電源/新能源
提供權(quán)威的電源和新能源設(shè)計(jì)及電源管理資訊,內(nèi)容有醫(yī)療/工業(yè)電源、LED驅(qū)動(dòng)、數(shù)字電源、電池技術(shù)、太陽能光伏等電源技術(shù)方案,包括電源測試/仿真/認(rèn)證、便攜電源、電動(dòng)車/新能源、AC-DC與DC-DC轉(zhuǎn)換、基準(zhǔn)/監(jiān)控/保護(hù)電路等專業(yè)領(lǐng)域。電子負(fù)載用軟開關(guān)DC/DC變換器的實(shí)現(xiàn)
【摘 要】 討論了軟開關(guān)技術(shù)在電子負(fù)載DC/DC變換器中的應(yīng)用,并介紹了利用數(shù)字信號(hào)處理器實(shí)現(xiàn)的移相控制方法,研制了以TMS320F240為控制核心的6kW DC/DC變換器樣機(jī)。...
2009-05-10 標(biāo)簽:變換器 894
用COP820CJ實(shí)現(xiàn)可變輸入范圍的PWM A/D轉(zhuǎn)換
【摘 要】 介紹了8位單片機(jī)COP820CJ,并給出了一個(gè)用COP820CJ片上比較器設(shè)計(jì)的基于脈寬調(diào)制的A/D變換器,該A/D變換器可根據(jù)輸入電壓進(jìn)行軟件調(diào)整。...
2009-05-10 標(biāo)簽:A/D 1140
DS278x電量計(jì)電流失調(diào)寄存器(COB)的校準(zhǔn)
摘要:DS278x系列獨(dú)立式電量計(jì)為可充電鋰離子電池或鋰聚合物電池提供了精確估算剩余電量的方法。該系列電量計(jì)內(nèi)置電流失調(diào)(COB)寄存器,設(shè)計(jì)人員可以利用它來消除IC電流ADC所引...
2009-05-09 標(biāo)簽:DS278x 2039
如何在DS2784中存儲(chǔ)電量計(jì)參數(shù)
摘要:DS2784允許用戶根據(jù)實(shí)際應(yīng)用的確切要求和所用電池定制獨(dú)立式電量計(jì)。眾所周知,常用參數(shù)的單位為mA、V、mAhrs和mΩ。而DS2784保存參數(shù)時(shí)對(duì)單位的要求是µV,µVhrs和mhos...
2009-05-09 標(biāo)簽:DS2784 3865
單線串行總線載體隔離的電源和數(shù)據(jù)-Single-Wire S
Abstract: An interface circuit uses the Dallas Semiconductor 1-Wire serial bus to provide isolated power and bidirectional communications between a master (MCU) and a sensing element. Medical and industrial applications o...
2009-05-08 標(biāo)簽:總線 1228
存放電池電量計(jì)DS2780參數(shù)-Storing Batter
Abstract: The DS2780 allows the user to customize the stand-alone battery fuel gauge to the exact requirements of the application and the cell being used. The parameters required are typically known in units such as mA, V, mAhrs, and mΩ. ...
2009-05-08 標(biāo)簽:DS2780 5886
SHA iButton Secrets and Challe
Abstract: Several applications use the Dallas SHA iButton® tokens for eCash, vending, fare collection, and user authentication. They require the use of secrets to recognize authentic tokens and to secure data and monetary values agains...
2009-05-08 標(biāo)簽:Button 937
常用詞匯的高速數(shù)據(jù)轉(zhuǎn)換器條款-Glossary of Fre
Abstract: The glossary provides a detailed description of AC performance terms related to high-speed data converters such as ADCs and DACs. It also gives some insight into the test conditions these parameters are specified for. ...
2009-05-08 標(biāo)簽:轉(zhuǎn)換器 916
飛兆半導(dǎo)體實(shí)現(xiàn)效率高達(dá)94%的電源參考設(shè)計(jì)
飛兆半導(dǎo)體實(shí)現(xiàn)效率高達(dá)94%的電源參考設(shè)計(jì) 在消費(fèi)應(yīng)用中降低噪聲并保護(hù)敏感電路飛兆半導(dǎo)體公司 (Fairchild Semiconductor) 推出 200W DC-DC ...
2009-05-08 標(biāo)簽: 780
FAN9612 功率因數(shù)校正(PFC) 控制器
飛兆半導(dǎo)體交錯(cuò)式臨界導(dǎo)通PFC控制器,為綠色電源提供超過96%的效率 采用最小封裝尺寸實(shí)現(xiàn)業(yè)界最佳的轉(zhuǎn)換器保護(hù)功能 飛兆半導(dǎo)體公司(Fairchild Sem...
2009-05-08 標(biāo)簽:PFC 1445
運(yùn)算放大器關(guān)鍵術(shù)語
摘要:本術(shù)語表收集了運(yùn)算放大器的術(shù)語和規(guī)格參數(shù),為設(shè)計(jì)人員提供一個(gè)簡便的參考指南。 本文介紹了在運(yùn)算放大器(op amp)數(shù)據(jù)資料的Electrical Characteristics表格中列出...
2009-05-08 標(biāo)簽: 540
Low-Power 3V ADC is 0.05% Line
Abstract: This application note describes using a microcontroller (µC) with integrated digital-to-analog converter (DAC) and comparitors to create a low cost ADC that is 0.05% linear. The simple 3V analog-to-digital...
2009-05-08 標(biāo)簽:adc 1118
Low-Cost Sample/Hold Includes
Properly connected, a quad-SPDT analog switch and op amp (Figure 1 form a sample/hold circuit. The circuit economizes during operation by switching the op amp from input to output, thereby buffering the input (VIN) during sample mode and b...
2009-05-08 標(biāo)簽:IC 1586
Current-Limit Switch Is Digita
Abstract: Current-limit switches are virtually ubiquitous in system controls. They provide a safe means for regulating the current delivered to a load circuit. The switches allow the load current to increase to a programmed limit but no hi...
2009-05-08 標(biāo)簽:current 3408
Two ICs Convert 4-20mA Signal
Abstract: This design idea describes a simple circuit that converts a 4-20mA signal to a 0V to 5V analog voltage ideal for conversion to digital with an analog-to-digital converter (ADC). The 4mA level from the transducer produces a 0V out...
理解集成的ADC-Understanding Integra
Abstract: Integrating analog-to-digital converters (ADCs) provide high resolution analog-to-digital conversions, with good noise rejection. These ADCs are ideal for digitizing low bandwidth signals, and are used in applications such as dig...
2009-05-08 標(biāo)簽:adc 1383
實(shí)際數(shù)據(jù)采集使用Windows 的電能表-Practical
Abstract: This application note describes the design of a PC-based, 14-bit data acquisition system. It takes a system approach, includes all the necessary building blocks: analog, digital, hardware, and software. It discusses each step, te...
2009-05-08 標(biāo)簽:WINDOWS 1074
如何解釋DS1852溫度和電壓讀-How to Interp
Abstract: The DS1852 is a digital potentiometer with five analog inputs that can be used in conjunction with the potentiometers to gather feedback information about an analog system, as well as provide analog control functions. Its intende...
2009-05-08 標(biāo)簽:DS1852 1001
ADC的一種簡單的熱敏電阻接口-A Simple Therm
Abstract: This article describes a simple and cost effective method of measuring temperature using a thermistor connected in a half-bridge configuration. The goal is to perform a ratiometric measurement such that the VREF source voltage to...
2009-05-08 標(biāo)簽:adc 2397
介紹DS1847用于工業(yè)控制-Introduction of
Abstract: This application note introduces the DS1847 and DS1848, dual digital temperature-controlled variable resistors, to the industrial controls market. By temperature compensating the resistors, the resistors can either remain at a sp...
2009-05-08 標(biāo)簽:DS1847 1205
再生的DS1847/DS1848電阻校準(zhǔn)常數(shù)-Regener
Abstract: The purpose of this application note is to show how the DS1847/48 digital resistor calibration constants can be regenerated. This application note assumes that the reader is familiar with the Programming the Lookup Table section ...
溫度監(jiān)測使用MAX1253/54和MAX1153/54-Te
Abstract: The MAX1253/54 and MAX1153/54 system monitors are a low cost solution for monitoring multiple temperatures in a system. This application note explains how to measure temperature using remote sensing diodes in single-ended or diff...
2009-05-08 標(biāo)簽:MAX1253 1110
電路實(shí)現(xiàn)基于PC的電壓測量-Circuit Enables
Abstract: In its simplest form, the PC voltmeter consists of a 4-channel, 10-bit A/D converter (IC2) with a few passive components, connected to the PC printer port via a 25-pin male D-type connector. In its simplest form...
2009-05-08 標(biāo)簽:PC 617
高頻電源模塊的驅(qū)動(dòng)電路的設(shè)計(jì)與研究
1、驅(qū)動(dòng)電路的基本要求 一個(gè)理想的IGBT驅(qū)動(dòng)電路應(yīng)具有以下基本性能: (1)動(dòng)態(tài)驅(qū)動(dòng)能力強(qiáng),能為IGBT柵極提供具有陡峭前后沿的驅(qū)動(dòng)電壓脈沖; (2)IGBT...
2009-05-07 標(biāo)簽:電源 1370
PLC在可控硅直流調(diào)速系統(tǒng)中的應(yīng)用設(shè)計(jì)
可控硅直流調(diào)速系統(tǒng)控制的發(fā)展,經(jīng)歷了分立元件和集成運(yùn)放兩代模擬控制電路,最終由PLC數(shù)字程控所代替。前兩種在實(shí)踐應(yīng)用時(shí),普遍存在由于設(shè)計(jì)問題...
2009-05-07 標(biāo)簽:可控硅 1330
采用DSP的電源控制系統(tǒng)的軟硬件開發(fā)
1 引言 隨著現(xiàn)代電力電子技術(shù)的不斷進(jìn)步和信息技術(shù)的發(fā)展,逆變電源越來越廣泛的應(yīng)用于通訊、航海、航空、醫(yī)療、軍事等諸多領(lǐng)域,同時(shí)用戶對(duì)...
2009-05-07 標(biāo)簽:電源 1367
電路實(shí)現(xiàn)基于PC的電壓測量-Circuit Enables
Abstract: In its simplest form, the PC voltmeter consists of a 4-channel, 10-bit A/D converter (IC2) with a few passive components, connected to the PC printer port via a 25-pin male D-type connector. In its simplest form...
Simple Methods Reduce Input Ri
Abstract: Charge pumps are a form of DC-DC converter that rely on capacitors instead of inductors for energy storage and transfer. The absence of inductors makes them attractive in situations requiring a low-power auxiliary supply (output ...
2009-05-07 標(biāo)簽:charge 2148
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