The PW4055 is a complete constant-current /constant-voltage linear charger for single cell lithiumion batteries.Its ThinSOT package and low external component count make the PW4055 ideallysuited for portable applications.Furthermore, the PW4055 is specifically designed to work within USBpower specifications.The PW4055 No external sense resistor is needed, and no blocking diode is required due to theinternal MOSFET architecture.Thermal feedback regulates the charge current to limit the dietemperature during high power operation or high ambient temperature. The charge voltage is fixedat 4.2V, and the charge current can be programmed externally with a single resistor. The PW4055automatically terminates the charge cycle when the charge current drops to 1/10th the programmedvalue after the final float voltage is reached. When the input supply (wall adapter or USB supply) isremoved, the PW4055 automatically enters a low current state, dropping the battery drain currentto less than 2μA. The PW4055 can be put into shutdown mode, reducing the supply current to 25μA.The BAT pin has a 7KV ESD(HBM) capability. Other features include charge current monitor, undervoltage lockout, automatic recharge and a status pin to indicate charge termination and the presenceof an input voltage
標簽: pw4055
上傳時間: 2022-02-11
上傳用戶:jason_vip1
The PW2601 is a charger front-end integrated circuit designed to provide protection to Li-ionbatteries from failures of charging circuitry. The device monitors the input voltage, battery voltageand the charging current to make sure all three parameters are operated in normal range. Thedevice will switch off internal MOSFET to disconnect IN to OUT to protect load when any of inputvoltage, output current exceeds the threshold. The Over temperature protection (OTP) functionmonitors chip temperature to protect the device. The PW2601 also can protect the system’sbattery from being over charged by monitors the battery voltage continuously. The deviceoperates like a linear regulator, maintaining a 5.1V output with input voltages up to the input overvoltage threshold.The PW2601 is available in DFN-2x2-8L package. Standard products are Pb-free and Halogenfree
標簽: pw2601
上傳時間: 2022-02-11
上傳用戶:
LT3095MPUDD雙通道低噪聲偏置發生器的典型應用電路凌力爾特公司 (Linear Technology Corporation) 推出雙通道 IC LT3095,該器件從單一輸入提供兩路非常低噪聲、低紋波的偏置電源。每個通道都納入了單片升壓型 DC/DC 轉換器,一個集成的超低噪聲和高 PSRR (電源抑制比) 線性穩壓器對該轉換器進行了后置穩壓。LT3095 在輸出電壓高達 20V 時提供高達 50mA 的連續輸出電流,總紋波和噪聲 <100μVP-P。該器件在 3V 至 20V 輸入電壓范圍內工作,從而可與多種電源兼容。 LT3095 的固定頻率、峰值電流模式升壓型 DC/DC 轉換器包括一個集成的 950mA 電源開關、肖特基二極管和內部頻率補償。開關頻率在 450kHz 至 2MHz 內可通過單個電阻器編程,或可同步至一個外部時鐘,因此允許使用纖巧的外部組件。結合緊湊的 3mm x 5mm QFN 封裝,LT3095 可提供簡單、占板面積緊湊、高效率的解決方案,適用于儀表放大器、RF 和數據轉換系統、以及其他低噪聲偏置應用。 LT3095 的線性穩壓器運用凌力爾特專有的電流源基準架構,從而提供了很多優勢,例如能夠用單個電阻器設定輸出電壓,帶寬、噪聲、PSRR 和負載調節性能基本上不受輸出電壓影響。集成輸出噪聲 (在 10Hz 至 100kHz 帶寬) 僅為 4μVRMS,而且在整個開關頻率范圍內 PSRR 超過70dB,從而使總的噪聲和紋波 <100μVP-P。線性穩壓器調節升壓型轉換器的輸出電壓,使其比線性穩壓器輸出電壓高 2V,從而優化了功耗、瞬態響應和 PSRR 性能。為了提高系統可靠性,LT3095 提供短路和熱保護,還為每個通道提供獨立和精確的使能 / UVLO 門限。微功率工作時,兩個 EN 引腳均被拉低。
標簽: 噪聲偏置發生器
上傳時間: 2022-02-15
上傳用戶:
解讀 5G 八大關鍵技術 【摘要】5G 不是一次革命,5G 是 4G 的延續,我相信 5G 在核心網部分不會有太 大的變動,5G 的關鍵技術集中在無線部分。 在進入主題之前,我覺得首先應該弄清楚一個問題: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。是因為先有了需求,才有了 5G。什么需求? 未來的網絡將會面對:1000 倍的數據容量增長,10 到 100 倍的無線設備連接, 10 到 100 倍的用戶速率需求,10 倍長的電池續航時間需求等等。坦白的講,4G 網絡無法滿足這些需求,所以 5G 就必須登場。 但是,5G 不是一次革命。5G 是 4G 的延續,我相信 5G 在核心網部分不會有 太大的變動,5G 的關鍵技術集中在無線部分。雖然 5G 最終將采用何種技術,目前 還沒有定論。不過,綜合各大高端論壇討論的焦點,我今天收集了 8 大關鍵技術。 當然,應該遠不止這些。 1.非正交多址接入技術 (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,手機接收端使用 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)來解決手機和小區之間的遠-近問題。 而 4G 網絡則采用正交頻分多址(
標簽: 5G
上傳時間: 2022-02-25
上傳用戶:20125101110
溫度控制如今已成為當代社會研究的熱點之一,而溫度檢測在現代設備參數檢測中也是一項極其重要的技術,應用十分廣泛。與傳統的測溫方法相比,紅外測溫方法具有時間短、精度高、使用簡單方便等優點。本文以環境溫度為被測對象,設計了以STC89C52單片機為控制中心的紅外測溫裝置,能夠實現對目標溫度的實時采集、處理、顯示和報警等功能。本設計主要是由STC89C52單片機、紅外測溫傳感器、LCD1602液晶顯示器、按鍵和蜂鳴器等部分組成,采用非接觸的方式對目標溫度進行實時檢測。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.
上傳時間: 2022-03-27
上傳用戶:jiabin
本系統基于STM32單片機設計的非接觸式電流檢測控制系統,通過OPA548片將所給任意信號放大,由100Ω電阻和INA128芯片進行電流電壓轉換放大后,利用STM32單片機對獲取的電壓信號以0.488μs頻率采樣,利用STM32單片機的FFT庫,獲得信號的諧波信息。測量電流信號精準,該設計可廣泛應用在以STM32單片機為核心控制器件的新型儀表中,性能精準且抗干擾能力強。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.
上傳時間: 2022-03-27
上傳用戶:
LED 線陣顯示裝置, 分為 LED 線性旋轉顯示主機和圖文錄入器兩部分。主機用直流電機帶動由紅綠 LED 組成的線陣旋轉, 同時線陣按照時序依次切換顯示狀態, 在固定區域利用視覺暫留效果形成 16×16 點陣, 用以顯示圖文;圖文錄入器用 HMI 觸控屏作為人機交互界面, 實現圖文錄入和回放功能。主機與圖文錄入器通過無線通信方式進行信息交互,可由圖文錄入器控制主機切換不同工作任務, 以及改變線陣顯示內容。The LED linear array display device is divided into two parts:the one is the main unit used to display content,and the other one is used to input the contents.The main unit is driven by a DC motor to rotate the linear array composed by red and green light emitting diodes.At the same time,the 16×16 dot matrix that switching the display state according to the time sequence on the main unit displays pictures and texts in the fixed area,by using the visual temporary effect.The HMI touch screen is used as human machine interface to realize the function that input and playback pictures and texts.The two parts of the device communicate with each other through wireless communication.The image and text input controller can control the main unit to switch different tasks and change the content of linear array displayed.
標簽: stc12c5a60s2 單片機 led
上傳時間: 2022-03-28
上傳用戶:jiabin
應用無跡卡爾曼濾波算法(UKF)進行鋰電池的SOC估計,采用Thevenin二階RC等效電路模型,對HPPC電池脈沖充放電實驗數據進行Matlab處理,得到較為準確的模型.通過在Matlab中編寫算法程序,對不同工況的估計值與實際值進行誤差估算及對比分析,通過此算法進行SOC估計,得到該算法可有效降低系統誤差并糾正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.
標簽: 卡爾曼濾波
上傳時間: 2022-05-03
上傳用戶:默默
Vivado設計分為Project Mode和Non-project Mode兩種模式,一般簡單設計中,我們常用的是Project Mode。在本手冊中,我們將以一個簡單的實驗案例,一步一步的完成Vivado的整個設計流程一、新建工程1、打開Vivado 2013.4開發工具,可通過桌面快捷方式或開始菜單中xilinx DesignTools-Vivado 2013.4下的Vivado 2013.4打開軟件,開啟后,軟件如下所示:2、單擊上述界面中Create New Project圖標,彈出新建工程向導,點擊Next.3、輸入工程名稱、選擇工程存儲路徑,并勾選Create project subdirectory選項,為工程在指定存儲路徑下建立獨立的文件夾。設置完成后,點擊Next注意:工程名稱和存儲路徑中不能出現中文和空格,建議工程名稱以字母、數字、下劃線來組成。4、選擇RTL Project一項,并勾選Do not specifty sources at this time,勾選該選項是為了跳過在新建工程的過程中添加設計源文件。點擊Next.IA5、根據使用的FPGA開發平臺,選擇對應的FPGA目標器件。(在本手冊中,以xilinx官方開發板KC705為例,Nexys4開發板請選擇Artix-7 XC7A100TCSG324-2的器件,即Family和Subfamily均為Artix-7,封裝形式(Package)為cSG324,速度等級(Speed grade)為-1,溫度等級(Temp Grade)為C)。點擊Next6、確認相關信息與設計所用的的FPGA器件信息是否一致,一致請點擊Finish,不一致,請返回上一步修改。二、設計文件輸入1、如下圖所示,點擊Flow Navigator下的Project Manager->Add Sources或中間Sources中的對話框打開設計文件導入添加對話框。2、選擇第二項Add or Create Design Sources,用來添加或新建Verilog或VHDL源文件,點擊Next
標簽: vivado
上傳時間: 2022-05-28
上傳用戶:默默
文檔資料 - 0視頻教程 - 0工具 - 0ESP8266開發板例程_基于NON-OS_SDK.zip - 273.05MB深藍串口調試工具(支持UTF-8) - 0樂鑫開發環境搭建 - 0技小新_MQTT單片機編程小工具 - 0UTF-8串口助手 - 0tcp調試助手 - 0SER-NET - 0MQTT_FX客戶端 - 0flash_download_tools_v3.6.3 - 0flash_download_tools_v3.6.3.rar - 6.61MBmqttfx-1.7.0-windows-x64 - 0
標簽: esp8266
上傳時間: 2022-06-05
上傳用戶:trh505