2.7V to 5.5V input voltage Range? Efficiency up to 96% ? 24V Boost converter with 12A switch current Limit? 600KHz fixed Switching Frequency? Integrated soft-start? Thermal Shutdown? Under voltage Lockout? Support external LDO auxiliary power supply? 8-Pin SOP-PP PackageAPPLICATIONSPortable Audio Amplifier Power SupplyPower BankQC 2.0/Type CWireless ChargerPOS Printer Power SupplySmall Motor Power Supply
標簽： XR2981
上傳時間： 2021-11-05
上傳用戶：
高通(Qualcomm)藍牙芯片QCC5151_硬件設計詳細指導書（官方內部培訓手冊）共52頁其內容是針對硬件設計、部分重要元器件選擇(ESD，Filter）及走線注意事項的詳細說明。2 Power management 2.1 SMPS 2.1.1 Components specification 2.1.2 Input power supply selection 2.1.3 Minimize SMPS EMI emissions 2.1.4 Internal LDOs and digital core decoupling 2.1.5 Powering external components 2.2 Charger 2.2.1 Charger connections.2.2.2 General Charger operation2.2.3 Temperature measurement during charging 2.3 SYS_CTRL 3 Bluetooth radio3.1 RF PSU component choice 3.2 RF band-pass filter3.3 Layout (天線 走線的注意事項)4 Audio4.1 Audio bypass capacitors 4.2 Earphone speaker output4.3 Line/Mic input 4.4 Headphone output optimizition5 LED pads 5.1 LED driver 5.2 Digital/Button input 5.3 Analog input5.4 Disabled 6 Reset pin (Reset#)7 QSPIinterface 8 USB interfaces 8.1 USB device port8.1.1 USB connections8.1.2 Layout notes8.1.3 USB Charger detection
上傳時間： 2022-01-24
上傳用戶：XuVshu
The PW4556 series of devices are highly integrated Li-Ion and Li-Pol linear Chargers targetedat small capacity battery for portable applications. It is a complete constant-current/ constantvoltage linear Charger. No external sense resistor is needed, and no blocking diode is required dueto the internal MOSFET architecture. It can deliver up to 300mA of charge current (using a goodthermal PCB layout) with a final float voltage accuracy of ±1%. The charge voltage is fixed at 4.2V or4.35V, and the charge current can be programmed externally with a single resistor. The Chargerfunction has high accuracy current and voltage regulation loops and charge termination
標簽： pw4556
上傳時間： 2022-02-11
上傳用戶：1208020161
The PW4554 is a cost-effective, fully integrated high input voltage single-cell Li-ion battery Charger.The Charger uses a CC/CV charge profile required by Li-ion battery. The Charger accepts an inputvoltage up to 24V but is disabled when the input voltage exceeds the OVP threshold, typically 6.8V,to prevent excessive power dissipation. The 24V rating eliminates the over-voltage protection circuitrequired in a low input voltage Charger
標簽： pw4554
上傳時間： 2022-02-11
上傳用戶：
PW4203 is a 4.5-22V input, 2A multi-cell synchronous Buck Li-Ion battery Charger, suitable forportable application. Select pin is convenient for multi-cell charging. 800 kHz synchronous buckregulator integrates of 22V rating FETs with ultra low on- resistance to achieve high efficiency andsimple circuit design.The PW4203 is available in an 8-pin SOP package, provides a very compact system solution andgood thermal conductance
標簽： pw4203
上傳時間： 2022-02-11
上傳用戶：
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：
以AT89S52單片機為控制核心,采用電容降壓技術,Buck電路拓撲,PWM驅動模塊和功率器件散熱設計,通過高速的數據采集、主功率輸入輸出模塊和控制模塊,設計一種新型智能車載充電器.在充電過程中,通過負脈沖瞬間放電實現對鉛酸蓄電池的再生修復,提高電池的有效容量,延長使用壽命.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.
標簽： 車載充電器
上傳時間： 2022-03-27
上傳用戶：
高通(Qualcomm)藍牙芯片QCC5144_硬件設計詳細指導書（官方內部培訓手冊）其內容是針對硬件設計、部分重要元器件選擇(ESD，Filter）及走線注意事項的詳細說明。2 Power management 2.1 SMPS 2.1.1 Components specification 2.1.2 Input power supply selection 92.1.3 Minimize SMPS EMI emissions 2.1.4 Internal LDOs and digital core decoupling 2.1.5 Powering external components 2.2 Charger 2.2.1 Charger connections.2.2.2 General Charger operation2.2.3 Temperature measurement during charging 2.3 SYS_CTRL 3 Bluetooth radio3.1 RF PSU component choice 3.2 RF band-pass filter3.3 Layout (天線 走線的注意事項)4 Audio4.1 Audio bypass capacitors 4.2 Earphone speaker output4.3 Line/Mic input 4.4 Headphone output optimizition5 LED pads 5.1 LED driver 5.2 Digital/Button input 5.3 Analog input5.4 Disabled 6 Reset pin (Reset#)7 USB interfaces7.1 USB device port7.1.1 USB device port7.1.2 Layout notes 7.1.3 USB Charger detectionA QCC5144 VFBGA example schematic and BOM B Recommended SMPS components specificationB.1 Inductor specifition B.2 Recommended inductors B.3 SMPS capacitor specifition
上傳時間： 2022-04-07
上傳用戶：默默
USB Power Delivery 快速充電通信原理本篇文章講的快速充電是指USB 論壇所發布的USB Power Delivery 快速充電規范(通過VBUS 直流電平上耦合FSK 信號來請求充電器調整輸出電壓和電流的過程)，不同于本人發布的另一篇文章所講的高通Quick Charger 2.0 規范，因為高通QC2.0是利用D+ 和D- 上的不同的直流電壓來請求充電器動態調整輸出電壓和電流實現快速充電的過程。USB PD 的通信是將協議層的消息調制成24MHZ 的FSK 信號并耦合到VBUS上或者從VBUS 上獲得FSK 信號來實現手機和充電器通信的過程。如圖所示， 在USB PD 通信中， 是將24MHz 的FSK 通過cAC-Coupling 耦合電容耦合到VBUS 上的直流電平上的， 而為了使24MHz 的FSK 不對Power Supply或者USB Host 的VBUS 直流電壓產生影響，在回路中同時添加了zIsolation 電感組成的低通濾波器過濾掉FSK 信號。
標簽： USB-PD協議
上傳時間： 2022-06-21
上傳用戶：
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