PW1555 is a programmable current limit switch with input voltage range selection and outputvoltage clamping. Extremely low RDS(ON) of the integrated protection N-channel FET helps toreduce power loss during the normal operation. Programmable soft-start time controls the slew rateof the output voltage during the start-up time. Independent enable control allows the complicatedsystem sequencing control. It integrates the over-temperature protection shutdown andautorecovery with hystersis
标签： pw1555
上传时间： 2022-02-14
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高清电子书-C++ Primer Plus, 第6版英文版 1438页Learning C++ is an adventure of discovery, particularly because the language accommodates several programming paradigms, including object-oriented programming, generic programming, and the traditional procedural programming.The fifth edition of this book described the language as set forth in the ISO C++ standards, informally known as C++99 and C++03, or, sometimes as C++99/03. (The 2003 version was largely a technical correction to the 1999 standard and didn’t add any new features.) Since then, C++ continues to evolve.As this book is written, the international C++ Standards Committee has just approved a new version of the standard.This standard had the informal name of C++0x while in development, and now it will be known as C++11. Most contemporary compilers support C++99/03 quite well, and most of the examples in this book comply with that standard. But many features of the new standard already have appeared in some implementations, and this edition of C++ Primer Plus explores these new features. C++ Primer Plus discusses the basic C language and presents C++ features, making this book self-contained. It presents C++ fundamentals and illustrates them with short, to-the-point programs that are easy to copy and experiment with.You learn about input/output (I/O), how to make programs perform repetitive tasks and make choices, the many ways to handle data, and how to use functions.You learn about the many features C++ has added to C, including the followi
标签： C++
上传时间： 2022-02-19
上传用户：trh505
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
Single chip TFT-LCD Controller/Driver with On-chip Frame Memory (FM) Display Resolution: 240*RGB (H) *320(V) Frame Memory Size: 240 x 320 x 18-bit = 1,382,400 bits LCD Driver Output Circuits- Source Outputs: 240 RGB Channels- Gate Outputs: 320 Channels- Common Electrode Output Display Colors (Color Mode)- Full Color: 262K, RGB=(666) max., Idle Mode Off- Color Reduce: 8-color, RGB=(111), Idle Mode On Programmable Pixel Color Format (Color Depth) for Various Display Data input Format- 12-bit/pixel: RGB=(444)- 16-bit/pixel: RGB=(565)- 18-bit/pixel: RGB=(666) MCU Interface- Parallel 8080-series MCU Interface (8-bit, 9-bit, 16-bit & 18-bit)- 6/16/18 RGB Interface(VSYNC, HSYNC, DOTCLK, ENABLE, DB[17:0])- Serial Peripheral Interface(SPI Interface)- VSYNC Interface
上传时间： 2022-03-04
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M.NT68676.2A is a monitor control board, which is suitable for Asia-Pacific market. It can supportLED/LCD panels which resolution is up to 2048×1152.M.NT68676.2A can synchronize with computer automatically. Synchronization requires thesynchronous signal which horizontal and vertical sync are separated.M.NT68676.2A can support dynamic contrast control, headphone input and Digital volume controlsimultaneously.
标签： 乐华驱动板
上传时间： 2022-03-13
上传用户：kent
能源短缺和环境恶化是人类共同面临的挑战。开发新型清洁能源是解决能源短缺和环境恶化的捷径，但是太阳能能源不连续和不稳定的缺点影响其单独使用的效果。为了解决这个问题，可以选择使用多种性质互补的能源联合供电，相互弥补彼此的不足，以达到连续稳定的电能输出。基于双输入直流变换器（Multipk-Input Converter，MC）的光电互补系统相对于风光互补系统而言，在太阳能功率充足时，可以选择将多余的能量进行并网，省去了蕃电池等储能设备，也可大大节约成本，简化控制：而且电网是全天候的，比纯新能源联合系统更加可靠。因此本文将对光电互补系统，研究其拓扑、能量管理和系统参数设计等等在隔离应用的中小功率场合，推挽变换器控制方便，结构简单，应用广泛传统的多输入推挽变换器结构复杂，成本高。通过分析MIC的生成方法，利用脉冲电压源 Pulsating Voltage Source Ce，PⅤSC或者脉冲电流源（Pulsating Curren Source Cell，PCSC）中联或者并联构成简单实用的一族多输入推挽变换器，详细分析了BUCK型PVSC串联构成的双输入推挽变换器的小信号模型和控制方式，为了能够提供交流输出，本文还详细分析了半桥逆变电路的控制方式，并推导出其数学控制模型通过分析系统的工作模式、能量管理策略和不同控制方式对系统的影响，阐叨基于双输入推挽变换器的光电互补系统的工作原理。并对系统软件涉及到的太阳能最大功率跟踪、光电互补控制和逆变控制等算法进行重点研究功率电路参数设计合理与否，直接影响着系统的性能和指标，其中推挽变压器和滤波器的参数设计尤为重要，为此专门给出了硬件参数设计步骤；然后，根据软件算法，设计了控制软件流程图来更清晰的表达软件控制的思想软件参数是影响系统鲁棒性和快速性的另一个关键因素，在硬件设计的基础上，对软件参数进行优化设计，并利用 Simulink软件对设计参数进行仿真分析和修正。然后采用TMS320F2809作为控制芯片，搭建了实验原理样机，并进行了相关验证实验
标签： 推挽变换器
上传时间： 2022-03-16
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电子书-RTL Design Style Guide for Verilog HDL540页A FF having a fixed input value is generated from the description in the upper portion of Example 2-21. In this case, ’0’ is output when the reset signal is asynchronously input, and ’1’ is output when the START signal rises. Therefore, the FF data input is fixed at the power supply, since the typical value ’1’ is output following the rise of the START signal. When FF input values are fixed, the fixed inputs become untestable and the fault detection rate drops. When implementing a scan design and converting to a scan FF, the scan may not be executed properl not be executed properly, so such descriptions , so such descriptions are not are not recommended. recommended.[1] As in the lower part of Example 2-21, be sure to construct a synchronous type of circuit and ensure that the clock signal is input to the clock pin of the FF. Other than the sample shown in Example 2-21, there are situations where for certain control signals, those that had been switched due to the conditions of an external input will no longer need to be switched, leaving only a FF. If logic exists in a lower level and a fixed value is input from an upper level, the input value of the FF may also end up being fixed as the result of optimization with logic synthesis tools. In a situation like this, while perhaps difficult to completely eliminate, the problem should be avoided as much as possible.
标签： RTL verilog hdl
上传时间： 2022-03-21
上传用户：canderile
以AT89S52单片机为控制核心,采用电容降压技术,Buck电路拓扑,PWM驱动模块和功率器件散热设计,通过高速的数据采集、主功率输入输出模块和控制模块,设计一种新型智能车载充电器.在充电过程中,通过负脉冲瞬间放电实现对铅酸蓄电池的再生修复,提高电池的有效容量,延长使用寿命.该充电器体积小、速度快、效率高、可靠性好.With AT89S52 single chip computer as the control core,a new type of intelligent car-carried charger was designed by using capacitance step-down technology,Buck circuit topology,PWM driving module and power device heat dissipation design,through high-speed data acquisition,main power input and output module and control module.In the charging process,the regeneration and repair of lead-acid batteries are realized by instantaneous discharge of negative pulse,which improves the effective capacity of batteries and prolongs their service life.The charger has the advantages of small size,fast speed,high efficiency and good reliability.
标签： 车载充电器
上传时间： 2022-03-27
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在半导体制冷技术的工作性能及其优缺点研究的基础上,设计了以单片机为核心控制元件,以TEC1-12706为执行元件的半导体制冷温度控制系统。采用高精度分段式PID控制算法配合PWM输出控制的方法实现温度控制;选择数字传感器DS18B20为温度检测元件,还包含1602液晶显示模块、按键调整输入模块和H桥驱动模块等。实际测试表明,该系统结构简单易行,操作方便,工作性能优良,同时针对该系统专门设计的温控算法,使半导体制冷器能更好地适应不同工况而充分发挥其制冷制热工作特性。Based on the study of the performance and advantages and disadvantages of thermoelectric cooler(TEC)technology,a thermoelectric cooling temperature control system with single-chip microcomputer as the core control element and TEC1-12706 as the executive element was designed. High precision piecewise PID control algorithm combined with PWM output control method is adopted to realize temperature control. The digital sensor DS18B20 is selected as the temperature detection element. It also includes 1602 LCD module,key adjustment input module and H bridge drive module. The actual test shows that the system has simple structure,convenient operation and excellent performance. Meanwhile,the temperature control algorithm specially designed for the system can make the semiconductor cooler better adapt to different working conditions and give full play to its refrigeration and heating characteristics.
上传时间： 2022-03-27
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设计了自动控制系统综合实验案例“基于LabVIEW和单片机的温度控制系统设计”。实验系统硬件部分由单片机、温度传感器、D/A转换模块、调压模块和电烤箱组成,设计了单片机与各个模块之间的接口电路。软件部分采用LabVIEW软件实现控制算法,并设计监控界面实现参数设定、温度数据实时监控等功能。设计了单片机与LabVIEW软件之间的串口通信程序,实现了输入、输出数据的传输。通过综合实验系统设计,使学生得到控制系统设计和实验调试等综合能力的训练。A comprehensive experimental case of the automatic control system is presented,which is the design of the temperature control system based on LabVIEW and SCM.The hardware part of the experimental system is composed of the SCM,temperature sensor,D/A conversion module,voltage regulating module and electric oven.The interface circuit between the SCM and each module is designed.In the software part,LabVIEW software is used to realize the control algorithm,and the monitoring interface is designed to realize the functions of parameter setting,temperature data real-time monitoring,etc.The serial communication program between the SCM and LabVIEW software is designed to realize the transmission of input and output data.Through the design of this comprehensive experimental system,students can get the comprehensive ability training for the control system design,experiment debugging,etc.
上传时间： 2022-03-27
上传用户：qdxqdxqdxqdx
