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(cè)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。
低電壓故障保護(hù)
摘要：本應(yīng)用筆記討論過壓保護(hù)在連接系統(tǒng)電路的開關(guān)和復(fù)用器中的必要性。MAX4711/MAX4712/MAX4713模擬開關(guān)工作在2.7V至11V，集成了故障保護(hù)功能。本文還介紹了其它幾種故障保護(hù)方案...
2009-04-29 標(biāo)簽：電壓 1633
Add Fault Protection to 4-20mA
Abstract: This circuit provides flexible fault protection for a 4-20mA current loop. In addition, it includes circuitry for recovering digital signals (such as the HART protocol) imposed on the loop. 4-20mA current loops ...
One Button Turns Microprocesso
Abstract: Combining a low-dropout (LDO) linear regulator with an OR gate produces a circuit that allows a single pushbutton to turn a microprocessor-based portable system on and off. When placing a microprocessor-based po...
2009-04-29 標(biāo)簽：Microproce 1387
電源備份開關(guān)-Power-Backup Switch
Abstract: A microprocessor-supervisor IC and two external MOSFET switches form a low-voltage backup power supply that can provide several amperes when the main supply fails. Every subsystem in an electronic product depend...
盡量減少短路電流脈沖的熱插拔控制器-Minimize Sho
Abstract: Because of internal circuit-breaker delay and limited MOS-gate pulldown current, many hot-swap controllers do not limit current during the first 10µs to 50µs following a shorted output. The result can be a brief flow ...
Series Protection for Power-Li
Abstract: This application note describes a circuit that protects an n-channel power MOSFET against low and high voltages. It includes a high-side switch-driver IC and fast-response, 3-transistor, overvoltage detector. Vo...
2009-04-29 標(biāo)簽：Power-Line 1135
并聯(lián)穩(wěn)壓器提高功率放大器的電流限制精度-Shunt Regu
Abstract: Substituting a shunt regulator (U1) for the usual transistor in this power-amplifier circuit improves the current-limit accuracy. Adding current-limiting circuitry to an emitter follower protects both the pass t...
2009-04-29 標(biāo)簽：穩(wěn)壓器 1692
隔離式電源電信應(yīng)用-Isolated Power Suppl
Abstract: Simple easy to use high side current sense amps protects power supplies as a result of irregular supply voltage caused by short-circuit conditions. To ensure compliance with all international standards, the desi...
規(guī)格與測(cè)量機(jī)振蕩器噪聲集成電路基站混頻器-Specifica
Abstract: Residual phase noise from local oscillators (LO) can be degraded by additive noise of on-chip local oscillator drivers/buffers in integrated circuit mixers. Reciprocal mixing of strong RF signals with the LO noise degrades the re...
2009-04-29 標(biāo)簽：振蕩器 751
簡單電力場(chǎng)效應(yīng)管驅(qū)動(dòng)器是孤立的和DC耦合-Simple Po
Abstract: An isolated transformer-driver IC (MAX845) and small external transformer produce an isolated gate-control signal for a power FET. Designers of power electronic circuits must often drive power switches that feed...
2009-04-29 標(biāo)簽：驅(qū)動(dòng)器 946
CCFL推挽式緩沖電路
摘要：DS3984, DS3988, DS3881, DS3882, DS3992和DS3994為冷陰極熒光燈(CCFL)控制器，它們使用推挽結(jié)構(gòu)來產(chǎn)生驅(qū)動(dòng)熒光燈所需的高壓交流波形。在推挽式驅(qū)動(dòng)器中，升壓變壓器的寄生電感與n溝...
2009-04-29 標(biāo)簽：CCFL 2785
修改MAX2010電路使其工作在450MHz
摘要：本應(yīng)用筆記說明如何對(duì)MAX2010 (可調(diào)節(jié)RF預(yù)失真器)標(biāo)準(zhǔn)評(píng)估板進(jìn)行下蓋，使其工作頻率優(yōu)化在450Hz。默認(rèn)情況下，預(yù)失真器工作在500MHz至1000MHz，但是，對(duì)MAX2010評(píng)估板稍做修改，...
2009-04-29 標(biāo)簽：MAX2010 654
修改MAX2010電路使其工作在360MHz
摘要：本應(yīng)用筆記說明如何對(duì)MAX2010 (可調(diào)節(jié)RF預(yù)失真器)標(biāo)準(zhǔn)評(píng)估板進(jìn)行下蓋，使其工作頻率優(yōu)化在360Hz。默認(rèn)情況下，預(yù)失真器工作在500MHz至1100MHz，但是，對(duì)MAX2010評(píng)估板稍做修改，...
2009-04-29 標(biāo)簽：MAX2010 861
DS1870采用外接電阻時(shí)的調(diào)節(jié)范圍/分辨率
摘要：DS1870用于射頻(RF)功率放大器偏置控制，如果不接外部電阻，采用5V基準(zhǔn)，其偏置電壓范圍為3V至5V。本應(yīng)用筆記旨在展示如何利用外接電阻達(dá)到適當(dāng)?shù)姆秶头直媛??？梢岳?..
利用DS4303為LDMOS RF功率放大器提供偏置
摘要：LDMOS RF功率放大器因其極高的性價(jià)比在GSM和CDMA基站市場(chǎng)占據(jù)了主導(dǎo)地位。使用LDMOS放大器時(shí)，保證高性能的一個(gè)關(guān)鍵因素是補(bǔ)償柵極偏置電壓，以在溫度變化時(shí)保持恒定的靜態(tài)...
2009-04-28 標(biāo)簽：放大器 1082
數(shù)字可調(diào)電壓基準(zhǔn)源-Digitally Adjustable
A digitally adjustable voltage reference is useful in many applications. For instance, it can be used to finely tune the reference voltage when absolute accuracy is required or to adjust the reference voltage to match the full-scale voltag...
在便攜式應(yīng)用中數(shù)字調(diào)整的DC-DC轉(zhuǎn)換器輸出電壓
There are many portable applications that optimize circuit performance by adjusting the output voltage of a DC-DC converter. For instance, many microprocessors can operate at a low voltage to save power, and then operate at a high voltage ...
2009-04-28 標(biāo)簽：轉(zhuǎn)換器 1700
利用數(shù)字電位器的調(diào)節(jié)降壓DC-DC轉(zhuǎn)換器設(shè)計(jì)-Using D
Abstract: This application note describes how to use a digital potentiometer to generate an adjustable voltage supply using a MAX1776 step-down DC-DC converter. A reference design using the DS3903 is shown that features the ability to prod...
2009-04-28 標(biāo)簽： 2501
利用DS1841對(duì)數(shù)電阻優(yōu)化雪崩光電二極管(APD)的偏置范
摘要：本文闡述了如何使用DS1841對(duì)數(shù)電位器調(diào)節(jié)APD偏置電路的輸出范圍。為了使調(diào)節(jié)過程更簡單，本文還提供了電子數(shù)據(jù)表。 APD偏置電路DS1841可受溫度控制的...
2009-04-28 標(biāo)簽：電阻 884
Inexpensive Peak Detector Feat
Abstract: This circuit, which uses a digital potentiometer (pot) and a comparator, features droopless operation that is not normally associated with peak detectors that have traditionally used rectifiers and sample-and-holds (S/H). ...
數(shù)模轉(zhuǎn)換器應(yīng)用-Force/Sense DAC Applic
Abstract: This article discusses application circuits for Maxim force/sense digital-to-analog converters (DACs). Applications include: selectable fixed-gain DAC, programmable gain DAC, photodiode bias control, amperometric sensor control, ...
2009-04-28 標(biāo)簽：轉(zhuǎn)換器 1886
利用數(shù)字電位器實(shí)現(xiàn)按鍵保持控制
摘要：許多裝置需要一個(gè)用戶接口來調(diào)整溫度、背光強(qiáng)度和電源電壓等，這個(gè)用戶接口需要能夠避免按鍵調(diào)整中的誤操作。若在這些裝置中使用一個(gè)數(shù)字電位器，設(shè)計(jì)人員可以通過...
2009-04-28 標(biāo)簽：電位器 864
半導(dǎo)體數(shù)字電位器：常見問題
Abstract: This application note answers frequently asked questions for Dallas Semiconductor digital potentiometers. How do I set up the DS1267 in stacked configuration?Connect the H0 terminal to the L1 terminal...
2009-04-28 標(biāo)簽： 905
求戴維等效電路的EPOT基于偏置電阻網(wǎng)絡(luò)
Additional Information: EPOT Applications: Offset Adjustment in Op-Amp Circuits To model the network shown below in Figure 1 as the Thevenin equivalent shown below in Figure 2, find the Thevenin Voltage (Vth) and the Thevenin Resis...
2009-04-28 標(biāo)簽：EPOT 1090
Creating Non-Linear Transfer F
Abstract: Linear digital potentiometers (pots) can be used in non-linear applications such as adjusting volume control in audio applications. This article discusses how to create a "pseudo-logarithmic" taper digital pot by simply adding a ...
2009-04-28 標(biāo)簽：電位器 770
控制變壓電源使用DS1809-Controlling a V
Abstract: Semiconductor topic: Many linear and switched-mode power supplies and voltage regulators use a resistor network as feedback into the regulator to adjust the voltage output. This is typically done either by varying the values of t...
2009-04-28 標(biāo)簽：電源 1253
2-Wire Controlled Digital DIP
Abstract: The DS3904 contains three digitally controlled nonvolatile (NV) variable resistors. It has the capability of placing each of the variable resistors into a high-impedance state. Using this feature, it is possible to create a 2-wir...
2009-04-28 標(biāo)簽：Switch 1381
External Resistor Minimizes Di
Abstract: This article discusses how to improve linearity (due to loading of the wiper) and mid-range frequency response of a digital potentiometer in VCO control applications by adding a single external resistor between H and W. ...
2009-04-28 標(biāo)簽：Resistor 1671
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