering can be easily achieved. They must be capable of generating several voltages. Most camera makers requ...
2009-04-29 標簽：MAX1802 1142
Turn-On Switching Loss of An A
Figure 1 shows a simplified buck converter with asynchronous rectification based on the MAX1744/5 controller IC. Due to the turn-off nature of the diode, turn-on switching loss of the main switch (Q1) depends on the switching frequency, th...
2009-04-29 標簽：Converter 2397
模擬開關降低繼電器的功耗-Analog Switch Low
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...
2009-04-29 標簽：繼電器 1089
Adding POR Function to the MAX
The MAX1864 power-supply controller is designed for cost-effective applications such as cable modem consumer premise equipment (CPE), XDSL CPE and set-top boxes. It includes a current mode synchronized step-down controller and two positive...
2009-04-29 標簽：MAX1864 1076
接口的DS2760 1線高精度鋰離子電池監(jiān)控和保護IC在單片
Abstract: This application note provides the reader with information concerning how to interface the Maxim DS2760 Battery Monitor and Protector IC to a microcontroller. The DS5000 microcontroller module is used for example purposes. Both h...
獲取電量計應用中的鋰電池特性
摘要：精確的電池電量計量應建立在對在不同工作環(huán)境和條件下的電池各種特性的充分了解的基礎上。要獲取這些信息，應該在已知的條件下準確測試電池的各種特性。本應用筆記...
2009-04-29 標簽：電量計 1412
選擇最佳的電壓基準源
摘要：電壓基準源簡單、穩(wěn)定的基準電壓，作為電路設計的一個關鍵因素，電壓基準源的選擇需要考慮多方面的問題并作出折衷。本文討論了不同類型的電壓基準源以及它們的關鍵...
2009-04-29 標簽： 845
電源內(nèi)阻：扼殺DC-DC轉(zhuǎn)換效率的元兇
摘要：DC-DC轉(zhuǎn)換器常用于采用電池供電的便攜式及其它高效系統(tǒng)，在對電源電壓進行升壓、降壓或反相時，其效率高于95%。電源內(nèi)阻是限制效率的一個重要因素。本文描述了電源內(nèi)阻...
2009-04-29 標簽：轉(zhuǎn)換器 1036
電池的合理選擇
摘要：最終用戶是否滿意其便攜式設備的設計，很大程度上取決于電池的性能。 電池的關鍵指標當然是電池的使用壽命。從表面上看，這只是一個簡單的規(guī)格，但它卻涉及到了...
2009-04-29 標簽： 717
上電復位與相關監(jiān)控功能
摘要：本文討論用于單電源或雙電源處理器的上電復位功能和門限電壓的選擇策略，另外，還探討了手動復位、電源失效和低電壓檢測等功能。文中闡述了避免使用分立POR和處理器...
2009-04-29 標簽：電復位 1163
模擬集成電路的低電壓系統(tǒng)-Analog ICs for Lo
Abstract: This article about low-voltage ICs discusses many types of low-voltage ICs, including voltage regulators, data converters, op amps and current monitors, comparators, microprocessor supervisors, voltage references, analog switches...
2009-04-29 標簽：集成電路 1128
用兩個單向電流檢測放大器組成一個雙向電流檢測放大器
摘要：許多電池電流監(jiān)測應用中需要雙向電流檢測功能，以測量電池的充電和放電電流。本文介紹了怎樣用兩個單向電流檢測放大器，比如MAX4172和MAX4173，組成一個雙向電流檢測放大...
電流檢測集成電路阻止過損傷-Current-Sense IC
Abstract: This application note describes the use of a current-sense amplifier to monitor the load current of a circuit supply voltage. When the current being drawn from the supply exceeds the predetermined level, an external pass transist...
2009-04-29 標簽：集成電路 1187
Overcurrent Monitor Operates u
Abstract: Using a current-sense amplifier, a high-side MOSFET driver, and a latching voltage monitor a circuit can be easily constructed that protects from overcurrent conditions and operates at voltages as high as 26V. W...
2009-04-29 標簽：Overcurren 932
斷路器處理電壓76V-Circuit Breaker Han
Abstract: A current-sense amplifier, comparator, external CMOS switch, and an external transistor can be used to create a circuit breaker. The simplicity of low-side current monitoring can mask the advantages of a high-si...
2009-04-29 標簽：斷路器 1175
超載保護電路電池和電源-Overload Circuitry
Abstract: A combination of current-sense amplifier, dual-comparator and external CMOS switches can be used to prevent the damaging effects of a reversed-polarity battery or short-circuit load. The most widely used device ...
2009-04-29 標簽：電路 1259
Snubber Circuits Suppress Volt
Abstract: The flyback dc-dc converter topology results in significant cost and space savings for multiple output power supplies with high output voltage for power levels up to 100W. Flyback topologies store and transfer energy using a tran...
2009-04-29 標簽：Voltage 2792
高側(cè)電流檢測的測量：集成電路和原則-High-Side Cu
Abstract: This application note describes the use of current sense amplifiers, differential amplifiers and instrumentation amplifiers to measure battery charge and discharge currents in portable equipment, computer notebooks and USB access...
2009-04-29 標簽：集成電路 1714
使用MAX8515并聯(lián)穩(wěn)壓器輸出電壓感測應用的DC - DC
Abstract: Output overvoltage protection is a critical feature for DC-DC converters in order to protect sensitive loads from permanent damage. The basic requirements for an overvoltage protection (OVP) circuit are precise sensing of the out...
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