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。
High-Side Current-Sense Amplif
Abstract: This circuit modifies a standard 32V high-side current monitor to measure load current (to 30mA) while accommodating any level of high voltage, subject to limitations in the external components. (The components shown allow measur...
2009-05-06 標(biāo)簽：Current-Se 2072
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...
2009-05-06 標(biāo)簽：Overcurren 1041
電流限制電路的降壓穩(wěn)壓器-Current-Limit Cir
Abstract: This article demonstrates how to achieve current limit for the MAX1692 PWM step-down regulator by using a MAX4173H current-sense amplifier. Additional Information: Quick View Data Sheet for the MAX16...
High-Accuracy Current-Sense Am
Abstract: Current sharing between DC/DC converter modules enables several modules to be paralleled. In recent years, tight tolerances for current sharing have made discrete current-sense circuit designs a formidable challenge. This applica...
2009-05-06 標(biāo)簽：Current-Se 1535
高側(cè)電流傳感器輸出周期-High-Side Current
Abstract: The MAX4374 high-side current sense amplifier with two internal comparators is used to produce a pulse-width output signal proportional to the current being sensed. This simple circuit eliminates the need for a discrete A/D conve...
Practical Data Acquisition usi
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...
2009-05-06 標(biāo)簽：Power 1527
混合電路驅(qū)動(dòng)器的類型和數(shù)量的LED-Circuit Driv
Portable systems often use LEDs of different colors-white for the display backlight, green for keypad illumination, red for power, etc., and in varying quantities of each. Typically the LEDs are driven by at least two power supplies, one f...
2009-05-06 標(biāo)簽：led驅(qū)動(dòng)器 931
新增高電壓能力的MAX471/MAX472高側(cè)電流檢測(cè)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 ...
新的功率檢測(cè)電流斷路器
摘要：大多數(shù)情況下電路斷路器是檢測(cè)電流。例如，保險(xiǎn)絲，當(dāng)電路超過它的限值時(shí), 它靠切斷電流來保護(hù)電路。對(duì)于恒定DC或RMS電源電壓...
精密監(jiān)視負(fù)電源電流的電路
摘要：該電流檢測(cè)電路監(jiān)視負(fù)電源，并提供一個(gè)正比于負(fù)載電流的正輸出電壓。 在一個(gè)高可靠系統(tǒng)中，電源電流監(jiān)視通常是一項(xiàng)必備功能，因?yàn)殡娏鬟^大會(huì)給系統(tǒng)造成...
高可靠性系統(tǒng)中電流檢測(cè)的實(shí)際考慮
摘要：電流檢測(cè)最簡(jiǎn)單的方法是依據(jù)歐姆定律：電阻兩端的壓降和流過電阻的電流成正比。本文討論了基于電阻的電流檢測(cè)在實(shí)際設(shè)計(jì)中的問題，列舉了一些典型實(shí)例，如：電流保...
2009-05-06 標(biāo)簽：電流 681
用兩個(gè)單向電流檢測(cè)放大器組成一個(gè)雙向電流檢測(cè)放大器
摘要：許多電池電流監(jiān)測(cè)應(yīng)用中需要雙向電流檢測(cè)功能，以測(cè)量電池的充電和放電電流。本文介紹了怎樣用兩個(gè)單向電流檢測(cè)放大器，比如MAX4172和MAX4173，組成一個(gè)雙向電流檢測(cè)放大...
簡(jiǎn)單的、輸出鎖定的過流故障檢測(cè)器，具有快速的響應(yīng)時(shí)間
摘要：本文介紹了一個(gè)簡(jiǎn)單、具有快速響應(yīng)時(shí)間的過流故障檢測(cè)器，用于低壓系統(tǒng)的電路保護(hù)。該方案與專用的熱插拔控制器不同，專用的熱插拔控制器跳出欠壓狀態(tài)后往往具有較...
2009-05-06 標(biāo)簽：檢測(cè)器 1284
帶有輸入串聯(lián)電阻的電流檢測(cè)放大器的性能
摘要：本篇應(yīng)用筆記闡述了高邊電流檢測(cè)放大器的性能特性。本文論述了在放大器的檢測(cè)輸入端如何使用串聯(lián)電阻。該設(shè)計(jì)方法特別適用于需要對(duì)高壓線路上檢測(cè)電阻兩端的小信號(hào)...
2009-05-06 標(biāo)簽：串聯(lián)電阻 1067
Extend Current-Sense Amplifier
Abstract: Adding a charge pump provides ±5V supply rails to the operational amplifier internal to a high-side current-sense amplifier. This modification enables that amplifier to sense currents down to 0V common-mode inputs. The circuit c...
2009-05-06 標(biāo)簽：Current-Se 1607
利用0至1V模擬乘法器實(shí)現(xiàn)電池供電系統(tǒng)的精確功率管理
摘要：有些系統(tǒng)要求測(cè)量輸出到負(fù)載的功率，這比通過傳統(tǒng)的電流檢測(cè)放大器簡(jiǎn)單測(cè)量電流更為重要。負(fù)載功率測(cè)量可以精確管理電池或交流適配器供電設(shè)備的功率。該應(yīng)用筆記顯...
2009-05-06 標(biāo)簽：乘法器 1742
采用簡(jiǎn)單的穩(wěn)壓電路為高邊電流監(jiān)測(cè)器提供恒定電壓
摘要：在典型的光電二極管電流監(jiān)測(cè)應(yīng)用中，電流監(jiān)測(cè)器和雪崩光電二極管(APD)之間的壓降隨溫度和電流而變化，由此改變了總增益。本應(yīng)用筆記介紹了一種利用穩(wěn)壓電路保持電流檢...
2009-05-06 標(biāo)簽：電路監(jiān)測(cè)器 775
利用精密儀表放大器實(shí)現(xiàn)負(fù)壓電流檢測(cè)
摘要：ISDN、電信等系統(tǒng)需要一個(gè)負(fù)壓電流檢測(cè)放大器。本應(yīng)用筆記介紹了一種設(shè)計(jì)負(fù)壓電流檢測(cè)放大器的方法。這種方法非常靈活，經(jīng)過簡(jiǎn)單修改即可用于不同的負(fù)壓電流檢測(cè)。本...
2009-05-06 標(biāo)簽：放大器 1151
模擬乘法器提高高邊電流檢測(cè)的測(cè)量精度
摘要：將模擬乘法器和高邊電流檢測(cè)放大器相結(jié)合，能夠在筆記本電腦或其它便攜儀器中實(shí)現(xiàn)電池充、放電電流的測(cè)量。本文討論將模/數(shù)轉(zhuǎn)換器(ADC)的基準(zhǔn)電壓加到模擬乘法器的一...
2009-05-06 標(biāo)簽：電流 857
半導(dǎo)體切換開關(guān)-Semiconductor Toggle S
Abstract: A low-power circuit formed with resistors, capacitors, a pushbutton switch, and two comparators serves as a toggle switch that directly drives loads up to 40mA, providing a known state following power up, battery insertion, or sy...
電路簡(jiǎn)單雙打輸入頻率-Simple Circuit Doub
Abstract: A simple circuit consisting of a comparator and an exclusive-OR gate is sufficient to double the frequency of a reference signal. The versatile phase-locked loop (PLL) allows multiplication of a reference freque...
2009-05-06 標(biāo)簽：頻率 1588
Light Is On When Power Is Out
Abstract: A loss of AC power during darkness (sensed by a photoresistor) turns on an array of battery-powered white LEDs. To conserve power, a timer turns off the LEDs after a particular period of time (for example, 10 minutes). ...
2009-05-06 標(biāo)簽：Power 1083
閱讀隔離數(shù)字國家的電力消耗-Read Isolated Di
Abstract: A simple circuit employs a small transformer and latched comparator to sense the state of a digital line without drawing power from the line. Electronic systems must often isolate their inputs or outputs from th...
2009-05-06 標(biāo)簽：電力 784
建立比較器的外部滯回電壓
摘要：長期以來, 模擬比較器的使用一直處在它的“同伴”――運(yùn)算放大器的陰影之中。設(shè)計(jì)人員發(fā)表了大量針對(duì)運(yùn)算放大器的應(yīng)用筆記, 而關(guān)于比較器的應(yīng)用筆記較少。正是由于缺...
2009-05-06 標(biāo)簽：電壓 1432
微電路的正電源電流監(jiān)視器-Micropower Circui
Abstract: The following application note shows a circuit that converts the load current of a positive power supply into a ground referenced signal voltage using the ICL7612 operational amplifier. The inexpensive circuit o...
2009-05-06 標(biāo)簽：監(jiān)視器 1074
pFET線性穩(wěn)壓低壓差-pFET Linear Regula
P-channel MOSFETs (pFETs), though more expensive than pnp transistors, are free of the dissipation loss associated with base drive in a pnp circuit. pFETs also have a lower saturation voltage at light loads (Figure 1). In fact, the low RDS...
2009-05-06 標(biāo)簽：pFET 1713
升壓轉(zhuǎn)換器具有較高的輕負(fù)載效率-Boost Converte
In most DC-DC converters, the normal supply currents do not allow high efficiency at low load currents. The circuit in Figure 1, however, contains micropower components that enable it to maintain 90% efficiency for load currents as low as ...
2009-05-06 標(biāo)簽：轉(zhuǎn)換器 1149
EPOT應(yīng)用：偏移調(diào)整的運(yùn)算放大器電路-EPOT Appli
Abstract: In some electronic systems, a DC offset voltage at the inputs will contribute a significant error to the output. This is especially true in high gain configurations. An offset adjustment circuit can be added to "null" out the off...
2009-05-06 標(biāo)簽：放大器 1019
EPOT應(yīng)用：增益調(diào)整的運(yùn)算放大器電路-EPOT Appli
Variable gain amplifiers often use a mechanical potentiometer to set the gain. An example is a volume control dial. However, when the analog signal path is digitally controlled, a digital potentiometer might be used to control gain. This a...
2009-05-06 標(biāo)簽：放大器 675
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