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(shí)間: 2022-02-11
上傳用戶:
IP2726_AC_FBR 是一款集成多種協(xié)議、用于 USB-A 和 TYPE-C 雙端口輸出的快充協(xié)議 IC。支持多 種快充協(xié)議,包括 USB TypeC DFP,PD2.0/PD3.0/PPS , HVDCP QC4+/QC4/QC3.0/QC2.0(Quick Charge),F(xiàn)CP (Hisilicon? fast Charge Protocol),SCP(Super fast Charge),AFC(Samsung? Adaptive fast Charge), MTK PE+ 2.0/1.1( MediaTek Pump Express Plus 2.0/1.1),Apple 2.4A,BC1.2 以及 2.0A。為適 配器、車充等單向輸出應(yīng)用提供完整的 TYPE-C 解決 方案。 IP2726_AC_FBR 具備高集成度與豐富功能,在 應(yīng)用時(shí)僅需極少的外圍器件,有效減小整體方案的 尺寸,降低 BOM 成本。
標(biāo)簽: usb
上傳時(shí)間: 2022-02-24
上傳用戶:xsr1983
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(huì)有太 大的變動(dòng),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(gè)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(gè) 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(huì)面對(duì):1000 倍的數(shù)據(jù)容量增長(zhǎng),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(zhǎng)的電池續(xù)航時(shí)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(chǎng)。 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(huì)有 太大的變動(dòng),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(shí)間: 2022-02-25
上傳用戶:20125101110
IP2723T 是一款集成多種協(xié)議、用于 USB 輸出 端口的快充協(xié)議 IC。支持多種快充協(xié)議,包括 USB TypeC DFP , PD2.0/PD3.0/PPS , HVDCP QC4/QC4+/QC3.0/QC2.0 ( Quick Charge ), FCP (Hisilicon? fast Charge Protocol),SCP(Super fast Charge),AFC(Samsung? Adaptive fast Charge), MTK PE+ 2.0/1.1(MediaTek Pump Express Plus 2.0/1.1),Apple 2.4A,BC1.2 以及三星 2.0A。為適 配器、車充等單向輸出應(yīng)用提供完整的 TYPE-C 解決 方案。
標(biāo)簽: IP2723
上傳時(shí)間: 2022-03-04
上傳用戶:
對(duì)某四輪獨(dú)立驅(qū)動(dòng)電動(dòng)汽車輪轂電機(jī)進(jìn)行研究,設(shè)計(jì)一種永磁無刷直流電機(jī)控制器.以STM32F103RBT6芯片為基礎(chǔ),對(duì)電機(jī)驅(qū)動(dòng)電路、采樣電路和保護(hù)電路分別進(jìn)行硬件設(shè)計(jì)與分析;同時(shí),采用模塊化軟件設(shè)計(jì)方案,對(duì)該控制器的軟件系統(tǒng)進(jìn)行升級(jí).實(shí)驗(yàn)驗(yàn)證表明:所設(shè)計(jì)的電機(jī)控制器能使電機(jī)響應(yīng)迅速、轉(zhuǎn)速穩(wěn)定、無超調(diào),且電動(dòng)車動(dòng)力輸出性能良好.A permanent magnet brushless direct current motor controller was designed by studying the hub motor of a four-wheel independent drive electric vehicle.Based on STM32 F103RBT6 chip,the hardware design and analysis of motor drive circuit,sampling circuit and protection circuit were carried out respectively.At the same time,modular software design scheme was adopted to upgrade the software system of the controller.Experimental results show that the designed motor controller can ensure the motor fast response,stable speed,no overshoot,and good power output performances.
標(biāo)簽: 電動(dòng)汽車 永磁無刷直流電機(jī)
上傳時(shí)間: 2022-03-26
上傳用戶:qingfengchizhu
以AT89S52單片機(jī)為控制核心,采用電容降壓技術(shù),Buck電路拓?fù)?PWM驅(qū)動(dòng)模塊和功率器件散熱設(shè)計(jì),通過高速的數(shù)據(jù)采集、主功率輸入輸出模塊和控制模塊,設(shè)計(jì)一種新型智能車載充電器.在充電過程中,通過負(fù)脈沖瞬間放電實(shí)現(xiàn)對(duì)鉛酸蓄電池的再生修復(fù),提高電池的有效容量,延長(zhǎng)使用壽命.該充電器體積小、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.
標(biāo)簽: 車載充電器
上傳時(shí)間: 2022-03-27
上傳用戶:
特點(diǎn):o ARM? Cortex?-M4 CPU 平臺(tái)o 高達(dá)150MHz 的高性能Cortex?-M4 處理器o 集成FPU 和MPUo 內(nèi)存o 512KB 片上SRAMo 2KB 至512KB 可編程保持存儲(chǔ)區(qū)o 閃存o 1MB 集成閃存o 原地執(zhí)行NOR 閃存接口,在閃存中執(zhí)行時(shí)接近0 等待狀態(tài)o 供電和復(fù)位管理系統(tǒng)o 片上穩(wěn)壓器,支持1.7V-3.6V 輸入o 上電復(fù)位(POR)o 時(shí)鐘管理o 10-30MHz 晶體振蕩器o 內(nèi)部16MHz RCo 32kHz 晶體振蕩器o 內(nèi)部32kHz RCo 具有可編程輸出頻率的低功耗PLLo 通用DMA:具有硬件流控制的8 通道DMA 控制器o 安全o 使用TRNG(真隨機(jī)數(shù)發(fā)生器)的簡(jiǎn)單加密引擎o 定時(shí)器/計(jì)數(shù)器o 1x 系統(tǒng)節(jié)拍定時(shí)器o 4x 32 位定時(shí)器o 1x 看門狗定時(shí)器o 功耗(待確認(rèn))o 滿載:待定uA/MHz @ 25°Co 運(yùn)行:待定uA /MHz @ 25°Co 停止:待定@ 25°Co 保留:待定@ 25°C,32kB 保留存儲(chǔ)器o 待機(jī):待定@ 25°C,內(nèi)部32kHz RCo 12 位逐次逼近寄存器(SAR)ADCo 每秒最多2M 樣本o 可通過8:1 多路復(fù)用器選擇輸入o 1 個(gè)帶有集成PHY 的USB 2.0 高速雙角色端口o 兩個(gè)SD / SDIO 主機(jī)接口o SD/SDIO 2.0 模式:時(shí)鐘高達(dá)50MHzo LCD 控制器o 分辨率高達(dá)480x320o 6800 和8080 異步模式(8 位)o JTAG 調(diào)試功能o 3 個(gè)PWM(6 個(gè)輸出),3 個(gè)捕捉和3 個(gè)QEP 模塊o 4x UART,帶有HW 流控制,最高可達(dá)4Mbpso 3x I2C,支持fast Mode+(1000kbps)o 2x I2S 接口o 3x SPI 主器件高達(dá)25MHz,1x SPI 從器件高達(dá)10MHzo 32 個(gè)GPIOo 68 引腳QFN 封裝o 溫度范圍:-40 至85°C4.1 帶FPU 內(nèi)核的ARM?CORTEX?-M4帶有FPU 處理器的ARM?Cortex?-M4 是一款32 位RISC 處理器,具有出色的代碼和功率效率。它支持一組DSP 指令,以允許高效執(zhí)行信號(hào)處理算法,非常適合于可穿戴和其他嵌入式市場(chǎng)。集成的單精度FPU(浮點(diǎn)單元)便于重用第三方庫(kù),從而縮短開發(fā)時(shí)間。內(nèi)部?jī)?nèi)存保護(hù)單元(MPU)用于管理對(duì)內(nèi)的訪問,以防止一個(gè)任務(wù)意外破壞另一個(gè)活動(dòng)任務(wù)使用的內(nèi)存。集成緊密耦合的嵌套向量中斷控制器,提供多達(dá)16 個(gè)優(yōu)先級(jí)。4.2 系統(tǒng)內(nèi)存Bock 包含512kB 零等待狀態(tài)SRAM,非常適合于當(dāng)今算法日益增長(zhǎng)的需求。同時(shí),內(nèi)存被細(xì)分為更小的區(qū),從而可以單獨(dú)地關(guān)閉以降低功耗。4.3 閃存和XIP 單元提供1MB 的集成NOR 閃存,以支持CPU 直接執(zhí)行。為了提高性能,XIP 單元具有集成的緩存系統(tǒng)。緩沖內(nèi)存與系統(tǒng)內(nèi)存共享。與從系統(tǒng)內(nèi)存運(yùn)行性能相比,XIP 單元使得許多應(yīng)用程序的運(yùn)行接近100%。4.4 ROM集成ROM 固件包含通過NOR 閃存正常引導(dǎo)所需的引導(dǎo)加載程序,支持用于批量生產(chǎn)的閃存編程,還包括用于調(diào)試目的的UART 和USB 啟動(dòng)功能。
標(biāo)簽: tg401
上傳時(shí)間: 2022-06-06
上傳用戶:qdxqdxqdxqdx
Mathematical modeling has become an important part of the research and devclopment work in engineering and scicnce. Retaining a competitive edge requiresa fast path between ideas and prototypes, and in this regard mathematical modeling and simulation provide a valuable shortcut for understanding both qualitative and quantitative aspects of scientific and engineering design. To assist you in gaining this edge, COMSOL Multiphysics offers state-of-the art performance, being built from the ground up with a Java3D interface and C/C++ solvers.The Acoustics Module is an optional package that extends the COMSOL Multiphysicsmodcling cnvironment with customized user interfaces and functionality optimizcd for the analysis of acoustics. Like all modules in the COMSOL family, it provides a brary of prewritten ready-to-run models that make it quicker and casier to analyze disciplinc-specific problcms.
上傳時(shí)間: 2022-06-19
上傳用戶:
In this presentation, we will look at what the Serial Peripheral Interface, otherwise known as the SPI, is. and how it is used to communicate data to and from the PICmicro microcontroller.SPl is frequently used when few 1/O lines are available, but communication between two or more devices must be fast and easy to implement.In this presentation, we will discuss the following topics: We will first cover an Overview of SPI This section of the tutorial will introduce you to SPI and its concepts.Next, we will examine the use of SPI on the PICmicro MCU.The details of how SPI is implemented on a PICmicro device will be examined.Then, a Code Walkthrough will be given.The walkthough will explore code for both an SPI Master and SPI Slave. The example will have the Master generate data for sending to the slave.Finally, there will be a few resources given at the end of the presentation. These resources will allow you to explore in more detail the SPI interface
標(biāo)簽: spi協(xié)議
上傳時(shí)間: 2022-06-20
上傳用戶:
Datasheet SHT3x-DISHumidity and Temperature Sensor? Fully calibrated, linearized, and temperaturecompensated digital output? Wide supply voltage range, from 2.4 V to 5.5 V? I2C Interface with communication speeds up to 1MHz and two user selectable addresses? Typical accuracy of ? 2 %RH and ? 0.3 °C? Very fast start-up and measurement time? Tiny 8-Pin DFN package
上傳時(shí)間: 2022-06-29
上傳用戶:
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