特点(FEATURES) 精确度0.1%满刻度 (Accuracy 0.1%F.S.) 可作各式数学演算式功能如:A+B/A-B/AxB/A/B/A&B(Hi Or Lo)/|A| (Math functioA+B/A-B/AxB/A/B/A&B(Hi&Lo)/|A|/etc.....) 16 BIT 类比输出功能(16 bit DAC isolating analog output function) 输入/输出1/输出2绝缘耐压2仟伏特/1分钟(Dielectric strength 2KVac/1min. (input/output1/output2/power)) 宽范围交直流两用电源设计(Wide input range fOr auxiliary power) 尺寸小,稳定性高(Dimension small and High stability)
上传时间： 2013-11-24
上传用户：541657925
Abstract: A resistive feedback netwOrk is often used to set the output voltage of a power supply. A mechanical potentiometer (pot)conveniently solves the problem of adjusting a power supply. FOr easier automatic calibration, a mechanical pot can be replaced witha digital pot. This application note presents a calibration solution that uses a digital pot, because digipots are smaller, do not movewith age Or vibration, and can be recalibrated remotely. This proposed solution reduces the susceptibility of the system to thetolerance of the digital pot's end-to-end resistance, making the solution optimal fOrdesigners. This application note also explainssome of the equations required to calculate the resistOr chain values and to use a digital pot in this way. A spreadsheet withstandard reisistOr values is available fOr easy calculations.
上传时间： 2013-10-31
上传用户：caiguoqing
Abstract: Rail splitting is creating an artificial virtual ground as a reference voltage. It is used to set the signalto match the op amp's "sweet spot." An op amp has the most linear- and distOrtion-free qualities at that sweetspot. Typically, the sweet spot occurs near the center between the single power rail and ground. In the case ofa number of signals, the virtual ground can control channel DC errOrs when multiplexing Or switching thesignals.
上传时间： 2013-10-23
上传用户：wushengwu
Abstract: Some types of loads require mOre current during startup than when running. Other loads can be limited to a lower-powercurrent during startup but require a higher operating current. This article describes an application circuit that automatically adjusts apower circuit’s overcurrent protection level up Or down after startup is complete.
上传时间： 2013-10-23
上传用户：swaylong
Sensing and/Or controlling current flow is a fundamental requirement in many electronics systems, and the tech-niques to do so are as diverse as the applications them-selves.
标签： 电流采样
上传时间： 2013-10-15
上传用户：daoyue
Power over Ethernet (PoE) is a new development thatallows fOr the delivery of power to Ethernet-based devicesvia standard Ethernet CAT5 cable, precluding the need fOrwall adapters Or other external power sources. The PoEspecification defines a hardware detection protocol wherePower Sourcing Equipment (PSE) is able to identify PoEPowered Devices (PDs), thus allowing full backwardscompatibility with non-PoE-aware (legacy) Ethernetdevices.
上传时间： 2013-11-11
上传用户：daoyue
Linear Technology offers a variety of devices that simplifyconverting power from a USB cable, but the LTC®3455represents the highest level of functional integration yet. The LTC3455 seamlessly manages power flowbetween an AC adapter, USB cable and Li-ion battery,while complying with USB power standards, all from a4mm × 4mm QFN package. In addtion, two high efficiencysynchronous buck converters generate low voltage railswhich most USB-powered peripherals require. TheLTC3455 also provides power-on reset signals fOr themicroprocessOr, a Hot SwapTM output fOr poweringmemOry cards as well as an uncommitted gain blocksuitable fOr use as a low-battery comparatOr Or an LDOcontroller. The PCB real estate required fOr the entire USBpower control circuit and two DC/DC converters is only225mm2.
上传时间： 2013-11-02
上传用户：名爵少年
Multiple-voltage electronics systems often requirecomplex supply voltage tracking Or sequencing, whichif not met, can result in system faults Or even permanentfailures in the fi eld. The design diffi culties in meetingthese requirements are often compounded in distributedpowerarchitectures where point-of-load (POL) DC/DCconverters Or linear regulatOrs are scattered across PCboard space, sometimes on different board planes. Theproblem is that power supply circuitry is often the lastcircuitry to be designed into the board, and it must beshoehOrned into whatever little board real estate is left.Often, a simple, drop-in, fl exible solution is needed tomeet these requirements.
上传时间： 2013-10-08
上传用户：15071087253
Advancements in board assembly, PCB layout anddigital IC integration have produced a new generationof densely populated, high perfOrmance systems. Theboard-mounted point-of-load (POL) DC/DC power suppliesin these systems are subject to the same demandingsize, high power and perfOrmance requirements asother subsystems. The rigOrous new POL demands aredifficult to meet with traditional controller Or regulatOrICs, Or power modules.
上传时间： 2014-12-24
上传用户：lbbyxmraon
A number of conventional solutions have been available fOrthe design of a DC/DC converter where the output voltageis within the input voltage range—a common scenarioin Li-Ion battery-powered applications—but none werevery attractive until now. Conventional topologies, suchas SEPIC Or boost followed by buck, have numerousdisadvantages, including low effi ciency, complex magnetics,polarity inversion and/Or circuit complexity/cost. TheLTC®3785 buck-boost controller yields a simple, effi cient,low parts-count, single-converter solution that is easyto implement, thus avoiding the drawbacks associatedwith traditional solutions.
上传时间： 2013-10-21
上传用户：ljt101007
