精確度0.05%滿刻度±1位數(shù)（Accuracy 0.05%F.S.±1digit） 可測量交直流電流/交直流電壓/電位計/傳送器/Pt-100/荷重元/電阻等信號（Measuring DCA/DCV/ACA/ACV/Potentiometer/Transmitter/Pt-100/Load Cell/Resistor/etc……） 顯示范圍0-19999可任意規(guī)劃（Programmable rate 0 to 1999 digit） 小數(shù)點可任意規(guī)劃（Decimal point can be modified） 尺寸小，穩(wěn)定性高（Dimension small & High stability）
上傳時間： 2014-01-25
上傳用戶：RQB123
The CN3052A is a complete constant-current /constant voltage linear charger for single cell Li-ion and Li Polymer rechargeable batteries. The device contains an on-chip power MOSFET and eliminates the need for the external sense resistor and blocking diode.
上傳時間： 2013-11-10
上傳用戶：子虛烏有
Abstract: It is critically important that lithium-ion battery stacks have a good battery-management system for monitoring many cellvoltages and cell temperatures. Without that monitoring, thermal runaway can lead to a battery explosion. This design idea presentsa low-power circuit that measures the temperature of up to 12 thermistors. It powers and configures the multiplexers, and also putsthe muxes into shutdown to save power when not measuring temperatures.
標簽： 電池管理系統(tǒng) 多點 溫度測量 方案
上傳時間： 2013-10-29
上傳用戶：xwd2010
Piezoelectric motors are used in digital cameras for autofocus,zooming and optical image stabilization. Theyare relatively small, lightweight and effi cient, but theyalso require a complicated driving scheme. Traditionally,this challenge has been met with the use ofseparatecircuits, including a step-up converter and an oversizedgeneric full-bridge drive IC. The resulting high componentcount and large board space are especially problematicin the design of cameras for ever shrinking cell phones.The LT®3572 solves these problems by combining astep-up regulator and a dual full-bridge driver in a 4mm× 4mm QFN package. Figure 1 shows a typical LT3572Piezo motor drive circuit. A step-up converter is usedto generate 30V from a low voltage power source suchas a Li-Ion battery or any input power source within thepart’s wide input voltage range of 2.7V to 10V. The highoutput voltage of the step-up converter, adjustable upto 40V, is available for the drivers at the VOUT pin. Thedrivers operate in a full-bridge fashion, where the OUTAand OUTB pins are the same polarity as the PWMA andPWMB pins, respectively, and the OUTA and OUTB pinsare inverted from PWMA and PWMB, respectively. Thestep-up converter and both Piezo drivers have their ownshutdown control. Figure 2 shows a typical layout
上傳時間： 2013-11-18
上傳用戶：hulee
Advances in low power electronics now allow placementof battery-powered sensors and other devices in locationsfar from the power grid. Ideally, for true grid independence,the batteries should not need replacement, but instead berecharged using locally available renewable energy, suchas solar power. This Design Note shows how to producea compact battery charger that operates from a small2-cell solar panel. A unique feature of this design is thatthe DC/DC converter uses power point control to extractmaximum power from the solar panel.
上傳時間： 2014-01-20
上傳用戶：wettetw
The LTC®4155 and LTC4156 are dual multiplexed-inputbattery chargers with PowerPath™ control, featuring I2Cprogrammability and USB On-The-Go for systems suchas tablet PCs and other high power density applications.The LTC4155’s float voltage (VFLOAT) range is optimizedfor Li-Ion batteries, while the LTC4156 is optimized forlithium iron phosphate (LiFePO4)batteries, supportingsystem loads to 4A with up to 3.5A of battery chargecurrent. I2C controls a broad range of functions and USBOn-The-Go functionality is controlled directly from theUSB connector ID pin.
標簽： 高電流 便攜式產(chǎn)品 電池充電器 方案
上傳時間： 2013-10-09
上傳用戶：hanhanj
The design of battery-powered equipment can often bequite challenging. Since few ICs can operate directly fromthe end-of-life voltage from a 2-cell battery (about 1.8V),most systems require a DC/DCconverter. The systemdesigner often has a limited area in which to place the DC/DC converter; associated inductors and capacitors must be
上傳時間： 2013-11-23
上傳用戶：wys0120
Portable, battery-powered operation of electronic apparatushas become increasingly desirable. Medical, remotedata acquisition, power monitoring and other applicationsare good candidates for batteryoperation. In some circumstances,due to space, power or reliability considerations,it is preferable to operate the circuitry from a single 1.5Vcell. Unfortunately, a 1.5V supply eliminates almost alllinear ICs as design candidates. In fact, the LM10 opamp-reference and the LT®1017/LT1018 comparators arethe only IC gain blocks fully specifi ed for 1.5V operation.Further complications are presented by the 600mV dropof silicon transistors and diodes. This limitation consumesa substantial portion of available supply range, makingcircuit design diffi cult. Additionally, any circuit designedfor 1.5V operation mustfunction at end-of-life batteryvoltage, typically 1.3V. (See Box Section, “Componentsfor 1.5V Operation.”)
標簽： Circuitry Operation Single Cell
上傳時間： 2013-10-30
上傳用戶：hz07104032
ØCPV is the abbreviation of concentration PV. Ø It utilizes optics to concentrate the sunlight to the CPV cell to generate power. Ø The purpose of CPV is to reduce the cell’s area and the cost of PV module.
上傳時間： 2013-10-29
上傳用戶：開懷常笑
一、變壓器Np、Ns、Lp的計算二、如果要計算氣隙長度Lg三、開關管Vce、Ic的計算（非連續(xù)）五.輸出整流二極管Id、Vd的計算Flyback輸出濾波電容設計流過輸出電容C的紋波電流Ic=I2- Io 其中：I2為次級線圈電流 Ic的有效值可由下式計算：Icrms=[Ton/3T(I2p^2-I2pIo+Io^2 )+(Toff/T)* Io^2]^1/2 其中I2p=2io/(1- δmax) 此為輸入電壓最低、輸出功率最大時狀態(tài)。
上傳時間： 2013-11-22
上傳用戶：aesuser
