ABSTRACTThe flyback power stage is a popular choice for single and multiple output dc-to-dc converters at powerlevels of 150 Watts or less. Without the output inductor required in buck derived topologies, such as theforward or push-pull converter, the component count and cost are reduced. This application note will reviewthe design procedure for the power stage and control electronics of a flyback converter. In these isolatedconverters, the error signal from the secondary still needs to cross the isolation boundary to achieveregulation. By using the UC3965 Precision Reference with Low Offset Error Amplifier on the secondaryside to drive an optocoupler and the UCC3809 Economy Primary Side Controller on the primary side, asimple and low cost 50 Watt isolated power supply is realized.
标签： 隔离
上传时间： 2021-11-24
上传用户：kingwide
General Design Specification:1. AC Input Range 180-264Vac, Isolated ac-dc offline, 12LEDS,Output 700mA2. Intelligent wall dimmer detections(Leading-edge dimmer , Trailing-edgedimmer , No-dimmer)3. Multiple dimming control scheme4. Wide dimming range from 1% up to 100%5. No visible flicker6. Resonant control to achieve high efficiency7. High Power Factor, 0.9 without dimmer8. Temperature degrade control to adjust the LED9. Primary-only Sensing eliminates opto-isolator feedback and simplifies design
标签： iw3617
上传时间： 2021-12-03
上传用户：canderile
GPC 系列直流电源供应器是一部携带式可调整的多功能仪器，特别设计应用在电源操作的放大器，逻辑线路，正负电压误差非常小的精密仪器系统的追踪上，或需要用到三组独立电源的单体线路上，可称得上是一部非常实用又方便的仪器。GPC 系列主要由两组相同、独立、可调整的直流电源供应器组成，从前面板的 TRACKING 选择开关可选择三种模式：独立输出、串联输出和并联输出。在独立模式(INDEP)状态时，二组主控(MASTER)、副控(SLAVE)输出电压、电流为独立分离输出，而其输出端子到机壳或主控(MASTER)输出端子到副控(SLAVE)输出端子的隔离度(ISOLATED)有 300V。当在追踪模式(TRACKING)状态时，主控输出端与副控输出端会自动的连接成串联模式(SERIES)或并联模式(PARALLEL)，不需另外从输出端接任何导线；在串联模式时，调整主控输出电压(+)即有等量的副控电压(-)输出；并联模式时，调整主控输出电流，则主控输出端即有二倍的电流量输出。
标签： 电源
上传时间： 2022-02-08
上传用户：
The PW5300 is a current mode boost DC-DC converter. Its PWM circuitry with built-in 0.2Ω powerMOSFET make this regulator highly power efficient. The internal compensation network alsominimizes as much as 6 external component counts. The non-inverting input of error amplifierconnects to a 0.6V precision reference voltage and internal soft-start function can reduce the inrushcurrent. The PW5300 is available in the SOT23-6L package and provides space-saving PCB for theapplication fields
标签： pw5300
上传时间： 2022-02-11
上传用户：jiabin
Agilent 34401A Service Guide.pdfIEC Measurement Category II includes electrical devices connected to mains at an outlet on a branch circuit. Such devices include most small appliances, test equipment, and other devices that plug into a branch outlet or socket. The 34401A may be used to make measurements with the HI and LO inputs connected to mains in such devices, or to the branch outlet itself (up to 300 VAC). However, the 34401A may not be used with its HI and LO inputs connected to mains in permanently installed electrical devices such as the main circuit-breaker panel, sub-panel disconnect boxes, or permanently wired motors. Such devices and circuits are subject to overvoltages that may exceed the protection limits of the 34401A. Note: Voltages above 300 VAC may be measured only in circuits that are isolated from mains. However, transient overvoltages are also present on circuits that are isolated from mains. The Agilent 34401A are designed to safely withstand occasional transient overvoltages up to 2500 Vpk. Do not use this equipment to measure circuits where transient overvoltages could exceed this level. Additional Notices Waste Electrical and Electronic Equipment (WEEE) Directive 2002/96/EC This product complies with the WEEE Directive (2002/96/EC) marking requirement. The affixed product label (see below) indicates that you must not discard this electrical/electronic product in domestic household waste. Product Category: With reference to the equipment types in the WEEE directive Annex 1, this product is classified as a "Monitoring and Control instrumentation" product. Do not dispose in domestic household waste. To return unwanted products, contact your local Agilent office, or see www.agilent.com/environment/product for more information. Agilent 34138A Test Lead Set The Agilent 34401A is compatible with the Agilent 34138A Test Lead Set described below. Test Lead Ratings Test Leads - 1000V, 15A Fine Tip Probe Attachments - 300V, 3A Mini Grabber Attachment - 300V, 3A SMT Grabber Attachments - 300V, 3A Operation The Fine Tip, Mini Grabber, and SMT Grabber attachments plug onto the probe end of the Test Leads. Maintenance If any portion of the Test Lead Set is worn or damaged, do not use. Replace with a new Agilent 3413
标签： agilent
上传时间： 2022-02-20
上传用户：
解读 5G 八大关键技术 【摘要】5G 不是一次革命，5G 是 4G 的延续，我相信 5G 在核心网部分不会有太 大的变动，5G 的关键技术集中在无线部分。 在进入主题之前，我觉得首先应该弄清楚一个问题：为什么需要 5G？不是因 为通信工程师们突然想改变世界，而炮制了一个 5G。是因为先有了需求，才有了 5G。什么需求？ 未来的网络将会面对：1000 倍的数据容量增长，10 到 100 倍的无线设备连接， 10 到 100 倍的用户速率需求，10 倍长的电池续航时间需求等等。坦白的讲，4G 网络无法满足这些需求，所以 5G 就必须登场。 但是，5G 不是一次革命。5G 是 4G 的延续，我相信 5G 在核心网部分不会有 太大的变动，5G 的关键技术集中在无线部分。虽然 5G 最终将采用何种技术，目前 还没有定论。不过，综合各大高端论坛讨论的焦点，我今天收集了 8 大关键技术。 当然，应该远不止这些。 1.非正交多址接入技术 （Non-Orthogonal Multiple Access,NOMA） 我们知道 3G 采用直接序列码分多址（Direct Sequence CDMA ，DS-CDMA） 技术，手机接收端使用 Rake 接收器，由于其非正交特性，就得使用快速功率控制 （Fast transmission power control ，TPC)来解决手机和小区之间的远-近问题。 而 4G 网络则采用正交频分多址（
标签： 5G
上传时间： 2022-02-25
上传用户：20125101110
温度控制如今已成为当代社会研究的热点之一,而温度检测在现代设备参数检测中也是一项极其重要的技术,应用十分广泛。与传统的测温方法相比,红外测温方法具有时间短、精度高、使用简单方便等优点。本文以环境温度为被测对象,设计了以STC89C52单片机为控制中心的红外测温装置,能够实现对目标温度的实时采集、处理、显示和报警等功能。本设计主要是由STC89C52单片机、红外测温传感器、LCD1602液晶显示器、按键和蜂鸣器等部分组成,采用非接触的方式对目标温度进行实时检测。Temperature control has become one of the hotspots in contemporary social research,and temperature detection is an extremely important technology in modern equipment parameter detection.Compared with traditional method,the infrared temperature measuring method has advantages of short time,high precision and convenient operation,etc.This paper consider environment temperature as research objects and designs an infrared temperature measuring device which employs the STC89C52singlechipas-control center,and it can realize timely collection,processing,display and alarm function of the target temperature.The design is mainly composed of STC89C52 singlechip,infrared temperature sensor,LCD1602monitor,keys and buzzer,etc.This design detects the target temperature by non-contact method.
上传时间： 2022-03-27
上传用户：jiabin
本系统基于STM32单片机设计的非接触式电流检测控制系统,通过OPA548片将所给任意信号放大,由100Ω电阻和INA128芯片进行电流电压转换放大后,利用STM32单片机对获取的电压信号以0.488μs频率采样,利用STM32单片机的FFT库,获得信号的谐波信息。测量电流信号精准,该设计可广泛应用在以STM32单片机为核心控制器件的新型仪表中,性能精准且抗干扰能力强。This system is a non-contact current detection and control system based on STM32 single chip microcomputer. It amplifiesany signal through OPA548 chip, converts and amplifies the current and voltage by 100 Ω resistance and INA128 chip. The obtainedvoltage signal is sampled at the frequency of 0.488 μs by STM 32 single chip microcomputer, and the harmonic information of the signalis obtained by the FFT library of STM 32 single chip microcomputer. The measurement of current signal is accurate. This design can bewidely used in a new instrument with STM 32 single chip microcomputer as its core control device, with accurate performance and stronganti-interference capability.
上传时间： 2022-03-27
上传用户：
应用无迹卡尔曼滤波算法（UKF）进行锂电池的SOC估计,采用Thevenin二阶RC等效电路模型,对HPPC电池脉冲充放电实验数据进行Matlab处理,得到较为准确的模型.通过在Matlab中编写算法程序,对不同工况的估计值与实际值进行误差估算及对比分析,通过此算法进行SOC估计,得到该算法可有效降低系统误差并纠正SOC的初值偏差.The non trace Calman filter （UKF） is applied to the SOC estimation of lithium battery. The Thevenin two order RC equivalent circuit model is used to process the HPPC battery pulse charge discharge experimental data by Matlab processing, and a more accurate model is obtained. By writing algorithm program in Matlab, the error estimation and comparison analysis of the estimated value and actual value of different states are carried out, and the SOC estimation is carried out by this algorithm. The algorithm can effectively reduce the system error and correct the initial value deviation of the SOC.
标签： 卡尔曼滤波
上传时间： 2022-05-03
上传用户：默默
Vivado设计分为Project Mode和Non-project Mode两种模式，一般简单设计中，我们常用的是Project Mode。在本手册中，我们将以一个简单的实验案例，一步一步的完成Vivado的整个设计流程一、新建工程1、打开Vivado 2013.4开发工具，可通过桌面快捷方式或开始菜单中xilinx DesignTools-Vivado 2013.4下的Vivado 2013.4打开软件，开启后，软件如下所示：2、单击上述界面中Create New Project图标，弹出新建工程向导，点击Next.3、输入工程名称、选择工程存储路径，并勾选Create project subdirectory选项，为工程在指定存储路径下建立独立的文件夹。设置完成后，点击Next注意：工程名称和存储路径中不能出现中文和空格，建议工程名称以字母、数字、下划线来组成。4、选择RTL Project一项，并勾选Do not specifty sources at this time，勾选该选项是为了跳过在新建工程的过程中添加设计源文件。点击Next.IA5、根据使用的FPGA开发平台，选择对应的FPGA目标器件。（在本手册中，以xilinx官方开发板KC705为例，Nexys4开发板请选择Artix-7 XC7A100TCSG324-2的器件，即Family和Subfamily均为Artix-7，封装形式（Package）为cSG324，速度等级（Speed grade）为-1，温度等级（Temp Grade）为C）。点击Next6、确认相关信息与设计所用的的FPGA器件信息是否一致，一致请点击Finish，不一致，请返回上一步修改。二、设计文件输入1、如下图所示，点击Flow Navigator下的Project Manager->Add Sources或中间Sources中的对话框打开设计文件导入添加对话框。2、选择第二项Add or Create Design Sources，用来添加或新建Verilog或VHDL源文件，点击Next
标签： vivado
上传时间： 2022-05-28
上传用户：默默
