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：
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：
基于藥物治療在臨床治療中的重要性,分析目前服藥提醒裝置存在的不足,以STM32F103VET6單片機為控制核心,設計了一種多功能電子藥箱。該系統包括顯示模塊、語音模塊和數據存儲模塊。顯示模塊通過觸摸屏電路和LED指示燈電路,與語音模塊相配合,實現了服藥提醒及指導的功能;數據存儲模塊通過EEPROM存儲電路,能夠實現掉電時服藥信息不丟失的功能。并且為了實現電子藥箱的智能化控制,開發了手機APP,兩者之間可通過WIFI進行數據通信。經測試,該藥箱能夠有效地幫助慢性病患者按時、定量、正確服用藥物,適合在家庭中推廣使用,具有較高的應用價值和實踐意義。Based on the importance of drug therapy in clinical treatment, this paper analyzes the shortcomings of current drug reminder devices, and designs a multi-function electronic medicine box with STM32 F103 VET6 microcontroller as the control core. The system includes a display module, a voice module, and a data storage module. The display module cooperates with the voice module through the touch screen circuit and the LED indicator circuit to realize the function of reminding and guiding the medicine;the data storage module can realize the function of not losing the medication information when the power is off through the EEPROM storage circuit.After testing, the medicine box can effectively help chronic diseases patients to take drugs on time, in a quantitative and correct manner,and is suitable for popularization in the family, and has high application value and practical significance.
標簽： 電子藥箱
上傳時間： 2022-03-27
上傳用戶：
數字示波器功能強大,使用方便,但是價格相對昂貴。本文以Ti的MSP430F5529為主控器,以Altera公司的EP2C5T144C8 FPGA器件為邏輯控制部件設計數字示波器。模擬信號經程控放大、整形電路后形成方波信號送至FPGA測頻,根據頻率值選擇采用片上及片外高速AD分段采樣。FPGA控制片外AD采樣并將數據輸入到FIFO模塊中緩存,由單片機進行頻譜分析。測試表明:簡易示波器可以實現自動選檔、多采樣率采樣、高精度測頻及頻譜分析等功能。Digital oscilloscope is powerful and easy to use, but also expensive. The research group designed a low-cost digital oscilloscope, the chip of MSP430F5529 of TI is chosen as the main controller and the device of EP2C5T144C8 of Altera company is used as the logic control unit. Analog signal enter the programmable amplifier circuit, shaping circuit and other pre-processing circuit. The shaped rectangular wave signal is sent to FPGA for measure the frequency. According to the frequency value to select AD on-chip or off-chip high-speed AD for sampling. FPGA controls the off-chip AD sampling and buffers AD data by FIFO module. The single chip microcomputer receives the data, and do FFT for spectrum analysis. The test shows that the simple oscilloscope can realize automatic gain selection, sampling at different sampling rates, high precision frequency measurement and spectrum analysis.
上傳時間： 2022-03-27
上傳用戶：
IC-Ucc28950改進的相移全橋控制設計UcC28950是T公司進一步改進的相移全橋控制C，它比原有標準型UCC2895主要改進為Zvs能力范圍加寬，對二次側同步整流直接控制，提高了輕載空載轉換效率，而且此時可以ON/OFF控制同步整流成為綠色產品。既可以作電流型控制，也可以作電壓型控制。增加了閉環軟啟動及使能功能。低啟動電流，逐個周期式限流過流保護，開關頻率可達1MHz UCC28950基本應用電路如圖1所示，內部等效方框電路如圖2所示。*啟動中的保護邏輯UCC28950啟動前應該首先滿足下列條件：*VDD電壓要超過UvLo閾值，73V*5V基準電壓已經實現*芯片結溫低于140℃。*軟啟動電容上的電壓不低于0.55V。如果滿足上述條件，一個內部使能信號EN將產生出來，開始軟啟動過程。軟啟動期間的占空比，由Ss端電壓定義，且不會低于由Twm設置的占空比，或由逐個周期電流限制電路決定的負載條件電壓基準精確的（±1.5%5V基準電壓，具有短路保護，支持內部電路，并能提供20mA外部輸出電流，其用于設置DCDC變換器參數，放置一個低ESR，ESL瓷介電容（1uF-2.2uF旁路去耦，從此端接到GND，并緊靠端子，以獲得最佳性能。唯一的關斷特性發生在C的VDD進入UVLo狀態。*誤差放大器（EA+EA，COMP）誤差放大器有兩個未提交的輸入端，EA+和EA-。它具有3MHz帶寬具有柔性的閉環反饋環。EA+為同相端，EA-為反向端。COMP為輸出端輸入電壓共模范圍保證在0.5V-3.6V。誤差放大器的輸出在內部接到pWM比較器的同相輸入端，誤差放大器的輸出范圍為0.25V4.25V，遠超出PwM比較器輸入上斜信號范圍，其從0.8v-2.8V。軟啟動信號作為附加的放大器的同相輸入，當誤差放大器的兩個同相輸入為低，是支配性的輸入，而且設置的占空比是誤差放大器輸出信號與內部斜波相比較后放在PWM比較器的輸入處。
標簽： ucc2895
上傳時間： 2022-03-31
上傳用戶：
設計功率MOSFET驅動電路時需重點考慮寄生參數對電路的影響。米勒電容作為MOSFET器件的一項重要參數,在驅動電路的設計時需要重點關注。重點觀察了MOSFET的開通和關斷過程中柵極電壓、漏源極電壓和漏源極電流的變化過程,并分析了米勒電容、寄生電感等寄生參數對漏源極電壓和漏源極電流的影響。分析了柵極電壓在米勒平臺附近產生振蕩的原因,并提出了抑制措施,對功率MOSFET的驅動設計具有一定的指導意義。When designing the drive circuit of power MOSFET,the influence of parasitic parameters on the circuit should be concerned.As an important parameter of MOSFET device,Miller capacitance should be considered in the design of drive circuit.The variation of gate voltage,drain source voltage and drain source current during the turn-on and turn-off of MOSFET were observed.The influences of parasitic parameters such as Miller capacitance and parasitic inductance on drain source voltage and drain source current were analyzed.The reasons of gate voltage oscillation nearby Miller plateau were analyzed,and the restraining measures were put forward.This research was instructive for the drive design of power MOSFET.
標簽： mosfet
上傳時間： 2022-04-02
上傳用戶：默默
電源設計資料現代逆變技術及其應用.pdf - 6.63MB現代高頻感應加熱電源工程設計與應用.pdf - 23.81MB現代電源設計大全.pdf - 7.16MB仙童開關電源設計軟件Off-lineSMPSDesignTools1.6.zip - 5.32MB特種集成電源最新應用技術.pdf - 7.60MB實用電池充電器與保護器電路集錦.pdf - 6.56MB劉堅強電源維修視頻.zip - 2.19GB開源力量新版在線學習網站開通啦！.txt - 5.72KB開關穩壓電源--原理、設計與實用電路.pdf - 7.40MB開關電源知識.rar - 478.56KB開關電源原理與設計.pdf - 4.05MB開關電源原理與設計-經典.pdf - 682.32KB開關電源抑制噪聲技術.pdf - 283.13KB
標簽： 開關電源
上傳時間： 2022-06-05
上傳用戶：
高通藍牙芯片qcc5127詳細規格書datasheet.pdf英文版，共97頁 詳細說明:1 Package information(pin allocations, pios terminal functions)2 Bluetooth subsystem 3 Cystal oscillator4 System powerstates (Idel,Active,Sleep, Off)5 Host Interface subsystem6 Applications subsystem ( QSPI Flash controller)7 Audio subsystem(Dual core Kalimba, ROM, RAM and caches, Data, engine)8 Audio interfaces ( Analog, Digital, Simultaneous audio routing)9 Peripheral interfaces (PIOs, LED, USB, SPI, UART)10 Boot manager11 System manager12 example application schematic13 Electrical characteristics14 Audio performance15 Bluetooth performance16 Power consumption
上傳時間： 2022-06-12
上傳用戶：
le flows through MOS channel while Ih flows across PNP transistor Ih= a/(1-a) le, IE-le+lh=1/(1-a)' le Since IGBT has a long base PNP, a is mainly determined by ar si0 2ar= 1/cosh(1/La), La: ambipolar diff length a-0.5 (typical value)p MOSFET channel current (saturation), le=U"Cox"W(2"Lch)"(Vc-Vth)le Thus, saturated collector current Ic, sat=1/(1-a)"le=-1/(1-a)"UCox"W/(2Lch)"(Vo-Vth)2Also, transconductance gm, gm= 1/(1-a)"u' Cox W/Lch*(Vo-Vth)Turn-On1. Inversion layer is formed when Vge>Vth2. Apply positive collector bias, +Vce3. Electrons flow from N+ emitter to N-drift layer providing the base current for the PNP transistor4. Since J1 is forward blased, hole carriers are injected from the collector (acts as an emitter).5. Injected hole carriers exceed the doping level of N-drift region (conductivity modulation). Turn-Off1. Remove gate bias (discharge gate)2. Cut off electron current (base current, le, of pnp transistor)
標簽： igbt
上傳時間： 2022-06-20
上傳用戶：wangshoupeng199
一、IGBT 驅動1 驅動電壓的選擇IGBT 模塊GE 間驅動電壓可由不同地驅動電路產生。典型的驅動電路如圖1 所示。圖1 IGBT 驅動電路示意圖Q1，Q2 為驅動功率推挽放大，通過光耦隔離后的信號需通過Q1，Q2 推挽放大。選擇Q1，Q2 其耐壓需大于50V 。選擇驅動電路時，需考慮幾個因素。由于IGBT 輸入電容較MOSFET 大，因此IGBT 關斷時，最好加一個負偏電壓，且負偏電壓比MOSFET 大， IGBT 負偏電壓最好在-5V~-10V 之內；開通時，驅動電壓最佳值為15V 10％ ,15V 的驅動電壓足夠使IGBT 處于充分飽和，這時通態壓降也比較低，同時又能有效地限制短路電流值和因此產生的應力。若驅動電壓低于12V ，則IGBT 通態損耗較大， IGBT 處于欠壓驅動狀態；若 VGE >20V ，則難以實現電流的過流、短路保護，影響 IGBT 可靠工作。2 柵極驅動功率的計算由于IGBT 是電壓驅動型器件，需要的驅動功率值比較小，一般情況下可以不考慮驅動功率問題。但對于大功率IGBT ，或要求并聯運行的IGBT 則需要考慮驅動功率。IGBT 柵極驅動功率受到驅動電壓即開通VGE( ON )和關斷 VGE( off ) 電壓，柵極總電荷 QG 和開關 f 的影響。柵極驅動電源的平均功率 PAV 計算公式為：PAV =（VGE(ON ) +VGE( off ) ）* QG *f對一般情況 VGE( ON ) =15V，VGE( off ) =10V，則 PAV 簡化為： PAV =25* QG *f。f 為 IGBT 開關頻率。柵極峰值電流 I GP 為：
上傳時間： 2022-06-21
上傳用戶：
