PW2205 develops a high efficiency synchronous step-down DC-DC converter capable of delivering5A output current. PW2205 operates over a wide input voltage range from 4.5V to 30V andintegrates main switch and synchronous switch with very low RDS(ON) to minimize the conductionloss.PW2205 adopts the instant PWM architecture to achieve fast transient responses for high step downapplications and high efficiency at light loads. In addition, it operates at pseudo-constant frequencyof 500kHz under continuous conduction mode to minimize the size of inductor and capacitor
標(biāo)簽： pw2205
上傳時間： 2022-02-11
上傳用戶：
The PW2163D is a high frequency, synchronous, rectified, step-down, switch-mode converter withinternal powerMOSFETs. It offers a very compact solution to provide a 3A continuous current over awide input supply range,with excellent load and line regulation.The PW2163D requires a minimal number of readily available, external components and is availablein a spacesaving SOT23-6 package
標(biāo)簽： pw2163d
上傳時間： 2022-02-11
上傳用戶：
The PW2163 is a high efficiency 500 kHz synchronous step-down DC-DC converter capable ofdelivering 3A current. The PW2163 operates over a wide input voltage range from 4.5V to 18V andintegrates main switch and synchronous switch with very low RDS(ON) to minimize the conductionloss. Low output voltage ripple and small external inductor and capacitor sizes are achieved with 500kHz switching frequency. It adopts the instant PWM architecture to achieve fast transient responsesfor high step down applications
標(biāo)簽： pw2163
上傳時間： 2022-02-11
上傳用戶：
The PW2053 is a high-efficiency monolithic synchronous buck regulator using a constantfrequency, current mode architecture. The device is available in an adjustable version. Supply currentwith no load is 40uA and drops to <1uA in shutdown. The 2.5V to 5.5V input voltage range makesthe PW2053 ideally suited for single Li-Ion battery powered applications. 100% duty cycle provideslow dropout operation, extending battery life in portable systems. PWM/PFM mode operationprovides very low output ripple voltage for noise sensitive applications. Switching frequency isinternally set at 1.2MHz, allowing the use of small surface mount inductors and capacitors. Lowoutput voltages are easily supported with the 0.6V feedback reference voltage
標(biāo)簽： pw2053
上傳時間： 2022-02-14
上傳用戶：jason_vip1
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
標(biāo)簽： pw1555
上傳時間： 2022-02-14
上傳用戶：
高清電子書-C++ Primer Plus, 第6版英文版 1438頁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
標(biāo)簽： C++
上傳時間： 2022-02-19
上傳用戶：trh505
解讀 5G 八大關(guān)鍵技術(shù) 【摘要】5G 不是一次革命，5G 是 4G 的延續(xù)，我相信 5G 在核心網(wǎng)部分不會有太 大的變動，5G 的關(guān)鍵技術(shù)集中在無線部分。 在進(jìn)入主題之前，我覺得首先應(yīng)該弄清楚一個問題：為什么需要 5G？不是因 為通信工程師們突然想改變世界，而炮制了一個 5G。是因?yàn)橄扔辛诵枨螅庞辛?5G。什么需求？ 未來的網(wǎng)絡(luò)將會面對：1000 倍的數(shù)據(jù)容量增長，10 到 100 倍的無線設(shè)備連接， 10 到 100 倍的用戶速率需求，10 倍長的電池續(xù)航時間需求等等。坦白的講，4G 網(wǎng)絡(luò)無法滿足這些需求，所以 5G 就必須登場。 但是，5G 不是一次革命。5G 是 4G 的延續(xù)，我相信 5G 在核心網(wǎng)部分不會有 太大的變動，5G 的關(guān)鍵技術(shù)集中在無線部分。雖然 5G 最終將采用何種技術(shù)，目前 還沒有定論。不過，綜合各大高端論壇討論的焦點(diǎn)，我今天收集了 8 大關(guān)鍵技術(shù)。 當(dāng)然，應(yīng)該遠(yuǎn)不止這些。 1.非正交多址接入技術(shù) （Non-Orthogonal Multiple Access,NOMA） 我們知道 3G 采用直接序列碼分多址（Direct Sequence CDMA ，DS-CDMA） 技術(shù)，手機(jī)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)來解決手機(jī)和小區(qū)之間的遠(yuǎn)-近問題。 而 4G 網(wǎng)絡(luò)則采用正交頻分多址（
標(biāo)簽： 5G
上傳時間： 2022-02-25
上傳用戶：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
上傳時間： 2022-03-04
上傳用戶：
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.
標(biāo)簽： 樂華驅(qū)動板
上傳時間： 2022-03-13
上傳用戶：kent
能源短缺和環(huán)境惡化是人類共同面臨的挑戰(zhàn)。開發(fā)新型清潔能源是解決能源短缺和環(huán)境惡化的捷徑，但是太陽能能源不連續(xù)和不穩(wěn)定的缺點(diǎn)影響其單獨(dú)使用的效果。為了解決這個問題，可以選擇使用多種性質(zhì)互補(bǔ)的能源聯(lián)合供電，相互彌補(bǔ)彼此的不足，以達(dá)到連續(xù)穩(wěn)定的電能輸出。基于雙輸入直流變換器（Multipk-Input Converter，MC）的光電互補(bǔ)系統(tǒng)相對于風(fēng)光互補(bǔ)系統(tǒng)而言，在太陽能功率充足時，可以選擇將多余的能量進(jìn)行并網(wǎng)，省去了蕃電池等儲能設(shè)備，也可大大節(jié)約成本，簡化控制：而且電網(wǎng)是全天候的，比純新能源聯(lián)合系統(tǒng)更加可靠。因此本文將對光電互補(bǔ)系統(tǒng)，研究其拓?fù)洹⒛芰抗芾砗拖到y(tǒng)參數(shù)設(shè)計等等在隔離應(yīng)用的中小功率場合，推挽變換器控制方便，結(jié)構(gòu)簡單，應(yīng)用廣泛傳統(tǒng)的多輸入推挽變換器結(jié)構(gòu)復(fù)雜，成本高。通過分析MIC的生成方法，利用脈沖電壓源 Pulsating Voltage Source Ce，PⅤSC或者脈沖電流源（Pulsating Curren Source Cell，PCSC）中聯(lián)或者并聯(lián)構(gòu)成簡單實(shí)用的一族多輸入推挽變換器，詳細(xì)分析了BUCK型PVSC串聯(lián)構(gòu)成的雙輸入推挽變換器的小信號模型和控制方式，為了能夠提供交流輸出，本文還詳細(xì)分析了半橋逆變電路的控制方式，并推導(dǎo)出其數(shù)學(xué)控制模型通過分析系統(tǒng)的工作模式、能量管理策略和不同控制方式對系統(tǒng)的影響，闡叨基于雙輸入推挽變換器的光電互補(bǔ)系統(tǒng)的工作原理。并對系統(tǒng)軟件涉及到的太陽能最大功率跟蹤、光電互補(bǔ)控制和逆變控制等算法進(jìn)行重點(diǎn)研究功率電路參數(shù)設(shè)計合理與否，直接影響著系統(tǒng)的性能和指標(biāo)，其中推挽變壓器和濾波器的參數(shù)設(shè)計尤為重要，為此專門給出了硬件參數(shù)設(shè)計步驟；然后，根據(jù)軟件算法，設(shè)計了控制軟件流程圖來更清晰的表達(dá)軟件控制的思想軟件參數(shù)是影響系統(tǒng)魯棒性和快速性的另一個關(guān)鍵因素，在硬件設(shè)計的基礎(chǔ)上，對軟件參數(shù)進(jìn)行優(yōu)化設(shè)計，并利用 Simulink軟件對設(shè)計參數(shù)進(jìn)行仿真分析和修正。然后采用TMS320F2809作為控制芯片，搭建了實(shí)驗(yàn)原理樣機(jī)，并進(jìn)行了相關(guān)驗(yàn)證實(shí)驗(yàn)
標(biāo)簽： 推挽變換器
上傳時間： 2022-03-16
上傳用戶：
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